Gathering Electronics Parts! - Alexandria Egypt

[myousry]

hi everybody i really really thanks everyone for this beautiful site. i kept looking around for the best site to build a cnc machine and never got better than this .
my name is mohamed yousry i am an accountant -yes it does not relate to my job at all-and my partner walid abed also an accountant , i live at the beautiful city alexandria, Egypt it's on the Mediterranean sea and he lives in a damnhour . we already have a modest cnc machine that we bought from http://thommcarr.com/index.html the problem with this machine that it's so slow and we need a faster one .so we decided to build rather than buy . so we studied from this site as much as we could and we made our order from steve -PMDX for a PMDX-125 bundled with 4 gecko and the PMDX-135 5020 and PMDX-106 spindle controller interface .

[domino11]

Welcome Myousry

[myousry]

the 4 gecko didnt arrive because of a mistake by PMDX company as they didn't enclose them with our order. Later on the company found they were wrong and they are now in their way to us . As everyone can see the PMDX-125 has some terminals little bit bent, an error from ARAMEX the shipping company:mad: and after filling a complain application for its bad shipping service it cost them not to pay for the custom and the salestax for that order :) and the shipping charge was nothing to us

[myousry]

welcome heath thanks a lot

[myousry]

my plan is a 3.0m by 2.4 m with 3 axis at first it intend to use PK299-F4.5A from oriental motor as with belt no backlash. i will go for unipolar or bipolar -parallel . can anybody tell me the best torrodial transformer for me ????
i will go buying the chinese spindle and the delta VFD-EL series or VFD-B series
can anyone tell what will suit my PMDX-106 ???
thanks a lot guys

[cvriv.charles]

Welcome. The mechmate will prevail over the one you bought.

[KenC]

Welcome!
Even accountants (2 of them to be exact) thinks that the MM is a bang for the buck...

hope to see you progress

[cvriv.charles]

I followed the link they posted for thier other machine,... the mechmate compared to what they have now is like night and day, going from a dinky car to a Bugatti. Seriously. The one they have now fits on a desk. LOL.

[KenC]

They actually sell those toothpick framed CNC router for real money???
WOW!!! I admire their marketing skill! :cool:

[cvriv.charles]

Its only $950 dollars though. Huge price difference. As the saying goes,... you get what you pay for:)

[Sergio-k]

Welcome Myousry.

The answer to your power supply need lies here : http://www.mechmate.com/forums/forumdisplay.php?f=10

Study the forum a lot
Study the plans a lot
and then study the forum a lot, study the plans a lot ..............

I still remember that this was the first advise they gave me (Ries)
and the most important one !!.

Good luck with your build.

[quadtech]

Mohamed,

Those terminals on the PMDX are bent pretty bad.
Hope you checked with a multimeter/continuity tester that each
terminal makes proper electrical contact with the PCB traces.
Good luck with your build.

[Richards]

The PK299-F4.5 motor is rated 2.5mH inductance. You can use a power supply up to 50V. I get excellent results with a 35VDC power supply, but I have also used a 48VDC power supply. When the motor is wired bipolar parallel, and run from a 48VDC power supply, the motor will run hot. Mine runs at 80C. When wired half-coil, the motor will run at about 65C.

Multiply the DC voltage that you want by 0.7071 to get the AC voltage of the transformer that you'll need. A 25VAC transformer will give you about 35VDC and a 35VAC transformer will give you about 50VDC. The actual voltage depends on the line voltage going to the transformer and the diodes used in the power supply to change AC to DC.

Remember that the PK299-F4.5 motor pulls 4.5A when wired half-coil and 6.3A when wired parallel. If you wire the motors half-coil, a 25VAC 300VA transformer would be my first choice. A 35VAC 450VA transformer would be my second choice. If you wire the motors parallel, a 25VAC 400VA transformer would be my first choice and a 35VAC 550VA transformer would be my second choice.

Running the motors at 35VDC instead of 50VDC will cost you a little speed, but even if you add a belt drive 4:1, you'll only need about 750 RPM to jog an axis at 900 inches per minute. The PK299 will run faster than 1,000 RPM at 35VDC.

[myousry]

hi mike i found in the forum an excel file that calculate the required power supply do you think this file is okay or it's wrong? i attached the a photo of the calculation . i intend to buy from antek a toroidal transformer but i am confused with their datasheets as the calculation of the excel file does not match. how will this calculation suits my PMDX-135 5020? will this power source board be able to bear the load in case i go for bipolar parallel as i see the required current 25.2 and the PMDX-135 5020 only 20 thanks

[myousry]

hi mike do this http://www.antekinc.com/pdf/AN-8234.pdf suits my needs or i will begin to a smoke party in my workshop:)

[myousry]

well i did own a cnc machine and here somethings we already done with it

[Richards]

The motors won't draw the maximum current unless they are run at full load. You'll be safe if you rate the total draw at 66% of maximum (see Gerald's posts about current consumption). I used the lower figures when I recommended the 25VAC 300VA transformer (for half-coil) or the 25VAC 400VA transformer if you wire the motors bipolar parallel.

You can use the 35VAC models, but you will mostly end up with excessive heat. The higher speed will be of no use on a CNC router unless you like to get gray hair. I jog my machine at 12-ips. That's fast enough when you're using high torque motors that might force the gantry into the stops if something goes wrong. (It makes an impressive noise when the gantry hits the stops, even at 12-ips.) A 25VAC transformer will give you about 35VDC. That will easily let the motors spin at 1,000 RPM, which, even at 4:1, will let the machine jog faster than 15-ips.

25 VAC X 12 Amps = 300 VA

The Antek AN3225 is large enough if you wire the motors half-coil.

The Antek AN4225 would be better if you wire the motors bipolar parallel.

Even if you wire the motors bipolar parallel, they will draw less than 17A (6.3A X 4 = 25.2A and 25.2A X 0.66 = 16.6A)

[Johannescnc]

Nice looking work! no matter what machine you used... Thanks for sharing the photos.

[myousry]

thanks john for your comments we really had lots of time to learn to make our current machine work . no one told us how to run it even the seller who sold us the machine. he gave us the PC included an unconfigured MACH3 so we have to read from scratch from the hardware until the software we are using to make toolpaths with it and now we intend to grow bigger with MM machine

[myousry]

hi mike do you know which kind of delta's VFD series will suit our PMDX-106 ? thanks a lot

[cvriv.charles]

I plan on using a chinese spindle too. And I read that the VFD thays "paired" with it has problems. Atleast with the buttons not working. The VFDs you mentioned work with the spindle too? Any other VFDs work with the spindle? I am trying to route out problematic compentents:) Cant be worrying about anything once my machine is built.

[bradm]

The HY VFD has been aggressively "value engineered"; it's almost a free giveaway with the spindle, and the fact that it's not expected to be sold standalone shows.

You need to look at the motor and VFD specifications to "pair" them. Pretty much all of the chinese water cooled spindle are 3 phase, 400 Hz - it would be hard to imagine another design. So you need to match them with a VFD that will run up to 400 Hz (some are designed for controlling motors back at 50/60 hz, and don't go up high enough), supports the same voltage range as the spindle motor, and matches or exceeds the amperage rating of the motor. The (possibly discontinued) Hitachi X200 series is one example of a good VFD that works with these spindles, but there are many others.

[cvriv.charles]

Whoa! 3-Phase?!?! So as a residential user who only has 1-phase,... i cant use the chinese spindle? Or is this where the VFD comes in and magically runs a 3-phase spindle on 1-phase power? I am a bit disappointed now. Very dissappointed actually.

[cvriv.charles]

Just checked the specs in an ebay auction for one of them and it says 220 - 250v. Doesnt say anything about 3-phase power. You can do 220v on 1-phase power.

[bradm]

Charles, this is covered elsewhere, but the VFD converts it's input power into DC, and then to 3 phase to drive the spindle. For VFDs up to about 3KW, it's pretty common for the diodes that convert the input power to be oversized enough to be fed by single phase power - that's how mine works. Over 3KW you can still use single phase power, but sometimes need to oversize the VFD by about 1/3 to get input diodes large enough to run the system on only two legs instead of three.

The spindle is 3-phase, but the VFD can be fed either 3-phase or single phase, using more amperage in single phase, of course. This will be in the specifications of the VFD. The HY VFD does allow this.

[cvriv.charles]

ok. I guess when the time comes I go into detail about this in my worklog. Thanks.

[myousry]

hi guys i really appreciate the discussions about the VFD . i primarily know what is VFD .my intention is get a Delta VFD to suit the PMDX-106 http://www.pmdx.com/PMDX-106 . do the VFD-EL series suit my PMDX-106 or the PMDX-106 can run any VFD ? i intent to use the chinese spindle to engrave not only in wood , plastic, aluminum but in granite and marble. steel is out of subject matter . thanks a lot guys

[cvriv.charles]

I wouldnt disclude steel:) There's a member here that used his mechmate to cut out the mechmate parts out of steel:) It did a beautiful job. He said he did some modifications to his machines for this but it is very possible.

[myousry]

hi everyone
what's best TECO's VFD MA7200 or DELTA VFD-B series ones thanks a lot

[bradm]

myoursry, either of those VFD series should work. "Best" is hard to state.

[KenC]

ALL VFD with that can supply 3 phase power to the spindle are suitable.

Suitable should also include what power you have at your location...

"Best" should also include, after sales service, availability, ease of operation .... etc...

[myousry]

hi guys i received my missing GECKOS's i am so glad to have them . now i am so excited on my next step which will be ordering the motors and the toroidal transformer

[myousry]

hi guys we received our KL-2200 chinese spindle i here attach the photos. i wish if anyone has an advice regarding this spindle,we surely appreciate it.
we have received the AN-5230 500VA Transformer from https://www.antekinc.com/details.php?p=100 and a heatsink heatsink 5.375 Profile 16 Inch from http://www.heatsinkusa.com/storename/heatsinkusa/dept/263597/ItemDetail-10502646.aspx they are still at cairo i will have them the next week as my friend walid is so busy to get them.
we have also order 4 Item # PK299-F4.5B, 2-Phase Stepping Motor
from http://catalog.orientalmotor.com/item/stepping-motors/pk-series-stepping-motors/pk299-f4-5b?&plpver=11&origin=keyword&by=prod&filter=0
they are still in their way to egypt

[myousry]

this is a list of what we are planning to order any things missed i appreciate your
PMDX-104 http://www.pmdx.com/PMDX-104
Delta 230 V 3HP Single Phase VFD VFD022B21A http://www.cshincorporated.com/product_info.php/cPath/1445_1447/products_id/9836
spindle mount http://www.spindlemounts.com/
ER 20 COLLET 14 PIECE METRIC SET http://www.maritool.com/Collets-ER-Collets-ER-Collet-Sets/c21_56_22/p30/ER-20-COLLET-14-PIECE-METRIC-SET/product_info.html
EHEIM Universal Pump 1260 outdoor http://www.aquasythe.com/Products/Eheim-1260-Universal-br-Water-Pump__WP-EH-1260.aspx
Neutrik NC4FXX-B and NC4MXX-B 4-Pin XLR Cable Connectors with Black Shell and Gold Contacts http://www.markertek.com/Cables-Connectors-Adapters/Audio-Connectors/XLR-Connectors/Neutrik-USA-Inc/NC4FXX-B.xhtml?NC4FXX-B
Neutrik NC4FXX-B and NC4MXX-B 4-Pin XLR Cable Connectors with Black Shell and Gold Contacts http://www.markertek.com/Cables-Connectors-Adapters/Audio-Connectors/XLR-Connectors/Neutrik-USA-Inc/NC4FXX-B.xhtml?NC4FXX-B
Basic Laser Cut Parts Kit (Includes Feet) http://www.cvsupply.com/servlet/the-4/Basic-Laser-Cut-Parts/Detail
Machined Parts - Idler and Bushings http://www.cvsupply.com/servlet/the-8/Machined-Parts--dsh--Idler/Detail
Rail Grinding Skate http://www.cvsupply.com/servlet/the-13/Rail-Grinding-Skate/Detail
Stop Blocks http://www.cvsupply.com/servlet/the-9/Stop-Blocks/Detail
Motor Belt Drive Plates http://www.cvsupply.com/servlet/the-15/Motor-Belt-Drive-Plates/Detail
Idler Bearing http://www.cvsupply.com/servlet/the-11/Idler-Bearing/Detail



TMG2 24CM RADIATOR http://thermaltakeusa.com/Product.aspx?C=1446&ID=1843#Tab0
Flow TX Plus http://thermaltakeusa.com/Product.aspx?C=1446&ID=1640



Delta Communication Interface, USB-to-RS485 Converter (was VFD-USB01) http://www.factorymation.com/s.nl/it.A/id.36360/.f?sc=2&category=38
AECO Inductive Proximity Sensor,*12 mm diameter, stainless steel, extended range, 10-30 VDC, 3-wire, NPN, unshielded,*8 mm sensing distance, N.O. output, M12 quick-disconnect (purchase cable separately) SI12-DCE8 NPN NO H S http://www.factorymation.com/s.nl/it.A/id.5210/.f?sc=2&category=14129
AECO M12 cable for quick-disconnect sensors, right angle plug, 4 poles, 5 meter cable with PVC jacket and M12 connector MOD.15/4 LC5 http://www.factorymation.com/s.nl/it.A/id.5270/.f?sc=2&category=14665
Relpol Electromechanical Relay, Interface Terminal Block Style, 6A SPDT, 24VDC Coil, with LED indicator (Special Order) PIR6W-1P-12VDC http://www.factorymation.com/s.nl/it.A/id.5416/.f?sc=2&category=11127
IMO DIN-Rail Terminal Block, Feed-thru, 20A, 600V, 26 - 12AWG, Red, 100pcs http://www.factorymation.com/s.nl/it.A/id.282/.f?sc=2&category=136
IMO DIN-Rail Terminal Block, Feed-thru, 20A, 600V, 26 - 12AWG, Black, 100pcs http://www.factorymation.com/s.nl/it.A/id.278/.f?sc=2&category=136
IMO Jumper Bar, 2 Pole for 2.5mm Terminal Block, 25pcs http://www.factorymation.com/s.nl/it.A/id.254/.f?sc=2&category=75
IMO Jumper Bar, 10 Pole for 2.5mm Terminal Block, 5pcs http://www.factorymation.com/s.nl/it.A/id.252/.f?sc=2&category=75
End Plate for all ER2.5 to ER10 Terminal Blocks, Beige, 25 pcs http://www.factorymation.com/s.nl/it.A/id.1349/.f?sc=2&category=74
IMO DIN-Rail Terminal Block, End Bracket, 20pcs, Beige http://www.factorymation.com/s.nl/it.A/id.326/.f?sc=2&category=74
35 mm DIN-rail, aluminum, 1 meter (39.37") length, 5pcs. http://www.factorymation.com/s.nl/it.A/id.796/.f?sc=2&category=77
DIN Rail Support Bracket, Galvanized Steel, 50mm, package of 10 http://www.factorymation.com/s.nl/it.A/id.4058/.f?sc=2&category=77
IMO DIN-Rail Terminal Block, Ground, 26 - 10AWG, 10pcs http://www.factorymation.com/s.nl/it.A/id.314/.f?sc=2&category=14876
IMO DIN-Rail Terminal Block, Lever Fuse-Holder, 5x20mm, 26 - 8AWG, 5pcs, Beige http://www.factorymation.com/s.nl/it.A/id.65459/.f?sc=2&category=14875
SCAME ENCLOSURE, 75x145x54mm (2.95x5.71x2.09in), IP65, Inline Pushbutton Enclosure, 22MM - 3 hole, Self-Extinguishing Thermoplastic http://www.factorymation.com/s.nl?it=A&id=4632&category=
WEG 22mm Non-metallic, Flush Operator, IP66, Green http://www.factorymation.com/s.nl/it.A/id.475/.f?sc=2&category=87
WEG 22mm Non-metallic, Single Contact Block, 1 N.O http://www.factorymation.com/s.nl/it.A/id.537/.f
WEG 22mm Non-metallic, Flush Operator, IP66, Yellow http://www.factorymation.com/s.nl/it.A/id.476/.f?sc=2&category=87
WEG 22mm Non-metallic, Single Contact Block, 1 N.O http://www.factorymation.com/s.nl/it.A/id.537/.f
WEG 22mm Non-metallic, Flush Operator, IP66, Black http://www.factorymation.com/s.nl/it.A/id.478/.f?sc=2&category=87
WEG 22mm Non-metallic, Single Contact Block, 1 N.O http://www.factorymation.com/s.nl/it.A/id.537/.f
WEG 22mm Non-metallic, Double Pushbutton Operator w/ center illumination lens , IP40, "I / O" http://www.factorymation.com/s.nl/it.A/id.483/.f?sc=2&category=87
WEG 22mm Non-metallic, Double Contact Block, 1 N.O. +1 N.C. http://www.factorymation.com/s.nl/it.A/id.541/.f
WEG 22mm Non-metallic, Modular Pilot Light, IP66, Green, Requires Lamp Block (Ordered Separately) http://www.factorymation.com/s.nl/it.A/id.534/.f?sc=2&category=91
LED Block for WEG 22mm Non-metallic Operators, 220V AC , Green (LED included) http://www.factorymation.com/s.nl/it.A/id.575/.f?sc=2&category=151
WEG 22mm Emergency Stop pushbutton, Non-metallic, Mushroom Operator (40mm), Twist-to-release, IP66, Red http://www.factorymation.com/s.nl/it.A/id.481/.f?sc=2&category=163
WEG 22mm Non-metallic, Single Contact Block, 1 N.C.( Delayed Break) http://www.factorymation.com/s.nl/it.A/id.540/.f
ENSTO Rotary Load Break Disconnect Switch, 3 Pole, 600V, 40A http://www.factorymation.com/s.nl/it.A/id.4511/.f?sc=2&category=5982
ENSTO Rotary Load Break Disconnect Handle, NEMA 4/4X, YELLOW / RED http://www.factorymation.com/s.nl/it.A/id.4517/.f?sc=2&category=5982
ENSTO Shaft 200mm (7.87") for Rotary Load Break Disconnects includes brass collar http://www.factorymation.com/s.nl/it.A/id.4843/.f?sc=2&category=5982
ECO IEC Contactor - 35A, 230VAC / 60Hz Coil, 3 Pole 600V, 1 N.O. / 1 N.C. Aux *Replaces Part Number CN-35R-I6* http://www.factorymation.com/s.nl/it.A/id.105/.f?sc=2&category=16
Ensto 3/4" cord grip w/ seal ring and nut http://www.factorymation.com/s.nl/it.A/id.5490/.f?sc=2&category=14659
Micron DC Switching Power Supply, Slim-line, DIN-rail mount, Plastic Case, 12V/4.2A Output, 85-264VAC Input MD-50-12-1 http://www.factorymation.com/s.nl/it.A/id.55549/.f?sc=2&category=34537
what are missing here the cable chain carrier do anyone know where to order them from ? thanks a lot

[isladelobos]

Hi myousry

Im reading in Factorymation (http://www.factorymation.com/s.nl/sc.7/category.20855/.f) but, They sent outside usa continent?

[myousry]

i have a mailbox through a forwarder in US and afterwards he forwards the package to egypt

[myousry]

by the way i've already got all previous stuff through this way

[silverdog]

what are missing here the cable chain carrier do anyone know where to order them from ? thanks a lot

http://www.brevettistendalto.it/
they are very cooperative, they also sell chain cables
ciao

[myousry]

thanks a lot sergio i really adore your built machine

[myousry]

sorry i thought you were sergio #61 any way thanks a lot for your help

[myousry]

by the way what do you think about this collection for spindle cooling
XSPC 500 Passive Aluminium Reservoir - Blue http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
Koolance Nozzle Pair, G1/4 Swivel Angled [13mm,1/2"]NZL-L13KG http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
Koolance Radiator, 2x120mm, Copper Hort. [no nozzles] http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_457_667_673&products_id=25444
Koolance Nozzle Pair, G1/4 Swivel Angled [13mm,1/2"]NZL-L13KG http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
Koolance PMP-450 Strong High-flow Pump http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_201&products_id=25773

[DeadGuy]

Do not mix any aluminum with you copper/brass radiator loop. It will over time cause the system to corrode!

Trust me on this. I have seen it many times.

Dennis




by the way what do you think about this collection for spindle cooling
XSPC 500 Passive Aluminium Reservoir - Blue http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
Koolance Nozzle Pair, G1/4 Swivel Angled [13mm,1/2"]NZL-L13KG http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
Koolance Radiator, 2x120mm, Copper Hort. [no nozzles] http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_457_667_673&products_id=25444
Koolance Nozzle Pair, G1/4 Swivel Angled [13mm,1/2"]NZL-L13KG http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
Koolance PMP-450 Strong High-flow Pump http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_201&products_id=25773

[myousry]

Do not mix any aluminum with you copper/brass radiator loop. It will over time cause the system to corrode!

Trust me on this. I have seen it many times.

Dennis
thanks dennis
i here add this link for anyone who do not know even me did know about it
http://fourseasonsroofingandsiding.com/mixmetals.htm#galvanicscale

[Gerald D]

In a closed cooling system, were the liquid coolant is closed inside the system, the coolant can be chemically treated so that it does not cause corrosion between copper and aluminium. A mix of these metals is common in engines, and that is why engines have "anti-freeze" in the water. . . . it is also the anti-corrosive chemical.

[myousry]

hi gerald in case of my choice XSPC 500 Passive Aluminium Reservoir - Blue http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_318_665&products_id=22695
is it okay to use it with an anti-corrosive chemical like these ones
http://www.koolance.com/water-cooling/default.php?cPath=58

[Gerald D]

I would not trust those chemicals in my car's engine! :)

[myousry]

what's your suggestion ? I appreciate your opinion .:)

[DeadGuy]

Unless your Chinese spindle has some aluminum parts in it stay away from that reservoir. Better to use an acrylic one. When it comes to computer water cooling parts I have had some experience.

[myousry]

so dennis i have to change to aluminum radiator like this one http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=59_457_667_673&products_id=25673 and make the whole system goes for aluminum and use your acrylic reservoir's suggestion. okay what about the nozzles they are nickel-plated brass do i still in
jeopardy of corrosion thanks for patience

[myousry]

hi gerald regarding this thread http://www.mechmate.com/forums/showthread.php?p=22382&postcount=5 the fittings shown there are brass so will this affect the body of the spindle on the long run

[DeadGuy]

If the Chinese spindle does not have aluminum parts don't change anything except the reservoir.

Dennis

[Sergio-k]

Hi Myousry.

I have used this reservoir in my setup.
http://i802.photobucket.com/albums/yy309/sergio-k/Fin2.jpg

I was also concerned about the aluminum fins in the reservoir tank but i did
some research about metal corrosion and as Gerald stated above the mix of aluminum and copper is very common in engines.
The key factor is the liqiud coolant which must have anti-corrosive chemicals
in it.
It's better to stay out of computer liquid coolants as they don't seem to meet this requirements.
My friend is an enginneer and what he reassured me was that the corrosion factor in a cooling system it's NOT the mix of metals but the liquid.
Typical straight ethylene glycol antifreeze doesn't react well with the materials in your cooling system and can eat away at the metal, rubber, and plastic components.
Hope i've helped you.

Sergio

[Gerald D]

I would use the same stuff that is needed for the modern car engine. Look in the instruction book for your car.

[KenC]

I think you guys are talking about galvanic corrosion, wiki (http://en.wikipedia.org/wiki/Galvanic_corrosion)
The corrossion will accelerate if there are stray cureent flowing withing the system, the boat guys will know this better then I do.
The root solution is to use a zinc sacrificial anode (ensure it is electrical direct contact with the bare material of the cooler) , all other part that are in contact with the coolant (electrolyte) will last from galvanic corrosion for years to come.
With or without the anode, it is always beneficial to use auto anti-freeze... neat or diluted...

[Sergio-k]

Ken
You are correct.
We use zinc in the boats to prevent from galvanic corrosion BUT only because
salt water doesn't have any anti-corrosive chems.

Galvanic corrosion results when two dissimilar metals, like aluminum and stainless steel, in close proximity to each other are immersed in water with enough impurities to act as an electrolyte. When this occurs, one of the metals acts like the cathode on a battery and remains intact while the other acts like the battery's anode and corrodes

In a closed cooling circuit with no oxygenation and a correct antifreeze dilution the corrosion is almost zero.

[Gerald D]

Sergio, I guess your boat has MTU engines? When I was in the navy, responsible for some MTU's, their specification was for special oil to be mixed with the coolant water (1.5% oil). Today they have an on-line document (http://www.mtu-online.com/fileadmin/fm-dam/mtu-global/pdf/valuecare/A001061_33E.pdf) that describes these things.

I would only use zinc blocks if I could not treat the liquid.

[Sergio-k]

Back Again after dry dock works in the boat which kept me busy.

@Gerald.
No Gerald we have M.A.N engines but the principles stay the same and we too
use a special oil mixture in our coolant water.

It couldn't be more coincidence than that so i'm posting some photos of
the boat's keel while at dry dock operations.

Here is a picture while the boat is being lifted.
You can see the algae & mussels built up on boat's keel.
http://i802.photobucket.com/albums/yy309/sergio-k/BoatUp1.jpg

And during the travel to our drydock place.
http://i802.photobucket.com/albums/yy309/sergio-k/BoatUp2.jpg

Note the corrosion in the propeller's Zinc and in the aft's zinc plates just above the flaps and the aft thruster.
In this boat we have also an active anti corrosion system (Impressed current cathodic protection (ICCP) which use anodes connected to a DC power source in the thruster area.
http://i802.photobucket.com/albums/yy309/sergio-k/PropBfr.jpg
http://i802.photobucket.com/albums/yy309/sergio-k/AftBfr.jpg

Polishing the props
http://i802.photobucket.com/albums/yy309/sergio-k/BoatGrind.jpg

All boat primered
http://i802.photobucket.com/albums/yy309/sergio-k/BoatPrimr.jpg

And finally new antifouling paint and new zinc.
http://i802.photobucket.com/albums/yy309/sergio-k/AftAfter.jpg
http://i802.photobucket.com/albums/yy309/sergio-k/PropAfter.jpg

[domino11]

That sure is a nice boat Sergio!

[Johannescnc]

Great work! I'm sure it will preform better too! :)

[qroger]

[QUOTE=myousry;42944]Basic Laser Cut Parts Kit (Includes Feet) http://www.cvsupply.com/servlet/the-4/Basic-Laser-Cut-Parts/Detail
Machined Parts - Idler and Bushings http://www.cvsupply.com/servlet/the-8/Machined-Parts--dsh--Idler/Detail
Rail Grinding Skate http://www.cvsupply.com/servlet/the-13/Rail-Grinding-Skate/Detail
Stop Blocks http://www.cvsupply.com/servlet/the-9/Stop-Blocks/Detail
Motor Belt Drive Plates http://www.cvsupply.com/servlet/the-15/Motor-Belt-Drive-Plates/Detail
Idler Bearing http://www.cvsupply.com/servlet/the-11/Idler-Bearing/Detail

There is a redundancy in the parts listed above. You should read the descriptions at the cvsupply site before you order.

Good luck on the build!
Roger

[myousry]

hi guys i got my VFD after being lost or forgot at aramex USA depot . what i ve got for this wasted time . we are sorry - by aramex stuff.:mad:
Also we have the 4 oriental motor lost somewhere and we are trying to find them.:mad:
guys is DHL better ?:confused:
thanks for your patience

[qroger]

[QUOTE=myousry;42944]Basic Laser Cut Parts Kit (Includes Feet) http://www.cvsupply.com/servlet/the-4/Basic-Laser-Cut-Parts/Detail
Rail Grinding Skate http://www.cvsupply.com/servlet/the-13/Rail-Grinding-Skate/Detail

There is a redundancy in the parts listed above. You should read the descriptions at the cvsupply site before you order.

Good luck on the build!
Roger

Rail Grinding Skate
This is not needed if you bought the MechMate Basic Laser Cut Parts set above.

[myousry]

thanks a lot for you Roger i got your notes and took it into my consideration to remove redundant purchases

[PEU]

Myousry, thanks for your detailed parts list, I used it to learn whats needed for the ensto breakers, I think you missed:
ENSTO Rotary Load Break Disconnect Switch, Door Mount Kit / $9.00 / http://www.factorymation.com/s.nl/it.A/id.5831/.f it goes on the backside of the control box door. Check this datasheet for complete aasembly: http://factorymation.info/Disconnects/ensto_ksrd3.pdf

Im looking for a similar part available in the local market, but if I fail I'll go with ensto.

[myousry]

thanks pablo i will add them to my list although i made changes to my list thanks again

[myousry]

i got my heatsink and my toroidal transformer but for the stepper motors, we got our money back as oriental motors didn't send them to us. i don't know why:confused:
and now we have to buy chinese stepper

[Johannescnc]

Looks like another damaged part... Is this typical for Egypt? Still, I don't think it would be too difficult to fix.

[myousry]

aramex is a lousy shipping company but we stuck to it for being the cheapest shipping company in EGYPT

[myousry]

i made today some shopping for some stuff which equivalent to that in www.factorymation.com. there still other stuff to buy i am searching for it

[myousry]

more shopping.... I didn't buy the solid sate relays yet and my motor connectors
i have to go to cairo to buy them they are not found in alexandria

[myousry]

hi guys i forgot to upload the photos of the proximity sensors here is one of them. 4x NPN NO 4mm sensitivity 12mm diameter

[myousry]

hi guys all what i found for the xlr connectors was the 5 pole and the solid state relays with their heatsink

[myousry]

hi guys,
i bought this voltage monitoring relay as there is an over voltage situation in egypt happens i.e you may find a 380V in a 220V power line because of a stupid electrical engineer :mad::(. the link for relay
http://www.hiquel.com/en/machine-automation/monitoring-control-relays/in-case-series-225mm-for-industrial-applications/icv-single-phase-voltage-control.html
i have changed the 35amps contactor with a 50 amps. i going to let the relay to control the coil of the replaced contactor in case of an overvoltage or undervoltage case took place. the problem that i face is that the coil of the relay needs to have an isolated AC 220V power source .
i intend to buy a UPS for the PC that will run the machine and to power the coil of the relay.
can any UPS take the 380V without being barbecued ??? thanks a lot

[Johannescnc]

Are you certain about the Engineering? Are the power lines overhead as many in the US are? Could the problem be from Voltage spikes?
A voltage spike is defined as fast short duration electrical transients in voltage. All electronic and electrical devices are designed to operate within a certain voltage power supply, which is normally written on the product sheet/manual or on the device itself. Voltage spikes can damage these devices. One of the more common types of damage that can be seen is when a bulb is given a supply of power higher than its voltage rate, causing a burn out of its wire or even causing it to burst into flames if there is an over-voltage.

Voltage spikes can happen through natural causes, such as lightning strikes, solar wind and solar flares. A surge in supply within power, phone and signal lines can affect equipment over large areas. A storm that is occurring miles away can induce high voltage spikes in another location. Lightning doesn’t just cause surges when it strikes, lightning between storm clouds can also create magnetic fields that induce surges.

Man-made over-voltage is caused by electromagnetic induction when switching on or off inductive loads (like electric motors or electromagnets). Power outages, tripped circuit breakers, short circuits Electromagnetic Pulses (EMP) with its energy distributed up to 100 kHz in 1 MHz frequency range and inductive spikes. Surges in the power lines can also be generated at the switching station of a local power company. It can also be generated by electrical machinery, appliances and power company operating equipment. Common household equipment can generate 1,000 Volt spikes.

[myousry]

thanks a lot john for your clarification . do you know any UPS that can take the 380V overvolt in order to proctect the pc ,the monitor ,and the coil of the relay
thanks a lot

[Johannescnc]

I am sure they are available. But I recommend being certain where the problem is coming from. Why spend more money than is needed? You may only need a simple surge protection device...
I lived in Florida where storms affected line voltages. An UPS was absolutely necessary because the power lines are mostly overhead and lightning strikes are common. Often the power would be off for an hour or more. But the UPS would give me time to shut down the computer systems until the lights came on again.
But for other equipment, this would not be very cost effective... IMO
That's why I had asked you about your local environment. Dry air is more susceptible to static electricity for example.
Here in Germany, winter air is dry and we need to be careful of static discharge. Most of our power lines are underground so no trouble with lightning. I have not seen a power outage as long as I have been here...

[KenC]

One note on the statics, In my location, I've never encountered static build up (EVER!!!!) until I have my dust collector...

[myousry]

HI guys i received the pump for the Chinese spindle and the flow tx plus in order to monitor the water coolant flow and its temperature. i bought it
from http://www.performance-pcs.com/catalog/index.php?main_page=index

[adel_sebaey1]

well myousry hope u all success

[KenC]

Looks good!

[jayrdwein]

I have a mailbox through a forwarder in US and afterwards he forwards the package to egypt.