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  #1  
Old Wed 30 July 2014, 16:19
wiifm
Just call me: Dennis
 
Cairns
Australia
wiifm's plans for building in Brisbane

Hi to everyone from Brisbane.

I recently downloaded the plans and have been reading all the Builder's threads so I can pick up as many tips as possible and create a shopping list. I must say I've got a lot to live up to if I'm to maintain the quality of MM builds in Brisbane

The electrical side of the build will be most challenging for me, so I am sure I will be asking lots of questions.

I've promised the boss I will finish a couple of projects around the house before I start this one, however I couldn't resist making one purchase

http://www.ebay.com.au/itm/321442545...84.m1439.l2649
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  #2  
Old Fri 01 August 2014, 05:44
Tom Ayres
Just call me: Tom #117
 
Bassett (VA)
United States of America
You've made a good purchase, My 'Boss' had me stop many times but if you're diligent the 'Boss' lets you slip in a little build fun. Welcome and happy building.
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  #3  
Old Sat 02 August 2014, 22:01
pblackburn
Just call me: Pete #98
 
South-Central Pennsylvania
United States of America
Questions are definitely better than assumptions.
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  #4  
Old Sun 10 August 2014, 22:15
jude
Just call me: Jude #48
 
sydney
Australia
Dennis I have created a shopping list for electronics and steel in my build pages (MM#48) and have copied the electronics order here. Prices have probably changed a little but all the suppliers are still around.



Mech Mate Electronics Order, RS Components number and prices at September 2009

Transformer, 625VA, 2x40VDC, 223-8320, $169AUS

Diode, 35A, 1000V, 629-6358, $9.20

Capacitor, 100V, 22000uf, 381-9144, $55

Contactor Relay, 243-7410, $60.10

Disconnect Switch, 12A, 3 Pole, 433-9841, $79.70

Pause and Resume Switches, 318-878 & 318-856, $31 x 4

Steel Wall Case, 500mmx 400mmx 200mm, 207-7333 $233
(a slightly bigger case would be better)

Chassis plate for Case, 207-7478, $34.30

Belden CY type Cable, 4G, 1mm, 50m roll, 628-2264, $172
(This cable is a fair bit cheaper than the Lapp brand)

Cable Chain, Igus 62.5mm x 39mm, 75R, 236-4946, $57.80 pm x 3

Bootlace Furrule Kit, 513-2540, $24.20

Printer Cable extension, 6m, 480-557, $10.40

Crimp Connectors, 240V Spade, 534-351, $36 per 100

PMDX-122 Breakout Board from Practical Micro. with shipping, $116

Stepper Motors 4 of, and 4 Drivers from Motion King,with shipping, $967.08

The Crucial Bootlace Furrule Crimper (rachet type) I purchased at Altronics for about $50.
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  #5  
Old Sun 10 August 2014, 22:56
wiifm
Just call me: Dennis
 
Cairns
Australia
Hi Jude,

Wow thanks for the list!

I haven't done enough reading yet. I've got to admit, I've struggled just to do the calculations for the transformer given the motors I am purchasing.

I am considering going with the PMDX 126 BOB and the PMDX 134 board with Gecko 203v drivers and an Ethernet Smoothstepper.

Thanks again for pointing me in the right direction.
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  #6  
Old Tue 12 August 2014, 01:37
wiifm
Just call me: Dennis
 
Cairns
Australia
Motors arrived

So the motors arrived today.

Is anyone able to tell me how to test the motors? I have a multimeter, so am able to measure... just don't know what it is I should be measuring
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  #7  
Old Tue 12 August 2014, 09:27
Richards
Just call me: Mike
 
South Jordan, UT
United States of America
We'll need a little more information before being able to help you test your motors. Are they hooked up to the stepper drivers? Are the stepper drivers connected to the power supply and to the PMDX breakout board? Do you have Mach 3 installed?
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  #8  
Old Tue 12 August 2014, 14:42
wiifm
Just call me: Dennis
 
Cairns
Australia
No, no and no
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  #9  
Old Tue 12 August 2014, 15:58
technogod
Just call me: technogod
 
bakersfield
United States of America
Good luck with your steppers.you need a tester like this
http://www.ebay.com/itm/Stepper-Moto...item417987118f
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  #10  
Old Tue 12 August 2014, 18:56
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
Dennis, assuming you have 4 wire motors, just take two motors and wire them to each other, matching the lead colors. Then turn the shaft of one, and watch the shaft of the other turn to match. You'll have reinvented early bridge to engine room signalling.

Beyond that, you'll want to wait until you have drivers to test with.

If they are six or eight wire motors, it's a little more complicated; you need to figure out which four wires to use.

In all probability, there's nothing to test though. Modern steppers are pretty reliable beasts.
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  #11  
Old Wed 13 August 2014, 00:15
wiifm
Just call me: Dennis
 
Cairns
Australia
The PK299-45A motors are 8 wire. I was hoping there might be a method to measure resistance between pairs to discover if anything is not right. Looks like I will just have to wait until I get the bits together for the kitchen table project.
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  #12  
Old Wed 13 August 2014, 01:56
KenC
Just call me: Ken
 
Klang
Malaysia
Read.
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  #13  
Old Wed 13 August 2014, 08:50
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
See here: http://catalog.orientalmotor.com/bro...&assetid=26061

You should see the same resistance on each of the four windings. Choose an A phase and a B phase winding to get the four wires to do the back-to-back test above. Then use the other set of four wires to test the other half of the motor windings.
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  #14  
Old Wed 13 August 2014, 08:50
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
Brad...I was just clipping the link and you popped up!
Cheers buddy!
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  #15  
Old Wed 13 August 2014, 09:12
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
Sean, always a pleasure to bump into you. Hope all is well down there.

One last note on testing the motors: if you short circuit a winding, you'll feel the resistance when you try to spin the shaft. This is both a good quick test of the windings, and a way to confirm or sort out which wires are on the same winding if you have no measuring tool or wiring diagram available.
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  #16  
Old Wed 13 August 2014, 16:40
wiifm
Just call me: Dennis
 
Cairns
Australia
Hi Brad and Sean,

Thanks for your help! I measured resistance across pairs and all matched. I was also able to detect voltage across pairs when the shaft was turned by hand.
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  #17  
Old Thu 14 August 2014, 05:50
Surfcnc
Just call me: Ross #74
 
Queensland
Australia
Hi Dennis

Brad and Sean know their stuff, good names to remember if one was to think about building a CNC machine

Welcome to the Mechmate forum.
Read as extensively as you can.
This site puts the whole CNC journey together in such a way that you can grow along with the project.

Good luck
Ross
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  #18  
Old Thu 14 August 2014, 06:02
wiifm
Just call me: Dennis
 
Cairns
Australia
Hi Ross, I've read your build thread from start to finish more than a few times Thanks for the advice.
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  #19  
Old Mon 01 September 2014, 05:21
wiifm
Just call me: Dennis
 
Cairns
Australia
Just a quick update. I've been accumulating bits and pieces. Laser cut parts from Rick (rnixon) have arrived I am planning to do the same belt reduction as Metalhead, so purchased the extra plates. Not sure how it will work on the Z axis. More contemplation required.




The postman has been busy over the past few weeks.

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  #20  
Old Mon 01 September 2014, 18:22
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
...well that is a nice assortment of bits!
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  #21  
Old Sat 06 September 2014, 12:09
pblackburn
Just call me: Pete #98
 
South-Central Pennsylvania
United States of America
Well on your way.
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  #22  
Old Tue 03 July 2018, 20:47
wiifm
Just call me: Dennis
 
Cairns
Australia
Pulling this thread from the depths

So most of the steel for the main assembly arrived this week along with steel for another job I am doing.

Knocked up a small cutting bench for the cold cut saw with a couple of roller stands and will start cutting now.

As you can see, there is not much room in the shed at the moment, but I hope to rectify that situation over the next couple of weeks.
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  #23  
Old Wed 04 July 2018, 05:47
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
Welcome back, Dennis. I see a MechMate in the making.
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  #24  
Old Fri 06 July 2018, 08:49
ayetti
Just call me: Alex
 
SLO california
United States of America
Nice!! Glad to see you moving forward. I can relate to the cramped space problem, looks like your keeping organized
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  #25  
Old Fri 06 July 2018, 18:14
wiifm
Just call me: Dennis
 
Cairns
Australia
Quote:
Originally Posted by ayetti View Post
Nice!! Glad to see you moving forward. I can relate to the cramped space problem, looks like your keeping organized
LOL! I have a tendency to hang things up on the floor, then can't find them next time I need them!
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  #26  
Old Mon 06 August 2018, 23:26
wiifm
Just call me: Dennis
 
Cairns
Australia
A few more electrical parts arrived in the past week or so, so I decided to start my own version of the 'kitchen bench' project.

Part of that was just figuring out the decisions I had made in some of my purchases at the beginning.

For my own records:
After going through the CalculatedPowerSupply spreadsheet and the PK299-F4.5A stepper motor specs, combined with the power supply I have in front of me (Antek Industries PS8N63N24R5), it looks like I decided to wire the motors in Bi-Polar Parallel.

I have the mains latching circuit working and powering the power supply. Now time to connect the PMDX126
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  #27  
Old Wed 08 August 2018, 02:09
wiifm
Just call me: Dennis
 
Cairns
Australia
Well after some confusion, a lot of reading and a few trials and tribulations, I have the stepper motors turning with Mach4, ESS, PMDX 126, PMDX 134.

In the beginning, I had a faulty cable between the 126 and the 134, but in the process I discovered I had 4Ohm resistors instead of 40kOhm resistors for the Geckos.


I feel happy now that I have the basics sorted and can add features as I go from here.
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  #28  
Old Sat 11 August 2018, 05:56
MetalHead
Just call me: Mike
 
Columbiana AL
United States of America
So you had a bad 25 pin ribbon cable between your 126 and 134 board? Did this cable come from PMDX with your parts? If so I want to let them know they may see others since Davey also had this issue.
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  #29  
Old Sat 11 August 2018, 17:06
wiifm
Just call me: Dennis
 
Cairns
Australia
@Metalhead, I dont remember. I bought these parts back in 2014.
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