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  #121  
Old Sat 24 May 2014, 13:41
Tom Ayres
Just call me: Tom #117
 
Bassett (VA)
United States of America
Sorry, I'll try not to say anything anymore.
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  #122  
Old Sat 24 May 2014, 14:05
dbinokc
Just call me: DB #118
 
Oklahoma
United States of America
I apologize if it seemed like I was chastising you. Just making a suggestion.
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  #123  
Old Sat 24 May 2014, 23:05
KenC
Just call me: Ken
 
Klang
Malaysia
did you ground directly from board terminal to your chassis earth point.
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  #124  
Old Sat 24 May 2014, 23:19
Regnar
Just call me: Russell #69
 
Mobile, Alabama
United States of America
Have you tried grounding your dust collection? From the photos it looks like it isnt and if your Z axis proximity switch is anything like the rest of us it might be getting zapped. It also looks very close to the Z motor and X motor.

Just notice that the hose actually gets very close to all those wires on top of your Y car. I would seriously consider running copper wire around the whole thing and grounding it out.

Last edited by Regnar; Sat 24 May 2014 at 23:23..
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  #125  
Old Sun 25 May 2014, 06:11
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
Paulo,
I have had similar issues with my #28 that about drove me nuts.
Some of the detective work may take a while, but it's how I found it on my machine.

Check these things to isolate the issue:
- does it run without issues when spindle off and dust collection off?
- Disconnect the proximity circuit at the control box and check? If so, I had to make an isolated plastic mount to keep Z-axis sensor separate from machine ground.
- check if it runs without spindle physically touching machine...means barrier material between spindle case and z-axis (including mounting bolt)


How i fixed my machine.
- added plastic isolator bushings to my 12mm body proximity sensors
- added 12vdc relay to proximity circuit to put a "dry contact" between the proximity sensor and the PMDX board.


In summary...the proximity sensors have been the induction point for noise on all my machines. The only time I had an issue, was with the spindle machine. Router didn't have enough noise to make it an issue.

Good luck.
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  #126  
Old Sun 25 May 2014, 21:17
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Russell, you touch a good point, my dust pipe is not grounded. I fell already the static on my hands. I'll run a naked wire from outside, It should be OK. I have a bypass on the Z proximity switch, it's waiting for a bracket for long time... is why the static did not gave troubles, yet.

Sean, my machine is running without troubles since I grounded the 12V power supply, it's was floating... so far so good.

Ken, I did the same as the motors power supply, ground the negative black wire to the aluminium heat sink that is the common for all machine, and yes, directly from the board terminal.

Thank you to all.
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  #127  
Old Sun 25 May 2014, 23:55
KenC
Just call me: Ken
 
Klang
Malaysia
Connect to the aluminum heat sink is not the correct thing to do. It should be connected directly to the chassis ground point. I do not have the ability to explain the whole concept in a few words, do read up on "Star ground".
Edit..
I know most will think "what wrong with connecting to a common conductor? Its a chunk of metal & they are suppose to act as one point in theory"" I used to think that way too. BUT that is correct ONLY when everything is peachy..
Ground loop always exist, like everything in life, we can live with it as long as it is not a nuisance. BUT when it cause problem. The easiest & least hassle to tame it is to further reduce the resistance by a low resistance (thick) copper wire to connect to the ground point instead of relying on the chasis or heat sink or other chunk of metal as conductor.

Last edited by KenC; Mon 26 May 2014 at 00:11..
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  #128  
Old Mon 26 May 2014, 05:21
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Following the plan, that heat sink is acting as the "center of the star " and not a branch.
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  #129  
Old Mon 26 May 2014, 06:26
KenC
Just call me: Ken
 
Klang
Malaysia
The heat sink is a good place for the noise. BUT not the best place to place any power supply ground on it.
Another place where think may went wrong without knowing. You house Ground went bad. This is a very common in my part of the world.
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  #130  
Old Mon 26 May 2014, 08:36
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
While it's working, it will stay as is. If I have problems in future I'll come at it again... Thanks for your advice.
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  #131  
Old Thu 29 May 2014, 22:32
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
I was a little reluctant to write this post because I could be misinterpreted. I don't want to prove anything, please see this post more like a disclaimer. Here at the forum, there are a lot of people much more capable than me that I admire and thank them all the help provided.

I did my machine following the plans an directions of the forum. That part of ground/earthing with the heatsink as the central ground point is explained here: http://www.mechmate.com/forums/showthread.php?t=4

But it is not the principal reason of this post, the reason is that: http://www.mechmate.com/forums/showt...6&postcount=23

here you can see clearly that I should NOT have connected the negative of the small power supply to the heatsink, it breaks the isolation of the board.

Maybe put line filters on power input of the VFD to see if I can remove that wire... or check my house ground as pointed by Ken. If somebody has any idea where I can connect the power supply ground without break the isolation of the board, please let me know.

Meanwhile I will keep that ground at my own risk. I do not advice nobody to do it.
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  #132  
Old Fri 30 May 2014, 08:14
KenC
Just call me: Ken
 
Klang
Malaysia
Think Sewage pipe in your house, (done correctly,) the Panel ground point is the last/lowest point of your all drain pipes before it leaves your house. Connecting the Board PSU ground to this point will keep your board isolated from other parts of the circuit. It sounds weird, but that is how its done.
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  #133  
Old Fri 30 May 2014, 22:37
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
just to freshening up air some V-Bit work done
Attached Images
File Type: jpg 2014-05-10 11.21.06.jpg (30.3 KB, 598 views)
File Type: jpg 2014-05-12 10.25.00.jpg (38.6 KB, 599 views)
File Type: jpg unnamed.jpg (31.6 KB, 597 views)
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  #134  
Old Fri 30 May 2014, 23:23
sierra347
Just call me: Armando #110
 
Montgomery, IL
United States of America
Very cool, Paulo did you draw the artwork yourself?
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  #135  
Old Sat 31 May 2014, 03:27
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
Send a message via Yahoo to Robert M Send a message via Skype™ to Robert M
Nicely done.....& like finishing too
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  #136  
Old Sat 31 May 2014, 06:07
darren salyer
Just call me: Darren #101
 
Wentzville mo
United States of America
Very Nice!!
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  #137  
Old Sat 31 May 2014, 06:19
pblackburn
Just call me: Pete #98
 
South-Central Pennsylvania
United States of America
Awesome.
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  #138  
Old Sat 31 May 2014, 07:52
racedirector
Just call me: Bruce #122
 
New South Wales
Australia
Wow, cool mirror surrounds, they really pop with the finishing. Well done Sir!
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  #139  
Old Sat 31 May 2014, 09:49
Alan_c
Just call me: Alan (#11)
 
Cape Town (Western Cape)
South Africa
Send a message via Skype™ to Alan_c
Brilliant, would you mind documenting the paint effect process?
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  #140  
Old Sat 31 May 2014, 10:10
tnarch
Just call me: Tuan
 
Milwaukee WI
United States of America
wow! did you paint the silver then rub on black stain?
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  #141  
Old Sat 31 May 2014, 11:20
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Sure... Practically I designed the artwork but not from scratch. The client bring me the idea with a jpeg drawn. Then, after vectorize it and clean the vectors I play with it: copy, past, mirror, tweaking etc until get the size needed... Also she wanted the two models sharing the design of one of the corners.

the finish was very simple, almost no sanding. Used a very dark stain, 2 hands and finish with rust oleum silver with a brush almost dry, passing very light brushstrokes only on top. the result is like very old metal frames.
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  #142  
Old Mon 02 June 2014, 22:20
tnarch
Just call me: Tuan
 
Milwaukee WI
United States of America
thank you for sharing your techniques.
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  #143  
Old Sat 21 June 2014, 13:30
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Finally got my spindle controlled by Mach3 using brains and Modbus. The VFD is a Mitsubishi FR-D720 but it should work with almost all Mitsubishi drivers. For communications have used a rs-485 PCI card with 4 wires but is possible to use only two wires. The cheap chinese converters did not work. no signal of noise yet

Attached are screenshots and the "brain" I'm using.
Attached Images
File Type: jpg modconfig.jpg (183.7 KB, 430 views)
File Type: jpg modconfig0a.jpg (115.2 KB, 430 views)
File Type: jpg modconfig1.jpg (105.3 KB, 431 views)
File Type: jpg modconfig2.jpg (112.0 KB, 430 views)
File Type: jpg modconfig3.jpg (123.0 KB, 433 views)
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  #144  
Old Sat 21 June 2014, 13:31
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
The Brain did not pass... if you want it, just ask.
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  #145  
Old Sat 21 June 2014, 13:32
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Screenshot of the brain.
Attached Images
File Type: jpg Brains.jpg (94.6 KB, 432 views)
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  #146  
Old Mon 21 July 2014, 15:41
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Nice companion for my machine: a mini wireless keyboard. all you need to do is setup shortcuts as you like and you own a full mechmate remote control. Best $14 dollars spent...
Attached Images
File Type: jpg remote.jpg (30.8 KB, 326 views)

Last edited by parrulho; Mon 21 July 2014 at 15:44..
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  #147  
Old Mon 21 July 2014, 16:30
racedirector
Just call me: Bruce #122
 
New South Wales
Australia
Thats neat Looks like one of those used on HTPC machines? Where did you buy that? I have seen similar locally for about A$26.00
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  #148  
Old Mon 21 July 2014, 19:08
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Yes, it's more used in media centers. That one I bought from ebay:
http://www.ebay.com/itm/321422647882...84.m1439.l2649
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  #149  
Old Mon 21 July 2014, 21:03
racedirector
Just call me: Bruce #122
 
New South Wales
Australia
Cool, I'll grab one for my Raspberry Pi HTPC and my machine at the same time
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  #150  
Old Thu 13 November 2014, 12:54
parrulho
Just call me: Paulo #108
 
willemstad
Netherlands Antilles
Hello people,

No noise, no troubles on my machine. Still going strong. I have replaced the pmdx 122 just to get all inputs working (old board was missing one).

A simple yet good looking, sign for myself. PVC board with no finishing.

Regards,
Paulo
Attached Images
File Type: jpg 20140923_114957_650x500.jpg (56.6 KB, 191 views)
File Type: jpg 20140923_144057_650x500.jpg (58.3 KB, 190 views)
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