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Author Topic: Bridgeport Knee Mill Conversion?  (Read 159170 times)

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Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #340 on: July 24, 2016, 05:46:36 PM »
The way I like to connect my drives I/O up is have a short cable from the drive, shielded and preferably twisted pairs and have that going to breakout boards, you can then route from there to wherever they are going with the most suitable cable for the job. For encoders, analogue command etc I always use twisted pair, I have done some without shielding and it works fine but just short lengths and no where near anything noisy or mains voltage.

Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #341 on: July 25, 2016, 05:31:25 AM »
Looks like a simple wiring fault - CS-Labs replied and the shielding is wrong.

My pre-made cable idea has the shield connected to the DB25 shell - this is then grounded via the drive socket. CS reckon that the shield must be isolated at the drive and connected to the ground terminal on the encoder input terminal (25)

I will make up some proper cables when the wire arrives this week ( i ordered some 7-pair stuff) , that should fix it.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #342 on: July 25, 2016, 08:15:20 AM »
Had a reply from CS_Labs re the red flashing encoder numbers - they are not an error message, just a count of every error received from that encoder, it seems they only run from 1 to 255 though but any error is bad i guess so it spits out the "check encoder connection" message.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #343 on: July 25, 2016, 02:34:24 PM »
Good to know what that means Dave :)
Shielding can be weird, on most things you only want one end connected but on the Hiperface encoders that are on some motors if you do not have both ends of the shield connected they will not work, I found that out the hard way :D


Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #344 on: July 25, 2016, 02:41:52 PM »
Their diagram, which i had not seen before as its not in the manual shows all encoder screens connected to pin 25 on the encoder port.

I just been poking about with my trusty Fluke and I have inadvertently connected to encoder shields to mains earth at the drives - probably not the best method ;)

Cable should be here tomorrow, bit of fiddly soldering and things should get better.

Still trying to find ideas for my semi-complex speed control method explained in my other thread ;)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #345 on: July 26, 2016, 02:19:44 PM »
Ok, some success ;)

I replaced the cabling with 7-pair shielded cables and the encoder error counts are now below 50, not zero but they do not seem to change plus i do not get that 'Check encoder connections...." message anymore.

Looks like the counts are only zeroed upon boot up and i only booted it once but at least it seems happy now.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #346 on: July 26, 2016, 02:44:10 PM »
Can't recall seeing any errors at all for the encoders on the Chiron,. maybe just didnt look. Is it on the debug page that you see them?

Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #347 on: July 26, 2016, 02:49:43 PM »
Nah, its on the Plugin Control -> CSMIO monitor screen
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Bridgeport Knee Mill Conversion?
« Reply #348 on: July 26, 2016, 05:15:47 PM »
Ok so just on the General Info page of that rather than the debug page?
Hood

Offline Davek0974

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Re: Bridgeport Knee Mill Conversion?
« Reply #349 on: July 27, 2016, 03:16:46 AM »
Yes the window that opens when you go Plugin Control -> CSMIO

On the left there are the encoder counts, if flashing red then an error was detected, the red number is the error count, it's limited to 255, at some level it triggers the "Check encoder connections..." message but i don't get that any more so maybe only when it hits 255 possibly.

I would guess an error could be a missing pulse or out of sync pulse?
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives