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Author Topic: New Guy . . . Old problem??? - motors not turning  (Read 27939 times)

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Offline JEEPLESS

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  • 16 16
Re: New Guy . . . Old problem??? - motors not turning
« Reply #10 on: February 20, 2009, 06:00:29 PM »
I do see the drop to 0V  (.1) when I jog the other way.  Is there an advantage to running the system w/ enabled drivers?  The manual for the drivers says they do not need to be enabled.  I was trying not to change too much of the original wiring, but I don't have a problem doing so if needed. 

I will trace the 5VDC to the drivers.  I suspect that it is the wiring between the combo board and the drivers - the motors will operate when the drivers are set to test mode (1/2 turn each direction). 

Would motor tuning have any effect at this point?  I figured that if I have no reaction from the motors at all, they are not getting the signal.

Thanks again for your help.

Matt
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Offline JEEPLESS

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  • 16 16
Re: New Guy . . . Old problem??? - motors not turning
« Reply #11 on: February 20, 2009, 06:08:00 PM »
Hood,

Here is a down and dirty drawing of my wiring.  LPT-1 pin 1 and 14 are limit switches.  LPT-2 pins 1 and 14, and pins 16 and 17 are the other sets of limit switches.

Matt
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Offline Hood

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  • 25,835 25,835
  • Carnoustie, Scotland
Re: New Guy . . . Old problem??? - motors not turning
« Reply #12 on: February 20, 2009, 06:32:26 PM »
Looks ok but would have to read the combo manual.
Hood
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Offline Hood

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  • Carnoustie, Scotland
Re: New Guy . . . Old problem??? - motors not turning
« Reply #13 on: February 20, 2009, 06:37:24 PM »
What voltage is the drives Step and Dir power and where are you getting it from?
Hood
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Offline JEEPLESS

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  • 16 16
Re: New Guy . . . Old problem??? - motors not turning
« Reply #14 on: February 20, 2009, 10:43:11 PM »
Should be 5VDC as well.  It is coming off the CNC Crafter power supply that is original to the system.  That supply line should be fine, as it has not changed and the test mode of the drivers functions correctly. 
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Offline Hood

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  • 25,835 25,835
  • Carnoustie, Scotland
Re: New Guy . . . Old problem??? - motors not turning
« Reply #15 on: February 21, 2009, 05:23:41 AM »
Yes I have no doubt that it is fine but I am thinking it will not be referenced to  your step and direction signals, usually you take the power from the breakout.
Hood
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Offline JEEPLESS

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  • 16 16
Re: New Guy . . . Old problem??? - motors not turning
« Reply #16 on: February 23, 2009, 11:19:14 AM »
Hood,

That appears to be the problem.  I tested on one of the drives and it appears to function properly.

Thank you for your help and patience.  I may need some further help tuning motors . . . I'll let you know.


Thanks again,

Matt
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Offline Hood

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  • 25,835 25,835
  • Carnoustie, Scotland
Re: New Guy . . . Old problem??? - motors not turning
« Reply #17 on: February 23, 2009, 04:52:08 PM »
:)
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BClemens

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Re: New Guy . . . Old problem??? - motors not turning
« Reply #18 on: February 23, 2009, 05:02:38 PM »
Hey Hood,

 Between you and Ray L., there's some very good reading right here! No doubt about it - good information! And you make it seem easy!!!

Bill C.
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Offline JEEPLESS

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  • 16 16
Re: New Guy . . . Old problem??? - motors not turning
« Reply #19 on: February 26, 2009, 05:02:53 PM »
Professor Hood -  ;)

I have spent some time trying to get the motors tuned up and am having problems calibrating the system.  I have tried both calculating steps per unit and using the automatic setup in Mach 3.  I set inches as my native unit.  When I have the X axis move 1 unit it only moves 9/16".  I click OK and have Mach 3 adjust the steps and repeat the process getting the same result.  All three axis respond the same. 

I went to motor tuning and put in a value of 10000.  I then went to the MDI set the DRO for X axis to 0 and entered G0 X10.  The axis moves 1 - 9/16".
My Applied Motion drivers are set for a 2000 S/R resolution.  The resolution of my stepper motors is 200. 

Thanks again,

Matt
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