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New machine with a goofy problem
« on: July 31, 2013, 07:30:27 PM »
Hello all. New machine up and running just recently. Full zero backlash ballscrew 10x10 4axis. Everything is running nice and smooth with the pendant when I am jogging the motors slow.
When I jog the motors fast or try and run a program in Mach, I get only the Y axis moving backwards about 5-% of the time. So here is the thing that has me stumped. The mechanics of the X and the Y are exactly the same with the exact same screws, motor, and setting in the motor moving pull down. I have used Mach in the past but been out of the game fora few years.
Lots of awesome info on this board and lots of helpful people in the community. Anyone out there in cnc land ever ave this issue? I am using a Sainsmart 4axic board, same as on my CNC lathe and it works great on there. Running the motors at 1/8 stepping for the time unti I get a Gecko G540 here in the next few weeks.
The X carries the Z column and the spindle and the Y carries just the aluminum base plate. The X def has more stuff to move.
I am puzzled!!!

Thanks in advance..

DT

Offline Tweakie.CNC

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Re: New machine with a goofy problem
« Reply #1 on: August 01, 2013, 01:44:47 AM »
Sometimes those TB6560 boards work OK sometimes they don't.  :'(

When you upgrade to the Gecko you will have no problem.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.

Offline ger21

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Re: New machine with a goofy problem
« Reply #2 on: August 01, 2013, 07:47:11 AM »
Try increasing your pulse width to about 15 in motor tuning.
Gerry

2010 Screenset
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Re: New machine with a goofy problem
« Reply #3 on: August 01, 2013, 10:38:43 PM »
Where is the place to make that change?

Thanks

Offline Hood

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Re: New machine with a goofy problem
« Reply #4 on: August 02, 2013, 02:46:19 AM »
Motor tuning page.
Hood