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Author Topic: Motor Trouble  (Read 10436 times)

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Motor Trouble
« on: March 28, 2013, 08:58:33 PM »
I too am a newbie (sorry).  I have completed building my own machine, and was advised to buy Xylotex 3 axis Kit (includes: power supply, 3 axis control board, 3 stepper motors, PCI 25 pin ribbon cable, and fan).  When I loaded mach3 and hooked up xylotex system I can get motors to LOCK, but if I try to get motors to move at the right stepper speed 16,000 steps per inch (screw TPI is 10), it locks but loses steps in fact motor doesn't turn.  I have to take the steps per inch down to 1000, velocity to 60, and acceleration to 30.  Then motor turns.  Reading this forum I checked allot of replies, I have now gone from vista on desktop to XP on laptop/w usb smoothstepper.  Again everything works but I can't motor tune stepper motors even close to the tpi per inch.  Motors do lock and lose steps.

Please help me.  Is it the xylotex control board? ???
Re: Motor Trouble
« Reply #1 on: March 28, 2013, 09:11:46 PM »
Once you determine the correct Steps Per, you never change that. It is a constant.
A 1.8 degree stepper (200 ppr), 1/8 micro-stepping through a 10 TPI screw will be 16,000 steps per unit.
Drop you acceleration to 5 and velocity to 30 and try that.
Then you can increase the vel. and accel. until it starts missing, then back off a bit.
Your accell. looks too fast at first glance.
Russ
Re: Motor Trouble
« Reply #2 on: March 28, 2013, 09:14:30 PM »
A 1.8 degree stepper (200 ppr), 1/8 micro-stepping through a 10 TPI screw will be 16,000 steps per unit.

... direct coupled, without any belt/pulley ratio.
Re: Motor Trouble
« Reply #3 on: March 28, 2013, 09:21:37 PM »
Thank You Overloaded  I am only bench testing the steppers motors and at 16000 steps per inch even at velocity to 5 and acceleration 2 still overloads?  unless I take steps down to under 1000
Re: Motor Trouble
« Reply #4 on: March 28, 2013, 09:24:53 PM »
direct coupled
Re: Motor Trouble
« Reply #5 on: March 28, 2013, 09:27:57 PM »
Try changing the Active State of your Step signals.
You can also try increasing the pulse width.
Re: Motor Trouble
« Reply #6 on: March 28, 2013, 09:41:40 PM »
Oh boy!  I feel stupid.  Change active state of step signal?????  Increasing the pulse width????  I think am in trouble.  :-\
Re: Motor Trouble
« Reply #7 on: March 28, 2013, 09:47:47 PM »
The Pulse widths are set on your Motor Tuning screen.
The Active States are set @ Ports n' Pins, Motor Outputs.
Check out the Install / Set-up manual under Support at the top of this page. It should provide gads of help and insight.
But, if you're in trouble, don't hesitate to ask. Always someone here eager to help.
Russ
Re: Motor Trouble
« Reply #8 on: March 30, 2013, 10:33:05 PM »
I check marked active high in motor output, and I believe I've increased pulse rate from 0 to 5 us.  still no movement.  I can not get the motors moving at any velocity at 16000 steps per minute ( velocity 8" per minute ).  What do I do now?
Re: Motor Trouble
« Reply #9 on: April 09, 2013, 09:57:49 AM »
hi overloaded

im zoheir from algeria,

im new both in the forum and CNC field, my question  is simple my step per is 21.91 velocity is 10000mm's/min, so if my plasma cutting system need to move  at 10000mm/min speed, what about feed rate its relation with velocity and its relation with g0 and g1 im very confused please help , English is not my mother tongue.so please excuse my english .

best regards