Motor Movement Hello, I have assembled a RepRap Prusa Mendel i2. I am stuck up with the electonics, Please Help ! Im using a 450W , 12V SMPS. NEMA 17 and POLOLU A4988. The motors were revolving all fine in the start. But, after a couple of runs, the motors move and stop, move and stop. This process continues, for all the three motors whenever i give an input in pronterface. For Example, If i give an input of 10 towards positive x direction, The motors move towards +x like : Move ( 2 steps ) STOP Move (2steps) STOP ...... And then this continues till it completes the 10 steps. The movement is not continuous. There are regular stops. Please Help . Thanks ! :D https://reprap.org/forum/read.php?1,319120,319120#msg-319120 Mon, 16 Mar 2026 23:03:11 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,319120,321113#msg-321113 Re: Motor Movement https://reprap.org/forum/read.php?1,319120,321113#msg-321113
The problem is set. I changed the power supply.
I use a 12V 30Ah Power Supply now, and everything is working fine.]]> Bharadwaj General Fri, 07 Mar 2014 05:20:00 -0500 https://reprap.org/forum/read.php?1,319120,319510#msg-319510 Re: Motor Movement https://reprap.org/forum/read.php?1,319120,319510#msg-319510
Quote
Bharadwaj
I have tried varying the voltage between the trim pot and the ground of the power supply in the range of 0.4 V to 0.8V
But still, the situation is the same.

What do you exactly mean by 70% of max current of the motor ? Could you please explain the setting procedure for that ?

Only follow this if you have the Pololu A4988, otherwise you need to find the value for your sensing resistors.

http://reprap.org/wiki/Pololu_stepper_driver_board#Tuning_motor_current]]> tjb1 General Tue, 04 Mar 2014 07:16:47 -0500 https://reprap.org/forum/read.php?1,319120,319402#msg-319402 Re: Motor Movement https://reprap.org/forum/read.php?1,319120,319402#msg-319402 But still, the situation is the same.

What do you exactly mean by 70% of max current of the motor ? Could you please explain the setting procedure for that ?]]> Bharadwaj General Tue, 04 Mar 2014 01:00:31 -0500 https://reprap.org/forum/read.php?1,319120,319398#msg-319398 Re: Motor Movement https://reprap.org/forum/read.php?1,319120,319398#msg-319398
But, I have a cooling sink on them, and i am working in an air conditioned lab. So, I guess heating should not be a problem.]]> Bharadwaj General Tue, 04 Mar 2014 00:43:11 -0500 https://reprap.org/forum/read.php?1,319120,319139#msg-319139 Re: Motor Movement https://reprap.org/forum/read.php?1,319120,319139#msg-319139 tjb1 General Mon, 03 Mar 2014 13:57:41 -0500 https://reprap.org/forum/read.php?1,319120,319130#msg-319130 Re: Motor Movement https://reprap.org/forum/read.php?1,319120,319130#msg-319130 cat.farmer General Mon, 03 Mar 2014 13:44:04 -0500 https://reprap.org/forum/read.php?1,319120,319120#msg-319120 Motor Movement https://reprap.org/forum/read.php?1,319120,319120#msg-319120
I have assembled a RepRap Prusa Mendel i2. I am stuck up with the electonics, Please Help !

Im using a 450W , 12V SMPS.
NEMA 17 and POLOLU A4988.

The motors were revolving all fine in the start. But, after a couple of runs, the motors move and stop, move and stop.
This process continues, for all the three motors whenever i give an input in pronterface.

For Example, If i give an input of 10 towards positive x direction, The motors move towards +x like :
Move ( 2 steps ) STOP Move (2steps) STOP ...... And then this continues till it completes the 10 steps.
The movement is not continuous. There are regular stops.

Please Help .
Thanks ! :D]]> Bharadwaj General Mon, 03 Mar 2014 13:23:06 -0500