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Author Topic: Mach3 does not respond to jogging or running G-code  (Read 23400 times)

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Re: Mach3 does not respond to jogging or running G-code
« Reply #10 on: October 08, 2011, 08:16:21 AM »
Thanks Hood, however, this does not seem to be the cause of the problem. I have reduced the speed and accelleration as far as they can go. It did certainly change the pitch. I can almost count the pulses but the stepper motors still do not turn. Any more thoughts??

Thanks,
Adrian

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Re: Mach3 does not respond to jogging or running G-code
« Reply #11 on: October 08, 2011, 08:58:53 AM »
Have you got the steps per unit set correctly? also what are they?
What have you got the pulse width set to?
What have you got the kernel set to?
Hood
Re: Mach3 does not respond to jogging or running G-code
« Reply #12 on: October 08, 2011, 10:47:25 PM »
The kernel is set to 25000Hz.

The pulse width and steps per unit I understood, is only relevant for servo motors. Am I wrong about that?  I have left them as they were when I installed the software i.e. 1 step per unit. I am not even sure where to set the pulse width.

Regards,
Adrian

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Re: Mach3 does not respond to jogging or running G-code
« Reply #13 on: October 09, 2011, 02:02:20 AM »
Steps per unit need set to tell Mach how many pulses it will send out to move your motor 1 unit (mm or inch) You will need to work that out. If you tell me what stepping you have the drives set to, what pitch the ballscrews are, whether you are inch or metric setup (default units from Config menu) and any gearing between motor and screw I will tell you what you should have.

Pulse width is on Motor Tuning page and if using the Shinese drives you may need to set this to 5 or more, maybe even need Sherline mode.
Hood
Re: Mach3 does not respond to jogging or running G-code
« Reply #14 on: October 09, 2011, 03:55:40 AM »
I am not to worried about it moving the correct distance for the moment. It would be good to get it to move at all! However, the pitch of the ball screw is 5.0 mm. On the motor tuning page, the steps per is set to 2000 and the step pulse and Dir pulse are both set to 5. The stepper motors are directly mounted onto the ball screws. I hope this is what you wanted to know. Thanks again for your trouble.

Adrian

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Re: Mach3 does not respond to jogging or running G-code
« Reply #15 on: October 09, 2011, 04:09:07 AM »
Also need to know what microstepping you have your drives set to?
Hood
Re: Mach3 does not respond to jogging or running G-code
« Reply #16 on: October 09, 2011, 04:33:13 AM »
Sorry. Not to sure about that. How do I find out?

Adrian

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Re: Mach3 does not respond to jogging or running G-code
« Reply #17 on: October 09, 2011, 04:35:11 AM »
It will depend on the drives you have but if they are Chinese ones then there will be dip switches on them so that you can set the microstepping.
Hood
Re: Mach3 does not respond to jogging or running G-code
« Reply #18 on: October 09, 2011, 05:44:39 AM »
The stepper motors came from Hong Kong so I guess they are Chinese but there are no micro switches. However, I found out from the data sheet that the stepping angle is 1.8 degress. Does that help?

Adrian

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Re: Mach3 does not respond to jogging or running G-code
« Reply #19 on: October 09, 2011, 07:53:12 AM »
No, its the drives I am talking about, the motors are nearly always 1.8 degree (200 steps per rev) but the Drives will have microstepping capability or at least have options for full and half stepping.
Hood