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Author Topic: newbie - help needed please  (Read 6365 times)

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Offline Hood

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Re: newbie - help needed please
« Reply #10 on: March 03, 2012, 04:52:26 PM »
 The wiring diag seems to show that a power supply should be connected to the BOB at the connectors next to the E-Stop.
Hood
Re: newbie - help needed please
« Reply #11 on: March 03, 2012, 04:56:24 PM »
Hi there,

I tried 2-3, 2-4,2-5...2-17 and they all gave the same result as the "correct" 2-14: slow, irregular steps (about 2 Hz)

any suggestions?

many thanks

Thomas

Offline Hood

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Re: newbie - help needed please
« Reply #12 on: March 03, 2012, 04:58:23 PM »
What do  you have the drive microstepping set to?
Do you have the motors connected to a machine or are you just bench testing?
Hood
Re: newbie - help needed please
« Reply #13 on: March 03, 2012, 05:12:04 PM »
I am test benching: microsteps at 400/rev (0.9 degrees),nothing connected to the motor.

power supply can either be 5V near the Estop, or USB.

Just tried with 5V... now I am getting confused. With the 5V-non-USB, the stepper does not work, but the very small led next to the X connector block still blinks a bit.
Now I went back to USB powering, I get the same -no stepper, small led blinking.... restarted Mach3... same, now the stepper does not even stutters...

Offline Hood

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Re: newbie - help needed please
« Reply #14 on: March 03, 2012, 05:35:21 PM »
That is the problem with these Chines boards I am afraid, documentation is pathetic and there seems to be lots of similar boards but all with different setup, its just all trial and error.

If you have 400 steps per rev set on the drive I would set that in motor tuning.
Hood
Re: newbie - help needed please
« Reply #15 on: March 04, 2012, 05:00:39 AM »
I did change "step per" to 400 for the X-axis in the Motor Tuning... I get small irregular steps, like before...

very frustrating! Don't know what do do nest...

many thanks

Thomas

Offline Hood

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Re: newbie - help needed please
« Reply #16 on: March 04, 2012, 05:03:27 AM »
Have you tried it in Sherline mode?
Hood
Re: newbie - help needed please
« Reply #17 on: March 04, 2012, 05:09:37 AM »
Good morning Hood - I's sorry but I don't know what Sherline mode is... newbie!

Also, noticed that in Motor Tuning, Step Pulse and Dir Pulse were both at 0 uS...
changed Step Pulse to 4 or 5 - now the stepping is much better and regular, but still slow, and there are lot of vibrations...

getting there... maybe...?

thanks

Thomas

Offline Hood

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Re: newbie - help needed please
« Reply #18 on: March 04, 2012, 05:13:00 AM »
Yes I saw that in your xml and suggested you try 10. If it is working better with 4 or 5 then it may be you need even wider pulse. I would try Sherline mode rather than just increase on Motor Tuning page as that will give a half width pulse which is the most you can get. Sherline mode is enabled from the main page of Ports and Pins, you will likely need to restart Mach after you have enabled it.
Hood
 Hood

Offline Hood

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Re: newbie - help needed please
« Reply #19 on: March 04, 2012, 05:16:11 AM »
Oh also 400 setting you have your drives set to is not really ideal as that is only half stepping, much better to set to 2000 (1/10 microsteps) if your drives allow.
Hood