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Author Topic: Buzzing steppers  (Read 20363 times)

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Buzzing steppers
« on: January 03, 2009, 05:38:24 PM »
The latest puzzle....my y and z stepper motors seem to work ok when they are following Gcode but I can't jog with them -- they just give off a loud buzzing noise. Anyone know what the cause might be?
Thanks, Bob

Offline Hood

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Re: Buzzing steppers
« Reply #1 on: January 03, 2009, 05:49:00 PM »
Think you have them tuned too fast, sounds like you are stalling them.
Hood
Re: Buzzing steppers
« Reply #2 on: January 03, 2009, 06:31:29 PM »
Hi Hood,
They were working fine and sounding good at about 40 inches per minute w/ an acceleration of about 30/sec/sec, but I just reset them all the way down to 10 in/min and 6/sec/sec, then all the way up to 60/40, and several stops in between. The result was various tones of horrible.

Offline Hood

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Re: Buzzing steppers
« Reply #3 on: January 03, 2009, 06:33:39 PM »
Can you command a G0 move to them from MDI and they will work?
Hood
Re: Buzzing steppers
« Reply #4 on: January 03, 2009, 06:35:06 PM »
I don't know how to do that, but if you'll give me the steps I will try it.
Bob

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Re: Buzzing steppers
« Reply #5 on: January 03, 2009, 06:39:40 PM »
Go to the MDI page then click on the box beside where it says Input and then type in a move, obviously make sure you can make this move without hitting anything as a G0 move will be at full speed that you have set in motor tuning. What you want to enter is something like G0Y2 then press the enter key, your axis should now move to Y2 at full rapid.

Hood
Re: Buzzing steppers
« Reply #6 on: January 03, 2009, 06:46:18 PM »
They moved but they sounded terrible.

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Re: Buzzing steppers
« Reply #7 on: January 03, 2009, 06:49:26 PM »
ok so its either overtuned motors or maybe your drives or the power supply. Try commanding a G1 move now and see how fast you can manage to get them going, for example try a G1Y2F10 and see if they move. If you have a voltmeter check out the power supply to your drives while you have a motor moving to see if it drops away significantly.
 One other thing to try is see if you have enhanced pulsing enabled, its on General Config page from Config menu.
Hood
Re: Buzzing steppers
« Reply #8 on: January 03, 2009, 06:56:10 PM »
No volt meter, but checked Config and the Enhanced Pulsing is enabled. The G1X2F10 moved very slowly and made a clicking sound.

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Re: Buzzing steppers
« Reply #9 on: January 03, 2009, 06:59:02 PM »
Are you set up in inches or mm? If you are in inches it should have moved at 10 inches per min, if in mm it should have been 10mm per min.
Can you copy and rename your xml and attach it so I can have a look.
Hood