Stepper motors vibrating

valesco
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Joined: Sat Feb 22, 2014 12:55 am

Stepper motors vibrating

Post by valesco » Sat Feb 22, 2014 2:54 am

I just a finished assembling the Shapeoko 2, I tested the motors before assembly as instructed and everything worked normally. After assembly, I wired everything the same way and when testing the correct motors vibrate when tested, but almost none spin and they just vibrate, the correct motors vibrate though. The arduino came loaded with grbl settings different from the wiki settings so I converted them to these:


Image


I am not sure if I converted the settings before or after testing out the motors, so it could be one source of the issue, but seems more like a power issue getting to the motors. Any ideas?

Thanks

WillAdams
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Re: Stepper motors vibrating

Post by WillAdams » Sat Feb 22, 2014 10:16 am

Adjust the current: http://www.shapeoko.com/wiki/index.php/ ... or_Current

Might be you have the belts too tight, but that's remote.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

Nigel K Tolley
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Re: Stepper motors vibrating

Post by Nigel K Tolley » Sat Feb 22, 2014 11:01 am

The other option is you've got the phases mixed up. Check your coils are the right way around. Swap any two wires on a coil. It could well be one coil going CW and the other driving CCW.

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danimal
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Re: Stepper motors vibrating

Post by danimal » Sat Feb 22, 2014 1:56 pm

If one of the phases is wrong, all of the other axis do exactly as you describe. I would recommend doing a resistance check and verify that the coils are wired correctly one more time. I just had this happen to me the other day when I upgraded to nema 23's. I was sure they were right, and I bet that I have wired and unwired those motors 100 times but I still managed to swap the two center wires on one of the terminals on the GRBLshield.

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Shapeoko # 1458

RT0701C Spindle || dual y motor || x axis nema23 with custom carriage 1000mm length || z axis nema23 linear rail upgrade with 1/2-10 ACME

quadrabyte
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Joined: Sun Jun 08, 2014 5:13 pm

Re: Stepper motors vibrating

Post by quadrabyte » Sun Jun 08, 2014 5:39 pm

I have X and Z motors working fine. The Y pair just vibrate.
- I double checked that I have the wiring right.
- If I connect only one at a time to the Y driver it works fine.
- Power supply is providing 24 VDC

Looks like it might be either insufficient current or perhaps a pulse width issue?

Any suggestions?
Shapeoko #5421

WillAdams
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Re: Stepper motors vibrating

Post by WillAdams » Sun Jun 08, 2014 5:44 pm

If it's insufficient current have you tried adjusting the current?

http://www.shapeoko.com/wiki/index.php/ ... he_Current
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
Nomad 883 Pro #596 (bamboo)

SmokyRick
Posts: 168
Joined: Sun May 11, 2014 7:22 pm

Re: Stepper motors vibrating

Post by SmokyRick » Sun Jun 08, 2014 10:52 pm

Mine did that after I plugged the gshield into the Arduino in the wrong holes. Replaced Arduino and all is well now. Had gshield plugged in 1 hole off from where it should be.

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Smoky Rick Crawford in the middle of Northern Illinois, USA.
ShapeOko2 s/n 5200 all stock. Arduino, gshield, Grbl Controller, Autodesk Fusion 360.
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arjan
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Joined: Mon Jan 20, 2014 12:05 pm

Re: Stepper motors vibrating

Post by arjan » Tue Jun 10, 2014 11:24 pm

Same here. Check the cable, you probably missed one. Mine vibrated too! Fixed after rewireing

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PaulKruger
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Joined: Wed Feb 26, 2014 7:28 pm

Re: Stepper motors vibrating

Post by PaulKruger » Sun Jun 22, 2014 8:28 pm

Same problem. X Axis vibrating between CW and CCW. I have tried all combinations on the driver terminals and nothing changes. Can someone post what the resistances should be between the wires so I can check the motor?

UPDATE

Now my Y Axis motors are also vibrating. Awhile ago they responded to the manual control correctly and I could send the gantry forward and rear word ok. No changes were made to those wires while working on the X axis problem. They just stopped working correctly.

Thanks.

cvoinescu
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Re: Stepper motors vibrating

Post by cvoinescu » Sun Jun 22, 2014 8:41 pm

Most stepper motors have red, blue, green and black wires, and you should measure the coil resistance (a few ohms, see the motor's datasheet) between red and blue, and the same resistance between green and black. Any other combination (e.g. red and black) should measure open circuit.
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