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Z motors humm and jerk but do not spin.
Posted by jonbroadfoot
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Z motors humm and jerk but do not spin. January 08, 2016 02:36PM |
Registered: 8 years ago Posts: 21 |
Hey guys,
So I just built a prusa i3 and I have the x axis and y axis working. The problem is my Z axis. When I tell it to move it humms and jerks a little bit but won't actualy move. The threaded rods are easy to move and are level. The wiring is definetly correct. The driver is set to the highest output. I even took a stepper motor from my other printer that I know for sure works and it was acting the same way when I plugged it in. Please help.
Thank You,
Jonathan Broadfoot
So I just built a prusa i3 and I have the x axis and y axis working. The problem is my Z axis. When I tell it to move it humms and jerks a little bit but won't actualy move. The threaded rods are easy to move and are level. The wiring is definetly correct. The driver is set to the highest output. I even took a stepper motor from my other printer that I know for sure works and it was acting the same way when I plugged it in. Please help.
Thank You,
Jonathan Broadfoot
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Re: Z motors humm and jerk but do not spin. January 08, 2016 03:06PM |
Registered: 8 years ago Posts: 200 |
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Re: Z motors humm and jerk but do not spin. January 09, 2016 02:45AM |
Registered: 8 years ago Posts: 5,232 |
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Re: Z motors humm and jerk but do not spin. January 09, 2016 02:52AM |
Registered: 10 years ago Posts: 14,672 |
If you have the driver set to the highest output then it is almost certainly overheating. Turn it down to about 1A and connect your two Z motors in series instead of in parallel.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Z motors humm and jerk but do not spin. January 09, 2016 04:44PM |
Registered: 8 years ago Posts: 21 |
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Re: Z motors humm and jerk but do not spin. January 09, 2016 05:19PM |
Registered: 10 years ago Posts: 14,672 |
Quote
jonbroadfoot
The weird part is when I run the test ramps code on my arduino they work fine. So I'm thinking it is something to do with the firmware,.
That suggests that your acceleration and/or speed and/or jerk settings configured in the firmware for the Z axis are too large.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Z motors humm and jerk but do not spin. January 09, 2016 05:45PM |
Registered: 8 years ago Posts: 21 |
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Re: Z motors humm and jerk but do not spin. January 10, 2016 02:42AM |
Registered: 10 years ago Posts: 14,672 |
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jonbroadfoot
Could you possible copy and paste that part of your firmware into here so I could double check what I have compared to you?
You haven't said what firmware you are using. If it is Marlin on Arduino/RAMPS then what you need is settings to put in the Config.h file. But I don't use that, I use RepRapFirmware on Duet electronics, which is configured by a file on the SD card. There is a separate forum section for Mendel-type printers, so I suggest you try asking on that.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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Re: Z motors humm and jerk but do not spin. January 10, 2016 12:18PM |
Registered: 10 years ago Posts: 477 |
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Re: Z motors humm and jerk but do not spin. January 10, 2016 10:48PM |
Registered: 8 years ago Posts: 21 |
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Re: Z motors humm and jerk but do not spin. January 11, 2016 12:07AM |
Registered: 10 years ago Posts: 477 |
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jonbroadfoot
I am using marlin and a ramps board with an arduino
Get Pronterface here:
[www.pronterface.com]
[www.pronterface.com]
Steve
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