Tagged: grinding sound on Z axis
April 7, 2019 at 6:13 pm #96093
Hey folks – Ordered the MPCNC kit from the store here, everything was working well enough. Couple of test cuts went well. Now I’m having an issue that I can’t explain. Any movement on the Y-Axis of the Mini Rambo results in angry “grinding” sounds from both motors. Moving the connector from the Y-Axis to the X-Axis on the board and attempting to move works fine. Link to a video of what’s going on is below.
Kit I ordered – https://shop.v1engineering.com/collections/parts/products/mostly-printed-cnc-parts-bundle – 6A MiniRambo
Video of my odd grinding noise – https://youtu.be/7p0Vo2kC8rA
The face that the two Y-axis motors turn correctly while on the X-Axis connector, but not on the Y-Axis connector makes me think it’s the board. The X-Axis motors exhibit the same behavior on the Y-Axis connector. Anyone have some advice for me?
Thanks!April 7, 2019 at 8:38 pm #96112
Sounds like a loose connection, maybe try slightly bending the pins in slightly opposite directions for a more positive contact.April 8, 2019 at 3:44 am #96140
Just gave that a try, and wasn’t able to notice any difference.April 8, 2019 at 4:55 am #96144
Recheck the pins. Sometimes they get pushed out of the connectors. That’s the exact sound steppers make when one coil isn’t firing.April 8, 2019 at 5:45 am #96148
I tested continuity from the solder joints on the mini Rambo Y Connector through to the connector on each Y-axis motor, and then between the two motors. No issues found. Those the pins your referring to?April 8, 2019 at 3:23 pm #96237
I was referring to the stepper wiring harness, but sounds like you checked the whole kit and caboodle. What happens if you connect the y steppers to the x port on the rambo?April 8, 2019 at 4:01 pm #96240
It works correctly if I connect Y Steppers to the X Port.
X Steppers also exhibit same failure connected to Y Port.April 8, 2019 at 4:27 pm #96242
So you know it is not the steppers or the ports. That just leaves the wiring. Time to double and triple check them.April 8, 2019 at 6:00 pm #96257
- Everything was working, but now it is not.
- X wires & motors connected to X port, Y wires & motors connected to Y port – X moves fine, Y grinds
- Y wires & motors connected to X port, X wires & motors connected to Y port – Y moves fine, X grinds
Just to be certain, have you checked the fuses on the Rambo?April 9, 2019 at 10:12 am #96382
Pretty sure if it was a fuse it wouldn’t move at all.April 9, 2019 at 11:17 am #96387
I was wondering if there was a higher resistance on the fuse or power to the Y stepper leading to a detrimental voltage drop. Just a thought before diving into troubleshooting the board.April 9, 2019 at 1:17 pm #96404
If you can’t figure it out you can reassign the bad axis to the open driver (in the pins file for your board). I single failed coil on these boards is unlikely but when wired in series you always have a spare.April 13, 2019 at 7:18 pm #96946
Check the solder joint and see if there is insufficient solder on the legs of the connector or a solder bridge. Also, try reloading firmware, maybe a value got changedMay 9, 2019 at 4:39 am #99789
So I have the same issue but on the Z axis (grinding) X and Y work well with the same settings. I tried everything in this post I swapped the wiring and motor from the X axis with no change. Still grinds on the Z even when the motor runs free.
It all points to the board…. or some mystery setting in Marlin (I’m stuck here)
PeteMay 9, 2019 at 7:26 am #99806
Piotr, you should start a new thread and describe in detail you hardware and electronics, and pictures are a very good option for faster help.
You must be logged in to reply to this topic.