Circles are oblongs. Same with letters. Straight lines seem fine. Any ideas? [IMG_0756] [IMG_0755]

Solved: Apparently when the controller is turned on there is some low level current flowing to the motor, which makes it very difficult to manually turn the arbor. Yes, the left y-axis stepper was unplugged. I’ll just leave now.

Most likely this: [image] Red Bushings on Motor Coupler. What is it? (Do not throw away) FAQ Troubleshooting The Red Bushings (shaft coupling) on the motor coupler are not packaging. They are an integral part of the coupler and required for the machine to move…

I disnt discard the bushings, but I do t recall ever seeing them. red seems noticeable. Would wear cause the problem? How many do I need to replace them?

No, they would not wear, but that carve looks exactly like they are not installed.

Pretty sure this shouldn’t be happening. I can easily rotate the left Y-ball screw manually. The left end of the gantry then moves about an inch. Is this the bushing issue?

I doubt it’s the same, but I had an issue with circular pocket skipping steps. It ended up being a software setting. Just throwing it out there: Help with gcode and skipped steps (solved, max deviation)

I’m 100% certain my issue is the loose bar. Given that those bushing are part of the connection to the stepper motors this is probably the answer. Just waiting for 1F confirmation. And info on how many I need to buy to replace all.

What is a “loose bar”? You can easily check if you have the motor couplers by removing the motor and remind the coupler.

“loose bar” refers to the long ball screw that has way too much play in it. The thing that is turning between my fingers in the posted video. I’m curious how my machine could be missing these bushings as it came with the stepper motors attached. Nevertheless, it makes sense if the cut resembles t…

Update: I removed both y-axis steppers. Both had the red bushings installed, but the stepper on the left (side with too much play) spins almost freely, and the stepper on the right offers much more resistance when I turn the shaft. I don’t know what a stepper is supposed to feel like, but I do und…

I just upgraded to the 1Felite journeyman. While surfacing my spoil board I continue to motor failures. I have attempted to decrease the size of my servicing from 32 x 48. I reduced it a half inch length and width and I continue to get the failures. I have reset and attempted at least six times, ho…

What could be causing this

Original/PRO Series (Buildbotics) (Gen 1)

OnefinityCNC (Onefinity CNC Official ✅) March 8, 2024, 5:54pm 2

Most likely this:

Topic		Replies	Views
Red Bushings on Motor Coupler. What is it? (Do not throw away) FAQ Troubleshooting	0	625	January 2, 2024
Circle a bit deformed Troubleshooting (X35/X50)	8	182	February 22, 2025
Y motor coupling not tight on arrival Troubleshooting (X35/X50)	12	1528	April 15, 2021
Gantry Stuttering (solved, loose motor coupler) Elite Series (Masso & Redline) (Gen 1)	3	361	June 6, 2024
Y Locking up after a few successful cuts	4	821	June 1, 2021

What could be causing this

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