Y-axis calibration failure, new kit
I just finished building my Core One kit, and the Y-calibration test failed. The belt tension is correct, and there is no gap on either side of gantry. I can move the gantry backwards and forwards, and both sides hit the ends at the same time. Perfectly aligned.
And yet, the Y-calibration is failing. I read in a lot of places that the T16-2GT geared pulleys might be inverted. How can I tell if they are?
Here's the left (X-Axis) assembly:
And here's the right (Y-axis) assembly:
Does this look right? Also, could someone post a video of what a successful Y-axis calibration looks like? I can only find videos of failures on Youtube.
Best Answer by TT:
I think I figured it out. I just needed a fresh look.
What I didn't understand is that the tensioner pulleys need to be retracted deep enough so that the gantry does not touch them. The gantry needs to touch only the motor mounts.
But if the belts are already pretty tight, then you will not be able to loosen them enough to pass the belt tightness audio test.
So my real problem is that belts are inserted too much into the Nextruder holder (step 5.51). Loosen them by 1 or 2 notches will allow me to retract the pulleys enough and still pass the tightness test.
RE: Y-axis calibration failure, new kit
I've noticed that the failure X appears immediately when the gantry hits the rear of the printer. The Y-axis range is apparently -19mm to 210mm, so if there's an obstruction, I don't see it.
RE: Y-axis calibration failure, new kit
Did you check if the cable of the sensor behind the right handle is interfering with the gantry's movement?
This is a case where I would contact support via chat... it may take a long time but they usually manage to fix this kind of things...
For *any* problem with a new printer or a new kit-build it is always best to go to Prusa Support via the Chat option; you will need your printer's serial number.
Cheerio,
RE: Y-axis calibration failure, new kit
Did you check if the cable of the sensor behind the right handle is interfering with the gantry's movement?
This happened to me. Turn the printer off (so the motors can free-spin) and slowly move the gantry along the same path it takes when it performs the Y-axis calibration (from the front-right corner to the back right-corner). Feel for any resistance at any point. Ensure the gantry isn't touching/squeezing/interacting with the sensor cable between the right handle and the back of the printer.
RE: Y-axis calibration failure, new kit
I think I figured it out. I just needed a fresh look.
What I didn't understand is that the tensioner pulleys need to be retracted deep enough so that the gantry does not touch them. The gantry needs to touch only the motor mounts.
But if the belts are already pretty tight, then you will not be able to loosen them enough to pass the belt tightness audio test.
So my real problem is that belts are inserted too much into the Nextruder holder (step 5.51). Loosen them by 1 or 2 notches will allow me to retract the pulleys enough and still pass the tightness test.
RE: Y-axis calibration failure, new kit
There are indeed a few comments in the building notes on how many "teeth" of the belts need to be inserted in the holder. It is probably worth leaving a comment in the appropriate building step along the lines of "if you insert too may teeth this may happen:..."