X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
Assembled my MK3s and everthing seemed to go smoothly. However, as soon as I powered it on and ran the self test, I ran into issues:
- X-Axis self test always fails.
- I can't seen any obstructions.
- I can hear and see the metal fan screw collide with the lead screw as it hits the left side.
- I can hear and see the plastic body collide as it moves to the right.
- If I run a XYZ calibration, the X-Axis belt starts skipping when it hits the right hand side. Video.
- If I manually move the X-Axis through the settings menu, it claims to only move 205mm from side to side, even though I can clearly measure 250mm with a tape measure (and the heated bed beneath).
- The Y-Axis seems to move an appropriate 212mm.
- The Z-Axis also moves an appropriate 210mm.
What am I doing wrong here? I've tried auto-homing, I've tried calibrating, I've tried self testing.
The make matters more frustrating, the X-Axis belt is fully tensions. I literally have no way of tensioning the belt more, (the screws won't allow it) even though I don't find the belt to be uniquely tight when I check by hand.
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
Your X pulley looks a bit large. Any chance this is your issue?
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
You are amazing.
It is a 20 tooth gear just as you suspected. The math works out as well: 250 * 16 / 20 = 200, which is basically the x-axis distance I was getting.
I checked the y-axis and it is the appropriate 16 tooth pulley.
A new pulley is the mail. Thanks!
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
Glad you're all set! (I just happened to have read that thread before I viewed yours and made the connection...)
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
@mankyd
How did you order the new pulley? I would like to do the same, because I keep getting x axis length error.
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
@mankyd
How did you order the new pulley? I would like to do the same, because I keep getting x axis length error.
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
@mankyd
How did you order the new pulley? I would like to do the same, because I keep getting x axis length error.
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
How did you order the pulley? I am also getting that error.
RE: X-Axis Belt Slipping During Calibration. Can't tension more. Only able to move 205mm according to LCD.
Lots of them available online with a little searching. These were the ones I snagged: https://www.amazon.com/gp/product/B01IMPM44O/ . I also discovered that one of my local computer stores carries them in stock.
Note that I bet Prusa will ship you a new one if you reach out to them. It's up to you what you find easiest.