How much too large are your parts? Are they too large in X,Y and Z or just one direction?
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It is frustrating. At times they are off by .5mm other times they are too small. I went through, cleaned, and tightened everything. Hopefully that will help even though I didn't find anything loose.
Parts is still do not have a finished appearance. I'm going to try some different filament. Maybe that may help.
Unless you need the heat resistance I would recommend switching to PLA, it prints much better than ABS in my experience. The only ABS I have tried though was two rolls that I bought with the printer kit so different ABS may print better than what I got with the printer.
Do I need to add part cooling fan for pla?
So I finally was able to get around to set up my ABL. Everything is hooked up with servo and working fine to find the position for the servo arm. So when I go to home the x or y axis it moves away from the enstop. But in proterface all the axis move in the right direction. I am using tsteever's frimware he uploaded.
Hmm, wish I could help more. What happens when you home using the lcd? How about safe homing? Do you have that enabled?
So its only the x axis that moves the wrong way. If I tap the endstop with my finger it will stop while moving. Everything else works fine y axis moves the right way and the probe arm for the z ABL drops and homes perfect.