Topic: X Sensor Problem
I have a Davanci 1.0a that ran for 300+ hours without a single calibration (https://www.youtube.com/channel/UC0_LYg … VbhuBpPmgg) until I made the stupid mistake of upgrading to firmware to the newest firmware last week.
Apparently that firmware affects the z-axis in such a way that the extruder was too close to the glass. Tried the paper calibration method, and the printer then worked fine with XYXWare but not S3D. S3D ground the extruder across the build plate, while XYZWare printed fine.
Enter stupid mistake number two _ I ran the on-board calibration.
I assume that since I had never calibrated before that the machine had never had reason to move to the extreme back-left/front-left corners, that this calibration either damaged something or cause a previously unknown flaw to come to light.
Here's what I'm experiencing now:
The extruder seems unable to locate and return to x axis home position - attempts to home x axis result in extruder moving 1o mm or so to the left each time a x axis home command is issued. In addition, when calibrating extruder the head will stop on the left-rear corner and on subsequent calibration attempts (at which point the extruder should return home to re-start the calibration routine) the extruder will grind against the left x-axis/rail end-stop instead of moving to the right and returrning to the x-axis home position.
My first thought was that the firmware was the problem, so I successfully upgraded to Repetier .92 _ which, now that I've had a chance to play with, wish I had done a long, long time ago. This made no difference, which would seem to point to a hardware issue.
I've field-stripped the cabinet (for easier access to the wiring), un-zipped tied the cables on the side, and removed the wire loom on the left side. The cables appear a little bent, but not broken or crushed.
What's the next step to troubleshoot this problem?
UPDATE
Ok, swapped the top door optical sensor with the x-axis optical sensor _ made no change. Repetier is reporting X position as -33.00 mm. Each time I tell it to Home X it moves 10 mm or so left, but the displayed x-axis location does not change and stays steady @ -33.00 mm.
