After a year of discreet printouts with this Prusa I3 Pro B suddenly it no longer works.
So as not to get lost in chatter, here are the problems.
1) At the power on, the 3d touch repeated the cycle, "down, up" only twice and then stopped. after weeks of tests, firmware, etc I decided to remove it and go back to the original microswitch.
2) I have updated the firmware to 1.1.9 easy ad clean.
3) I leveled the pot in 9 points, test home for all axis. Microswitches All ok.
Problem: printing starts beyond the plate. Looking in front of the printer, at 20 clock position and goes below the Z altitude ignoring the microswitch.
Two whole weeks of reading forums, discussions, tests ... but nothing. I bought four new A4988 but, cannot even know the correct voltage with which to set. On forums i've read 30 different voltages and different formulas to calculate it
I have two choices: destroy it with a hammer or set it on fire.
