INVENT3D
TM
Printer Operating Instructions and Troubleshooting Guide
AST2 © 10/26/16
Page 34
wires. Attach the replacement wire to the appropriate limit switch, exactly as they were.
Connecting the wires to the wrong pins or in the wrong order will result in a non-operating
limit switch. Run the wire through the wire sleeve, and plug into the appropriate port on the
RAMBo board. Replace the zip ties as needed. Ensure that there is sufficient slack in the limit
switch wire between the limit switch and wire sleeve such tension is not placed on the wire
due to either the horizontal motion of the hot end or vertical motion of the Y-axis plate. Hold
the slack in place using a zip tie.
Y-AXIS GRINDING
Problem
: Grinding when raising the y-axis subassembly on the lead screw
Probable Cause 1:
Z-axis lock engaged
Remedy
: If there is a loud grinding noise as the Y-axis subassembly is being raised on the
lead screw when starting a print, the Z-axis lock may be engaged. Disconnect the power to
the printer and loosen the yellow thumbscrew on the Z-axis lock so that the lead screw knob
can spin freely. Re-connect the power and attempt to print again.
Probable Cause 2:
Improper alignment of lead screw and/or ACME nut.
Remedy
: Repeat the process to align the z-axis lead screw and embedded ACME nut.
Probable Cause 3:
The Z-axis knob is grinding on top plate or Z-axis bearing is not properly seated.
Remedy
: Loosen the screw in the knob, then reset the bearing and height of knob.
