BobsCNC REVOLUTION, Assembly Manual

Page: 114 / 151

113
Installing the Controller, and the X Axis Home Switch
Home Switches are simple contact switches. They can
create a transient voltage spike when opened or closed.
Stepper Motors also generate electrical interference
which can cause the Controller to act as if a Home Switch
has been depressed. Most controller programs have a
“switch debounce” routine that ignores these spikes an d
only validates a signal if it is held for a few milliseconds.
The best way to minimize electrical interference is
careful wire routing. Please follow the wire routing
instructions in the manual.
Step 1 Install the UNO Controller to the Controller Mount on the
Gantry Assembly using four Zip Ties as shown. NOTE: when
threading the Zip Ties through the attachment holes, do not
tighten until all four Zip Ties are installed. Do not over-tighten.
Once installed, clip the loose ends of the Zip Ties.
TIP
T