About system drift
Drift in the machinery causes imprecise cuts. Note that drift isn't the same
as incorrect
scale factors or Gcode that is of the wrong dimensions.
Drift is the behavior where, over time, the machine will either
accumulate error or oscillate between having error and being on target.
There are a two main causes of drift, Electrical and Physical.
Physical drift is caused by loose parts. Potentially loose parts are Pulleys
(motor or ball screw side) that can spin freely or where the set screw
oscillates on the flat of the shaft, loose couplings, belts that aren't tight
enough, loose mechanics, etc. When you have a loose physical part, you may
receive the Axis
drifted error message. If you get an axis drifted error but a Pulse
test shows no error, the problem is not electrical, and can only be
physical. Note that a loose encoder counts as a physical problem, not
electrical.
Pages pertaining to troubleshooting physical drift:
Axis
drifted
Drift
test
Mark
Pulleys
Electrical drift is caused ONLY by problems with the electronics of the
machine. If you have drift, and you get the Pulses
were gained or lost message, the issue is not mechanical (unless there are
two things wrong, electrical and mechanical, which is rare but possible). If you
perform the Pulse
test and the system gives an error, your problem can only be either the
electrical wiring or a damaged/dusty encoder. No amount of loose parts,
couplings, shafts, etc, can cause a pulse drift error.
Pages pertaining to troubleshooting electrical drift:
Pulse
test
Pulses
were gained or lost
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