On 05/22/2021 07:12 PM, dave engvall wrote:
Has anyone tried homing off the reference channel on a
glass scale? There is information on the web indicating
that at least some of the chinese glass
scales mask and compare the 4 lines each side of the
reference mark in addition to the reference. This might
imply that the usual homing routine would work.
I haven't tried this only because I have nothing running
at the moment capable of doing this.
If the "reference channel" produces one pulse at a specific
spot on the scale with no other pulses within a few tenths
of an inch, you should be able to use it for precise
homing. You'd have a limit switch that would begin the
search for index sequence of the homing routine. Then, it
would advance until it saw the pulse from the scale. Just
like the Z mark on a rotary encoder.
Jon
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