Do you have a gear ratio between motor and spindle? Do you have high and
low gear?? If you do the motor option is a No-No. The encoder counts are
entered as a constant in the software so could be changed however I
would take a good look at the software before you go that route.
Richard
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On 22/08/2019 15:45, Ralph Hulslander wrote:
Thanks Charlie, that is what I was guessing. I am "thinking" of using
a optical disk I could pretty easily do 100 holes
doing more would get tedious, and I am "thinking" of putting the
encoder on the motor shaft, is there a? way to input
pulse per rev in the controller? I have some CUI Inc. AMT102-V
<>encoders.
Ralph
On Wed, Aug 21, 2019 at 8:27 PM CLevinski <clevinski@...
<mailto:clevinski@...>> wrote:
On Wed, Aug 21, 2019 at 04:41 PM, Ralph Hulslander wrote:
Charlie, and others. Why the spindle encoder? Is a multicount
required to get the spindle speed?
I have seen lots of RPM devices that used one pulse others got
their accuracy with 8 pulses.
So is 600 or 1200 or even 2400 pulses really required?
Is there documentation on the software you are using?
Hi, Ralph,
The spindle encoder is crucial so the ELS controller knows how
fast to drive the lead screw at any given instant.? I usually
thread now using a hand crank; the change gears ensure that the
lead screw turns at the right speed to match my spindle speed.?
But without the gears, how is the lead screw speed to be
determined?? In ELS, it is calculated by the controller as a
specific ratio of lead screw RPM to spindle RPM.? The encoder is
how we determine spindle RPM so we can set lesd screw RPM.
In general, (and I believe in this case), the fewer pulses per
revolution, the more that you are seeing an average RPM, rather
than an accurate one.? This is fine if all you are doing is
reading the RPM on a display.? But with ELS and a very low count
encoder, the spindle might be able to make a significant change in
speed before the processor "knows" about it (because it cannot
update more often than once per pulse), and can adjust the lead
screw and or cross-slide motors to match.? This would result in
uneven threads and poorer finishes.
At least, this is my understanding with the current implementation.
--
Regards,
Charlie
New Jersey, USA
--
Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill
press, 40 watt laser, Consew brushless DC motors and a non working 3D
printer
