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Show"N"Tell ( Your Machines) / Re: EMCO VMC-100 upgrade ready
« on: March 13, 2014, 07:42:14 PM »
Here are some schematics.
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I have not read the manual but the way I have always treated things in motor tuning is.
Steps/Unit
Units/minute
Units/s/s
So what I would say is set is
steps per unit to 20 as you are wanting one unit to be 1 revolution
set velocity to 3000 as you are wanting 3000 rpm
set accel to whatever you want but probably around about 20 for a start, that would be 20 revs/sec/sec so 3000rpm in 2.5 sec.
Set your spindle pulleys Max to 3000.
Hood
I have a servo spindle (using step+dir for Granite devices VSD-E) which I have configured both as spindle and as A-axis, so they have both the same LPT port pins in Mach config. .It has been a while since I have used a parallel port, but it seems you are saying that both the Spindle and the A axis are sharing the same physical pins. If that's correct, I can't imagine the thing is working at all unless by sheer coincidence.
It works.
Quote(so A axis tuning is working ok and spindle tuning steps per unit acts funny). When running at higher steps/s, the servo amp will smooth the rotation. With that slow movement, it really jumps, stays, jumps, stays..It acts not funny, it acts how you set it up. 1RPM = 20 pulses per minute thats 1 puls every 3 seconds. The A axis acts the same, try
G0A0
G1A1F1
This behav is due to your poor resolution. You should increase it.
Alex
Ok I reckon it may be your max speed in Spindle Pulleys setup that is the issue. Set that to the same as your Spindles Motor Tuning and see.
Hood
Can you double check the spindle by commanding S1 and seeing if it takes 1 minute to revolve.
Hood