Bernard:
Can you explain this a bit better, Mill seems to be working properly
according to reports. Is is possible that your pulse width is too low for
the circuit? Steve reports proper operation in Mill, just lathe causing
problems.
I'm using spindle Step/Dir with V7.2, just changed from M1 where
spindle was OK, this is mill. Using 25Khz kernel freq, calibrated
FotV at half speed VFD op = 60hz,increase speed to 3/4 output = 83hz,
increase to max output = 87hz. (FtoV has been checked for linearity
using separate function generator).
I don't understand this statement. Do you mean you get 60Hz at half speed
and 87 at full? with 83 at half?
Looking at the ouput of the D-FF pre-scalar at 1/2 speed frequent,
but random, change in output from 80uSec to 50uSec, at 3/4 speed
pulses change from 55uSec to 30uSec, not possible to measure pulse
train at full o/p - too random.
Too random at full speed? This is strange, at full speed, you should be
getting a 25Khz output to the FF from the printer port. Can you verify this?
I am getting 25Khz at full output from the printer port.
The output of the VFD dithers .2 to .3 in the Hz window at all ouput
frequencies.
Sounds like the conversion is not owrking, what are you using to convert
from step pulses to the VFD?
Thanks,
Art
