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General Mach Discussion / Re: Mach3 Turn G95 feed rate changes by itself intermittently
« on: September 27, 2016, 09:40:08 AM »
Thanks for the recommendation Hood.
I tried 'Spin up Delay' at 1 sec (also tried 2-5), but noticed no difference in my test program. It always runs the same way.
in the little test program the first few passes will run at F0.0065 but on the last pass it runs at the specified F0.008. I specify S800 and get a True RPM of '776' (both on DRO and measured with laser tach) which is pretty close.
This example isn't terrible as the feed isn't off by too much, but I don't get why it is off at all. Thanks again for trying to help.
I tried 'Spin up Delay' at 1 sec (also tried 2-5), but noticed no difference in my test program. It always runs the same way.
in the little test program the first few passes will run at F0.0065 but on the last pass it runs at the specified F0.008. I specify S800 and get a True RPM of '776' (both on DRO and measured with laser tach) which is pretty close.
This example isn't terrible as the feed isn't off by too much, but I don't get why it is off at all. Thanks again for trying to help.
Code: [Select]
G20 G90 G18
T0101
( rough )
G95
G97 S800 M3
M08
G0 X0.55
G0 Z-0.2377
G0 X0.5625
G1 F0.001 X0.47
G1 F0.008 Z-1
G0 X0.55
G0 Z-0.2559
G0 X0.5325
G1 F0.001 X0.44
G1 F0.008 Z-1
G0 X0.55
G0 Z-0.2827
G0 X0.5025
G1 F0.001 X0.41
G1 F0.008 Z-0.4011
G0 X0.55
G0 Z0.0
G0 X0.51
G1 F0.008 Z-0.219
G3 X0.5024 Z-0.2239 I-0.005 K0.0
G1 X0.5003 Z-0.2241
G2 X0.4334 Z-0.423 I0.0922 K-0.1178
G3 X0.435 Z-0.4257 I-0.0042 K-0.0027
G1 Z-1
M5
M30
%