Hi all,

I’m trying to get my first 4th axis cut running. I’m pretty certain I have the steps and velocity set correctly. Steps/per = 400 with a 1.8 deg stepper and 10 uStep and a 72:1 rotary table. 200*10*(360/72)=400.
I have my A-axis velocity set to 3000 and the accel to 1000.
The X,Y and Z velocities are set to 50ipm and accel 15 ipm.


Rapids are fine but when I get to the G1 codes the rotational (angular federate) is limited by the linear feed rate.
Am I missing a G-code for the A axis or is there a setting that I’m missing?

The problem code is commented (C style) below.
T1M6
M3
// next line runs fine
G0 X0.0 Y0.0 Z0.02 A0.0
// next line runs fine, fast to 90 degrees
X0.0 Y0.0 Z0.0825 A90.0
// this line the angular feed rate is limited to the linear feed rate (rotaion is soooo slow)
G1 F22.5 X0.0 Y0.0 Z0.0625 A90.0
// ditto (rotation is soooo slow)
G1 F22.5 X0.0015 Y0.0 Z-0.2054 A99.0001
X0.003 Y0.0 Z-0.1959 A108.0


See you at NAMES
Thanks in advance,

Bob Stack