Hello Guest it is March 29, 2024, 04:44:54 AM

Author Topic: z axis control issue  (Read 1077 times)

0 Members and 1 Guest are viewing this topic.

z axis control issue
« on: August 02, 2020, 11:00:29 PM »
I am using fusion 360 with Mach 4 and Polkeys.

I have been cutting a few parts and everything seemed fine but now on a new part the Z axis wont go down to the material. It stops short by a couple of inches. I have my wcs at the bottom of my part  / top of spoil board. I zero the Z axes at the top of the spoil board, home the machine. I start the g code and as its starting its movement the Z coordinates get modified in the process as i am watching the position and it takes off a couple of inches off the z. I have tried homing first and then setting z to 0 and still get the same result.

I have copied the start of the g code below, Let me know if anyone has any ideas.

(  VENDOR AUTODESK)
(  DESCRIPTION GENERIC 3-AXIS)
(T1  D=0.25 CR=0. - ZMIN=0. - FLAT END MILL)
G90 G94 G91.1 G40 G49 G17
G20
G28 G91 Z0.
G90

(2D CONTOUR1)
M5
T1 M6
S5000 M3
G54
G0 X12.8754 Y35.394
G43 Z1.35 H1
Z0.95
G1 Z0.9144 F1.
Z0.65
X12.8757 Z0.6461 F40.
X12.8766 Y35.3941 Z0.6423