Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: docltf on November 11, 2008, 12:56:30 PM

Title: 4th axis ghost move
Post by: docltf on November 11, 2008, 12:56:30 PM
using mach3 ver 2.02 and ver 3.042.016  -- using no CV and no backlash!
below a code snippet. -- mach3 adds a move between the lines of code before execution.

g00 x-1.9375 y0 a0
g01 z-.100 f5
         (then Aaxis makes a move 0.050)
g01 x-.0625 y.125 a90 f7.0
g02 x-.0625 y-.125 r.125
          ( then A makes a move 90.2167)
g01 x-1.9375 y0 a180
          ( then A makes a move 180.050)
g01 x-.0625 y.125 a270
g02 x-.0625 y-.125 r.125
          ( then A makes a move 270.2167)
g01 x-1.9375 y0 a360

the Axis is suppose to move from 0 to 90 not 0 to 0.050 then to 90 .
it is adding a extra move before it executes a line of code that includes the 4th axis

bill
Title: Re: 4th axis ghost move
Post by: HimyKabibble on November 11, 2008, 01:18:10 PM
Are you using backlash compensation?  That will add moves.

Regards,
Ray L.
Title: Re: 4th axis ghost move
Post by: docltf on November 11, 2008, 04:04:18 PM
using mach3 ver 2.02 and ver 3.042.016  -- using no CV and no backlash!
Title: Re: 4th axis ghost move
Post by: RICH on November 11, 2008, 05:50:02 PM
Does it act the same with both versions? Can't tell you anything about 2.02 ( is this before 2.63 even?)
What code do you have before the first goo?
Also did you write the code or did it come from a wizard?
RICH
Title: Re: 4th axis ghost move
Post by: docltf on November 11, 2008, 06:26:10 PM
Hi ,Rich

i got it under control but it is still not clean ,just a slight move. had to set shuttle speed to the bar bone and open and close mach a few times so it would catch.i never noticed it running
small dia parts . with a 18 inch dia part it is a big problem. well back to the grind,thanks.

bill