Lathe 4 axis XZW for tailstock

[Aurelien]

Hi

I try to setup my tailstock but i have one issue.

Trying config as A axis work correctly (motor move)

[DISPLAY]

GEOMETRY = XZA

[TRAJ]

COORDINATES = X Z A

AXES = 4

JOINTS = 4

 but trying to config as W does not work (nothing move + joint 8 following error)

[DISPLAY]

GEOMETRY = XZW

[TRAJ]

COORDINATES = X Z W

AXES = 9

JOINTS = 9

I have do some test with B than also does not work

Is there something special to do ?

Br

[Aurelien]

Hi again, sorry problem solved :

# W axis

[AXIS_3]

to 

# W axis

[AXIS_8]

Br

[Aurelien]

Hi all

Regarding to this motorised tailstock i have do some test and i have see something strange.

Because i have a W axis (motorised tailstock) and i haven't any Drill position on this ATC i like to use W axis with synchronised motion.

-G33 W-15.5 K1 work like a charm but need to be in G18 ????

-G33.1 W-15.5 K1 does nothing (i can see in Axis GUI after other command the status is like "run program" but this one change nothing)

-G73 W-15.5 R-10 Q1 need to be in G17.1 plane on a lathe with XZW ???? 

-G76 "cannot move rotary axes with G76"

-G81 G82 G83  need to be in G17.1 plane on a lathe with XZW ???? 

I hope someone know more about this.

Br

[Aurelien]

Hi again

Little update for the last message

Hi all

-G33 W-15.5 K1 work like a charm in G18 so is ok

-G33.1 W-15.5 K1 does nothing (i can see in Axis GUI after other command the status is like "run program" but this one change nothing)

-G73 W-15.5 R-10 Q1 need to be in G17.1 plane on a lathe with XZW ???? 

-G81 G82 G83  need to be in G17.1 plane on a lathe with XZW ???? 

-G76 "cannot move rotary axes with G76" off course this is not needed for a lathe with W, but W is linear ^^

I have check source code for G33.1 and i have see some difference vs G33 regarding to parsing value

Try creating a patch : now i can see in Axis GUI the status is like "run program" but motor don't move.

Br

[Aurelien]

Hi again.

I'm really unsure about the better way to do that the job because i have check source code and i think the needed patch is out of logic regarding to the files that need to be edited/patched 

I have read something about using double Z axis like some unknow for me "gantry" machine.

maybee this is a better way ???
forum.linuxcnc.org/38-general-linuxcnc-q.../35911-double-z-axis

Please i really like to know some opinion.

Br