Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: biffo on October 29, 2008, 09:08:26 AM

Title: 4th Axis
Post by: biffo on October 29, 2008, 09:08:26 AM
Hi All
I  joined the forum after completing the cnc conversion on my X3 when I converted it I made provision for a fourth axis which I have now installed Mach 3 sees it ok but when I used the gear cutting NFS wizard x and y do what they are supposed to do but A axis does not respond. Any Ideas?
Biffo
Title: Re: 4th Axis
Post by: Chaoticone on October 29, 2008, 09:32:12 AM
Welcome, your free to post in other boards now.

Brett
Title: Re: 4th Axis
Post by: Graham Waterworth on October 29, 2008, 12:38:46 PM
Hi Biffo,

can you jog the A axis using the keyboard?

Graham
Title: Re: 4th Axis
Post by: biffo on October 29, 2008, 03:00:09 PM
Hi
 To be honest I have not tried using the keyboard to jog the A axis but have only ued the 4th axishe jogging flyout to jog it which works fine.
Cheers
Biffo
Title: Re: 4th Axis
Post by: Graham Waterworth on October 29, 2008, 03:11:22 PM
OK,

What happens if you type  this code into MDI

G00 G90 A90.

put a sample of your code here for me to look at.

Graham
Title: Re: 4th Axis
Post by: biffo on October 30, 2008, 09:24:25 AM
Hi
On running you code the A axis moves for about half a complete turn of the table. Here is the code I am trying to run
G00 G64 A0.0
Y-30.1 X0
(This program has No Z moves!)
M98 (Index.tap) Q20
M5 M9
M30

Cheers
Biffo
Title: Re: 4th Axis
Post by: Graham Waterworth on October 30, 2008, 03:11:02 PM
OK, I would have expected it to just move 1/4 turn.

The code you have shown may need a tweak

G00 G90 A0.0
Y-30.1 X0
(This program has No Z moves!)
M98 (Index.tap) L20
M5 M9
M30

Try it like this and let me know how it has changed

Graham
Title: Re: 4th Axis
Post by: biffo on October 31, 2008, 05:46:40 AM
Hi
We seem to be getting there your code worked fine with the rotary table moving the correct amount so
I tried running the NFS wizard to cut a 30mm dia wheel blank with 20 teeth it spends 4 minutes cutting the first tooth the at the end rotates 18 deg and starts again on the next tooth I would have expected it to cut one tooth then rotate to the next one but I could be wrong.
cheers
Biffo
Title: Re: 4th Axis
Post by: Graham Waterworth on October 31, 2008, 07:54:42 AM
Good, thing are working.

I would post your NFS problems in the NFS area an may be Ron Ginger will answer you, Ron maintains the wizards so he should know the ins and outs.

Graham