No Feedrate using G93

[Rstewart]

X6 MU2

 

MpMaster Post

 

I've read some other posts on this topic, but not much help...

5 Axis Multi-Surf Locked to 4 Axis output

 

I had some free time so I opened up one of the sample Files supplied with MC- 4 Axis (TORRUS) then replaced with My Post.

 

posted out what looks good except after about 50 or so blocks in G93 It Quit Outputting a F command. Fast Forward bout 20 blocks and the F commands are back?? I found out that Feed commands are Not modal on Fanuc when in Inverse time mode. So the machine just stops with a No F Command with G93.

 

I've checked the Def settings 9999. and .0001

 

Any Ideas on this?

[shazam/TPP]

does it switch back to G94 and then back to G93? if so you will not have a F on every line.

[Rstewart]

Nope, That happens while in G93.

[Jeremy Herron@DBS Solutions™]

Could you go to plinout in you .pst and say something like if use_frinv = 1, *feed on the pbld line. Hard to say the exact format without seeing your post.

[shazam/TPP]

so your not using the standard mpmaster post? or you've modified it? try downloading the original and see if you get the same results. i use the mpmaster and have not encountered this.

[Guest CNC Apps Guy 1]

On linear moves you will not see subsequent feedrates. So, after you call up your tool offset in a Z move, that is linear, activating a feedrate, then when you go to rotary moves, you jump into G93, then you go to linear move it will switch back to G94 then you wil not see a feedrate as it is still active, etc...

[Rstewart]

Could you go to plinout in you .pst and say something like if use_frinv = 1, *feed on the pbld line. Hard to say the exact format without seeing your post.

 

Not at work now, but in the morning I might try the stock MpMaster and check out the results. I like your idea on that post mod.

 

James, this happens during an Inverse time cut (G93). Machine then alarms out.

[Rstewart]

Well the default 4 Axis mill post outputs Inverse time correctly with a feed move on every block.

 

So guess the problem is something in my post...

 

I'm only decent at post mods but I'd be happy to send my post for someone to glance at

[shazam/TPP]

did you mod your post from the standard 4 axis mill post? if so and you have Cimco Edit (comes with x6) you can open both files and do a file compare and change yours to match the original in those certain areas. make BACKUPS FIRST. hth