A axis value buildup

[Greg_J]

I am making a 4 axis tool path and when I have the program post the A axis value is up near the 200k value. My rotary has a limit to the A value so the tool path is no good. I was reading in the iTNC 530 book about a M29 that will take for example a 365 value and make it 5, so if that works I need to put it on every line with a A move, how do I get MC to post that way?

 

The other solution would be the use zigzag, I've tried that and it doesn't change the program. I thought it would have gone from A0 to A360 and then back to A0 and it would do the whole part like that. The tool path just keeps winding the A axis up.

 

Any ideas using MC to fix the proble or any help with the controler settings (Heidenhain i530).

 

Thanks.

Greg

[Bruce Caulley]

I think the max A on a heidi is a parameter. I know I have seen one changed from 50000 to 99999 for a similar problem.

 

Bruce

[Greg_J]

Thanks Bruce, I'll have to look into it more, I don't know why they would even have a limit, I don't believe that the motor can get over wound.

Have you used M94? (I wrote the wrong code in the last post)

 

Does anyone know about how to get the M code in every line when I post?

[Tony35]

greg j

do you have the machine def A axis limits set?

 

check the post for this line

one_rev : 0 #Limit rotary indexing between 0 and 360? (0 = No, 1 = Yes)

 

just some ideas thinking out loud

 

HTH

[PeterM]

Could you break the program into subs and use incremental(g91)to get the extra rotations that you need?

[silky_johnson]

m126

[Columbo™]

quote:

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I don't believe that the motor can get over wound.

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Watch out or you'll break the rubber band.....

 

seriously......check out the machine def......

[Greg_J]

quote:

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do you have the machine def A axis limits set?

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No, I have never changed that setting, it was a +/- 360000. I changed that value to +/-3000 where I think the limits are, but it's still post with high numbers.

 

quote:

---

one_rev : 0 #Limit rotary indexing between 0 and 360? (0 = No, 1 = Yes)

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It's set to 1., is that what it should be?

 

quote:

---

Could you break the program into subs and use incremental(g91)to get the extra rotations that you need?

---

Yes I could but I but I want to see if there is a fix for this problem, If not I will probably just do it in segments instead of one big program.

 

I would have responded earlier but the internet is down at work and I have to wait till I get home to post.

[Justin Beebe at Folsom Tool]

Greg,

 

We have that control on our Deckel. I don't program it that much but I will ask the guy who does and see how ours is set up. Just to make sure I know what your talking about: You have a four axis toolpath that causes the A axis to rotate so many times in the same direction that the machine alarms out? I will look into it tommorrow.

[Greg_J]

Yes exactly it alarms the A axis limit.

 

Ours is a Deckel Maho 104v linear with a 4th axis.

[Greg_J]

I would still like to know how to attach a M code to every line, does anyone use Cimco Edit 5 I'm sure there's a way in that program I just haven't figured it out.

[htm01]

if you wanted M126 in every line

go to setup/block numbers

change "N" to "M"

set interval = 1

set start with: = 126

set Restart every: = 1

 

then just renumber

[Justin Beebe at Folsom Tool]

Greg,

 

I looked into your issue today but could not come up with anything. Maybe you could contact Hiedenhain or Deckel Maho.

 

Sorry I wasn't more help

[Greg_J]

No problem thanks for looking into to it for me.

 

It's not really that big of an issue I can break the program into parts. One of the problems that I forsee is that I will make a program that will rotate to my limit but when I run the next I will have to un rotate back to what ever starting point MC chooses.

 

It will waste time waiting for it to unwind if there was a way to make my next program start where I finished and rotate back to 0 or in the neg direction.

[Ralph@Faustson]

Our posts are set-up to go only from 0-359.999 and the mackine parameters are set the same way. Works great that way and thus never any un-wind issues etc.

[Greg_J]

Did you set up your post? If so what did you change?

[HEAVY METAL]

my control has a parameter for rotary wind up . I think it is a combination of the the MC post and control parameter set the same