Prototrac Cutter Comp

[mcpgmr]

Any one know how to use CDC on a Prototrac. I'm making some simple programs for our night shift guy in our tool room and he always tells me what e.m. diameter to program because he doesn't know how to use CDC. Here is some sample code using a Ø.470 dia. e.m. My guess is that he has to change the .470 value in the program. Thanks in advance!

 

 

PNSLIDPLATE_OP1 G20

(RF ID +.02)

N10

 

N20 ( SET NEW Z! )

 

N30 ( SET NEW Z! )

 

N40 ( SET NEW Z! )

N50 G101 XB+2.1025A YB-0.2350A XE+2.5725A YE-0.2350A TC2 F0. D0.4700 CR0.0 T1

N60 G103 XB+2.5725A YB-0.2350A XE+2.8075A YE+0.0000A XC+2.5725A YC+0.0000A F0. TC2 D0.4700 CR0.0 T1

N70 G103 XB+2.8075A YB+0.0000A XE+2.8075A YE+0.0000A XC+0.0000A YC+0.0000A F0. TC2 D0.4700 CR0.0 T1

N80 G103 XB+2.8075A YB+0.0000A XE+2.8075A YE+0.0100A XC+0.0000A YC+0.0000A F0. TC2 D0.4700 CR0.0 T1

N90 G103 XB+2.8075A YB+0.0100A XE+2.5725A YE+0.2442A XC+2.5725A YC+0.0092A F0. TC2 D0.4700 CR0.0 T1

N100 G103 XB+2.5725A YB+0.2442A XE+2.5716A YE+0.2442A XC+2.5725A YC+0.0092A F0. TC2 D0.4700 CR0.0 T1

N110 G101 XB+2.5716A YB+0.2442A XE+2.1016A YE+0.2425A TC2 F0. D0.4700 CR-0.0 T1

 

N120 ( SET NEW Z! )

N130 ( SET NEW Z! )

 

N140 ( SET NEW Z! )

%

[Colin Gilchrist]

Yep,

 

Just change the D value. That is what I remember when I was first learning how to do CNC on our Bridgeport EZ-Trak back in 1997. My how time flys.

[mcpgmr]

Thanks Colin! I'll pass it on. I've made programs for these types of controls at previous jobs but never actually ran the machine so the machinist would take care of the CDC on his own. I just wonder if the control actually requires the "D" value on every stinking block? I may play with the post and turn it off after the fist call and see what happens. Thanks again!

[Newbeeee™]

We didn't have much luck running comp on a prototrak (2 axis SMX mill).

From memory, the machine applies a radius on and off the job automatically itself.

So, for instance, if you apply lead in/out and contour onto the job, the machine also applies a rad of its own, the size is a ratio of the cutter diameter. Bigger tool = bigger rad.

For tight places, it was a problem.

We only use size tools. It worked safer and easier, because what verify shows, the machine does.

 

For the 3 axis version, I heard thread milling is a little bit awkward for the same reason. I was told that you 'have to fiddle with the z position to make it work right'?

[left coast lefty]

I have a Prototrak DPM V5 (3 axis) and the thread milling feature is totally foolproof. If you try to do it on an MX3, you would have to use the Helix function and it will be a pain in the butt.

[Bruce Caulley]

If memory serves there is no need for a lead in move to apply comp. I did my apprenticeship on one of these starting back in '94. Gee time flies.

 

Bruce

[Bruce Caulley]

code:

---

 PN0201 G21;

N1 G108 XC-70.50A YC-16.25A R8.25 DR1 FC0.10 F500 T02 D6.35;

N2 G101 XB+0.00A YB+0.00A XE-57.00A YE+0.00A TC2 F500 D7.50 CR28.00 T01;

N3 G101 XB+0.0000I YB+0.0000I XE-53.00A YE-49.00A TC2 F500 D7.50 CR2.50 T01;

N4 G101 XB+0.0000I YB+0.0000I XE-56.50A YE-51.50A TC2 F500 D7.50 CR2.50 T01;

N5 G101 XB+0.0000I YB+0.0000I XE-100.00A YE-15.60A TC2 F500 D7.50 CR25.00 T01;

N6 G102 XB+0.0000I YB+0.0000I XE+44.00A YE+10.90A XC-13.62A YC-80.43A F500 TC2 D7.50 CR5.00 T01;

N7 G101 XB+0.0000I YB+0.0000I XE+20.00A YE-5.75A TC2 F500 D7.50 CR5.00 T01;

N8 G101 XB+0.0000I YB+0.0000I XE+6.00A YE-5.75A TC2 F500 D7.50 CR000.00 T01;

N9 G101 XB+0.0000I YB+0.0000I XE+6.00A YE+0.00A TC2 F500 D7.50 CR000.00 T01;

N10 G101 XB+0.0000I YB+0.0000I XE-5.00A YE+0.00A TC2 F500 D7.50 CR- T01;

N11 G105 FE002 LE010 XO+0.00I YO+0.00I RE01 T02 D6.35;

N12 G115 FE001 LE011 XC+10.00A YC-10.00A A180.000 RE01;

---

I dug up an old programme, can't believe I keep as much crap as I do.

 

Anyway, this was programmed at the control, so if you can match this output it should be OK.

 

Bruce