Single Line Helix

[Mic6]

Hey Guys, Ive done some searching for this, but haven't quite found what I'm looking for. When I do a Helical bore/Entry, I get many lines of code. One line for each 360deg. If I feed over 60ipm, I get a slight dwell at the start point everytime the tool comes around. Is it possible to make a helix one line?

[Guest]

If your making multiple revolutions< i'm not sure you can

 

Have you tried turning off infinite look ahead on the tool path parameters page, under the cutter compensation?

 

See if that gets it for you.

[Colin Gilchrist]

You can do this, but it takes some serious post development. We had a guy do this to one of our posts an it took him quite a while (but he did it which was really impressive). You have to buffer out the Helix information from the NCI and count the number of revolutions and the depth.

 

Your control must also be capable of cutting this type of helix...

[Mic6]

Look slike it may cost me Ifinite look-ahead didn't work john.

[Thad]

This only happens above 60 IPM? Is there a code to turn off accel/decel? It was G8 on our Fadals.

 

Thad

[Colin Gilchrist]

How much memory do you have in the controller? The reason I ask is that you might be able to linerize the helix into a bunch of tiny line segments. Not the best way to go I think, but it won't cost anything to try

 

Is the dwell only at the start/end of each helix?

 

What about hand coding the helix and using a Manual Entry toolpath? I've done this for projects I needed to test or get done in a hurry...

 

I just think it is worth a test out at the machine before you blow a bunch of money on post mods...

 

HTH,

[Tony35]

quote:

---

I get a slight dwell at the start point everytime the tool comes around

---

is it an older machine? i had a macro do this on me once if i remember right it was a fanuc 15m it would always dwell at the start/end of the helix. so i did a helix in MC and it still would dwell. so i got a feeling it is accell/decell like thad is thinking or maybe look ahead on the machine. i never did get it fixed or figured out.

[gcode]

Don't have any idea if it would help but its very easy to do.. Try breaking arcs into quadrants

in the control definiton

another easy test

change the start angle in helixmill to something

other than 0 90 180 or 270..

[Mic6]

It's a brand new VF-2. I'm going to try all of those suggestions on Monday. I'm at home and was itchin' to see responses. Thanks guys, I'll update on what happens.

[scott41]

We have 2 Haas machines here and if we are roughing a hole with helix bore this is what we do.

Hit the SETNG/GRAPH button on the control panel.

Page down to "Program 2" (hit page down twice)

Change Param. 191 - Default Smoothness to Rough

(Right arrow twice)

This will take out the hesitation.

It wont do anything for the length of code though.

 

HTH

 

Scott

[PeterM]

Are you using axis substitution? I have a series of parts where I cut a channel for a wire. Here is a sample of the code that I get. I do filter the output. This post is based on the generic haas post but I didn't do anything terribly clever to the post.

 

N1(1.5 MM BALL ENDMILL)

T1

M6

G0G90X-.1575Y0.A0.

S6000M3

G43H1Z.4528M8

G1X-.9994A-956.171F4.

X-1.0074Z.4527A-962.694

X-1.0181A-969.16

X-1.0314A-975.547

X-1.0474A-981.838

X-1.0659A-988.016

X-1.0869A-994.064

X-1.2853Z.4528A-1045.123

X-1.3015Z.4527A-1050.252

X-1.3154A-1055.491

X-1.327A-1060.82

X-1.3363A-1066.222

X-1.3431A-1071.681

X-2.187Z.4528A-2029.443

X-2.1924Z.4527A-2031.164

X-2.201A-2032.665

X-2.2123A-2033.852

X-2.2255A-2034.651

X-2.2398A-2035.014

X-2.2545A-2034.917

X-2.2685A-2034.366

X-2.281A-2033.397

X-2.2912A-2032.068

X-2.2985A-2030.461

X-2.3024A-2028.676

X-2.3028A-2026.823

X-1.4604Z.4528A-1069.96

X-1.4532Z.4527A-1064.072

X-1.4435A-1058.24

X-1.4315A-1052.479

X-1.4171A-1046.805

X-1.4004A-1041.234

X-1.3815A-1035.779

X-1.1818Z.4528A-984.357

X-1.1636Z.4527A-978.584

X-1.1479A-972.689

X-1.1349A-966.692

X-1.1244A-960.612

X-1.1167A-954.469

X-.2763Z.4528A0.

G0G28G91Z0.

G28Y0.A0.

M30

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