Messages

1511

Tangent Corner / Re: A Puzzle.

« on: November 06, 2008, 12:43:25 PM »

?

Graham

1512

General Mach Discussion / Re: Line Numbers in G Code

« on: November 05, 2008, 04:54:06 PM »

No it dose not care about them, they are ignored.

If you put them in there are more rules, e.g. you can not have a line number on the program number line 'N0001 O0001'

Graham

1513

General Mach Discussion / Re: Line Numbers in G Code

« on: November 05, 2008, 12:06:54 PM »

You can use them if you wish, Mach has no need for them.

Graham

1514

General Mach Discussion / Re: Peck Drilling

« on: November 04, 2008, 05:19:02 PM »

In soft materials it is sometimes better to peck in .020" pecks with a high feed rate of say 3 to 4 times normal and 1.5 times spindle speed with a retract of .010" and flood coolant.

This way low power spindles get a chance to recover before the next cut and also the chips are small and clog free.

Using this method you can drill holes much bigger than normal and much faster than normal. Give it a try but don't tell anybody, its a trade secret.

Graham

1515

General Mach Discussion / Re: need help with g code and cutter comp issue

« on: November 03, 2008, 02:04:03 PM »

Your code is all screwed up, post a picture/drawing of what you are trying to make along with sizes and I will recode it so you can see how it should be done.

Graham

1516

General Mach Discussion / Re: Backlash Compensation question...

« on: November 02, 2008, 08:51:16 AM »

No problem 

Graham

1517

General Mach Discussion / Re: Backlash Compensation question...

« on: November 02, 2008, 08:40:35 AM »

Jim,

I can only see your theory working if the encode is mounted to the slide and not the motor, if the encoder is on the motor then there is no backlash between the encoder and the motor unless the encoder is slipping on the motor shaft.

Dave,

if you have more than .001" backlash then you need to fix the machine mechanics, if its so bad then cutter pull will spoil any job you try to do. You will get tools snatching the work and this is never good.

Just my view.

Graham
 

1518

General Mach Discussion / Re: 4th Axis

« 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

1519

General Mach Discussion / Re: crazy circles from an ARC PP on one machine, OK on another!

« on: October 30, 2008, 04:19:59 PM »

Try changing the IJ mode under general config.

Graham

1520

General Mach Discussion / Re: 4th Axis

« 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