Messages

1771

General Mach Discussion / Re: Speed control

« on: December 30, 2007, 01:56:13 PM »

I have never found one, G50 S1000 is the normal format but G50 is scaling on Mach turn.

Graham.

1772

G-Code, CAD, and CAM discussions / Re: crank shaft

« on: December 30, 2007, 01:46:52 PM »

Email me a .iges file of the part and lets have a look at what can be done.

Graham.

1773

General Mach Discussion / Re: Questions: M3Turn Tool Table

« on: December 30, 2007, 10:45:39 AM »

As for screen shots, I think most of us use Wisdom-soft Screen hunter, its FREE.

http://www.wisdom-soft.com/downloads/downloadfiles.htm

Graham.

1774

General Mach Discussion / Re: Questions: M3Turn Tool Table

« on: December 30, 2007, 10:40:41 AM »

Give me some dimensions of the arc and part you want to cut and I will give you some sample code.

Do you work rad or dia?

Graham.

1775

G-Code, CAD, and CAM discussions / Re: crank shaft

« on: December 30, 2007, 09:24:41 AM »

Are you trying to make it on a lathe or a mill?

Graham.

1776

General Mach Discussion / Re: OK that does it!

« on: December 30, 2007, 09:02:27 AM »

Well at least its better than before. 

when cutting threads you should always use exact stop mode if cutting into a groove. if you use cv then the thread can become tapered towards the end of the cut due to cv blending corners.

The slight pitch error is probably the reaction time of your machine and the signal processing time of your system.

To get the best results from threading you must allow time for the machine to react, even on fast industrial machines you have to allow acceleration and deceleration times.

Allow 5mm (.200")  in front of the thread for acceleration and 2.5 (.100") if possible at the back for deceleration. Also keep the speed down, if the exit looks ragged halve your speed.  It is impossible to say what speed to use as every machine is different but start low e.g. 100 rpm and work up.

Using the new macro you could issue a L720 and allow the thread to feed out over 2 pitches thus giving a very smooth and neat exit.

Graham.

1777

G-Code, CAD, and CAM discussions / Re: skull and crossbones G code

« on: December 28, 2007, 06:29:17 AM »

Sorry Guys,

I did not think the post needed a reply, it looked more like a statement than a question. Sorry,

Graham.

1778

General Mach Discussion / Re: OK that does it!

« on: December 26, 2007, 05:55:32 PM »

I have sent the macro to Brian and Art, as I do not have the authority to post modified versions of there original code they will decide if it gets into the distribution.

Sorry, its all I can do at the moment.

Graham.

1779

General Mach Discussion / Re: OK that does it!

« on: December 26, 2007, 05:23:27 PM »

I think the macro was a bit wrong.

I have recoded it to work like the big machines do it.

So the tool now comes out over a rotation angle set by the L word.

L180 will bring the tool out over .5 of a pitch L270 over .75 of the pitch etc.

Graham.

1780

General Mach Discussion / Re: OK that does it!

« on: December 26, 2007, 04:33:38 PM »

I have sent a new G76 macro to Brian and Art for there approval, if my code is right this should hopefully fix the problem.

Graham.