Messages

1551

G-Code, CAD, and CAM discussions / Re: Thread milling

« on: September 17, 2008, 06:33:02 PM »

Yes it can be done, use a single point tool and lots of maths.

PM me your email address.

Graham

1552

G-Code, CAD, and CAM discussions / Re: radial curved slots - won't cut to dimension.

« on: September 17, 2008, 06:27:45 PM »

Is this a travelling quill machine, is so keep the quill movement as small as possible.

It may also be a good idea to take a finish pass around the part and see if that makes a difference.

Graham

1553

G-Code, CAD, and CAM discussions / Re: Conventional CNC Threading

« on: September 09, 2008, 07:26:16 AM »

I did not explain that too well.

The Z axis is programmed to stop at a given point e.g. Z-25.0  If the X axis was to jump out at the same point on each pass the lead out would end up as a ring around the job, so they jump out sooner as the depth increases. The amount of lead out is programmed in degrees of rotation in Mach, the reaction time of your set up determines how accurate this is produced.   

Dose that make more sense ?

Graham.

1554

G-Code, CAD, and CAM discussions / Re: Conventional CNC Threading

« on: September 09, 2008, 06:42:42 AM »

If you think about how a thread is cut, you have to stop at the same end point for each pass of the thread.  The only way to do this as the thread depth increases is to jump out of the thread sooner.

Graham.

1555

G-Code, CAD, and CAM discussions / Re: cutter comp question

« on: September 08, 2008, 11:39:28 AM »

Have you tried running your code with the X & Y figures in the G02 line, Mach has been known to misbehave if they are missing.

G03X113.8497Y11.0624R0.75
G02 X? Y? I-0.5447J6.2262
G03X113.6225Y10.7915R0.25

Graham

1556

General Mach Discussion / Re: layers

« on: August 25, 2008, 08:35:04 AM »

Hi Mike,

not sure what you are asking, Mach only runs g-code, the order of which is determined by the g-code creating program or person.  Lazycam on the other hand imports DXF files and produces g-code for Mach to run.

I never use Lazycam, others here are better qualified to advise you on its use.

Graham.

1557

General Mach Discussion / Re: tip radius compensation problem

« on: August 25, 2008, 08:24:08 AM »

Try the code like this, when using compensation you must always move in the same direction, if you reverse your movement the the tool jumps to the other side of the line.

Tool comp in version 1.84 is not perfect at the best of times.

G18
G21 G40
G61
G90
G94
T0101 (utensile a sfacciatore)
g0 x20. z2
G01 G42 Z0  F30.
x26.66
x44.45 z-61.1
z-62.8
g2 x47.45 z-64.3 r1.5
g1 x61
g3 x64 z-65.8 r1.5
g0 G40 x66 z2
M30

Graham.

1558

General Mach Discussion / Re: Very basic question about tool diameter compensation

« on: August 20, 2008, 03:43:55 AM »

Hi Ed,

your comments are true, but it also depends on the control some need 90 degree only approach others can work out vectoring some will apply the the cc during the rapid to position.  If you read through the G-code examples you will find that the samples are code as you were taught.  CC can also be applied on a single arc lead in.

Graham.

1559

General Mach Discussion / Re: Beginners Guide

« on: August 19, 2008, 06:48:07 PM »

Hi Rol,

to what, G-Code, Mach3, Life?

If its Mach3 then this is the place to start, just keep asking questions, there are lots of cleaver people here all sat at home with nothing better to do    so very willing to help 

Graham.

1560

General Mach Discussion / Re: cnc router work

« on: August 19, 2008, 06:41:26 PM »

You asked about this some time back, what has happened, are you still having problems?

Graham.