Messages

3781

General Mach Discussion / Re: Newbie of course! testing

« on: December 06, 2015, 02:14:28 AM »

Hi Max,

Welcome to the forum.

Could it be that the Gcode you are running is in 'Inch' units and your machine / Mach3 has been set-up in 'mm' units ??

(ideally all Gcode should contain a G20 or G21 (as appropriate) to avoid this issue but we don't live in the ideal world).

Tweakie.

3782

General Mach Discussion / Re: laser cutting NOVICE/ROOKIE question

« on: December 05, 2015, 10:57:48 AM »

I see no reason why you should not use Sheetcam and cut things in two or more passes, raising the bed between cuts, as you suggest.
Ideally, materials are vaporized when cutting rather than burned but all materials behave differently. Whilst true Acrylic will vaporize and leave no residue wood, on the other hand, will leave a carbon residue which has to be removed by the air assist before subsequent passes.
As there is no tool load on the cutting head drive torque requirements are modest so NEMA 17's will be just fine.
For cutting there is no problems with laser switching M3 / M5 will do but for engraving you will find the the speed of the M11 / M10 is desirable.

Tweakie.

3783

Forum suggestions and report forum problems. / Re: you posted here

« on: December 05, 2015, 08:09:50 AM »

Hi Bob,

If you created the thread then it may say 'Normal Post'
If you reply to a thread you did not create then it will say 'You Posted Here'
If the reply's to a thread (if you created it or not) exceed a pre-determined number then it will say 'Hot Thread'

There are other variants as well, they are basically all designed to help you navigate the forum and make it a more enjoyable experience.  

Tweakie.

3784

Third party software and hardware support forums. / Re: Which BOB would you recommend

« on: December 05, 2015, 02:22:40 AM »

This thread may be of interest to you https://www.machsupport.com/forum/index.php?topic=18214.0

Tweakie.

3785

Mach4 General Discussion / Re: Use probing for tool zeroing

« on: December 05, 2015, 01:42:57 AM »

 

Tweakie.

3786

Tangent Corner / Why is a Poet's Day so quiet ??

« on: December 04, 2015, 08:09:42 AM »

Hi Guys,

Currently, I have a large quantity job which takes just over the hour to complete each item so between set-up’s I have had quite lot of time to devote to the forum recently.
There is generally a lot of forum activity Saturday to Thursday but Friday’s are always quiet – anybody have any ideas as to why a Friday should be so slow ??

Tweakie.

3787

Modbus / Re: Arduino Modbus, Complete, Documented and free

« on: December 04, 2015, 07:55:39 AM »

Hi Frank,

Welcome to the forum.

Excellent explanation.

Tweakie.

3788

General Mach Discussion / Re: Z-axis Locked

« on: December 04, 2015, 01:29:28 AM »

I am pleased you have it working. 

Tweakie.

3789

General Mach Discussion / Re: Carving in reverse

« on: December 04, 2015, 01:27:22 AM »

I am pleased you have it working. 

The Velocity and Acceleration figures are arrived at by 'trial & error'.
Just one axis at a time, increase Velocity until the axis starts to stall (shift + arrow key - fast jogging) then reduce the figure by 30%. Repeat for each axis and do a similar thing with Acceleration.

Tweakie.

3790

General Mach Discussion / Re: Carving in reverse

« on: December 03, 2015, 05:47:07 AM »

The usual convention for X0 ,Y0 is at the left hand corner nearest to you.

Assuming your horizontal axis is the X axis then if you go to Config. / Ports & Pins / Motor Outputs then change the Direction Low Active state for the X axis that will correct your letters being in reverse.

As for the letters being on top of one another - that could be lost steps, try reducing your Velocity and Acceleration settings by 50% (in Motor Tuning) for the X and Y axis, save the changes and report back on the result.

Tweakie.