Messages

6331

General Mach Discussion / Re: Lathe as mill

« on: September 13, 2011, 08:42:13 AM »

H Graham,

I am sure anything is possible and this would make a very interesting project.

Tweakie.

6332

General Mach Discussion / Re: Lazy cam

« on: September 13, 2011, 07:12:45 AM »

Hi Graham,

I Just don't understand that, sorry buddy it is obviously something to do with your computer but I am lost for any further suggestions.

Tweakie.

6333

Post Processors / Re: Post for Signlab V5.

« on: September 13, 2011, 06:32:00 AM »

Sorry,
Martin's excellent site has grown and perhaps become a bit convolute - this would perhaps have been a better link  http://engraving.majosoft.com/index.html?menunr=3&sub=4&lnk=

Tweakie.

6334

General Mach Discussion / Re: Lazy cam

« on: September 13, 2011, 05:00:22 AM »

Hi Graham,

Welcome to the forum.

The sequence; open Mach, click File, click LazyCam should work OK - it opens OK for me using Mach R3.042.022.

Tweakie.

6335

General Mach Discussion / Re: Help with circles

« on: September 13, 2011, 04:50:20 AM »

Hi Isaac,

I am just pleased you have found a problem and at least have a way forward.

Tweakie.

6336

Post Processors / Re: Post for Signlab V5.

« on: September 13, 2011, 03:27:56 AM »

Hi Russ,

What are you requiring Mach to do from SignLab ??

If it is just cutting vinyl then the Roland or Graphtec HPGL can be converted using LazyCam.
I usually convert HPGL using 'Target2GCode' which can be downloaded free from the Majosoft website  http://majosoft.com/

Tweakie.

6337

General Mach Discussion / Re: Help with circles

« on: September 13, 2011, 03:01:51 AM »

Hi Isaac,

As I am sure you already know - If the tool loading or feed rate causes any compression of your 'anti backlash nut spring' then 'backlash' will be present and could most likely cause the problem you are describing.

Something to perhaps try is to decrease the tool loading by reducing the feed rate and / or depth of cut and then use 'multi pass'.

Tweakie.

6338

General Mach Discussion / Re: Help with circles

« on: September 12, 2011, 12:28:17 PM »

Sorry Isaac my bad 

D.T.I is "Dial Test Indicator".

Tweakie.

6339

General Mach Discussion / Re: Help with circles

« on: September 12, 2011, 08:11:02 AM »

Isaac,

You probably need to check all the Kerk data sheets etc. for setting and adjustment of their screws / nuts.  http://www.haydonkerk.com/Portals/0/files/lead_screw_technology_engineering_data.pdf

Also check your machine for rigidity / tightness of all components and also for any lateral movement at the tool tip when stationary (and disconnected from the supply  )

The problem with backlash is that the total amount is very dependant on tool loading. You can set up a machine for zero backlash with a D.T.I but as soon as it is put into operation, the deeper the cut or greater the tool loading then the greater the backlash that starts to appear. Another important factor here is having good quality and sharp tooling (dull cutters are best consigned to the bin, unless they can be resharpened cheaply enough).

Tweakie.

6340

General Mach Discussion / Re: Help with circles

« on: September 12, 2011, 06:31:20 AM »

Isaac,

That effect can be caused by backlash on your X axis. Have you checked the axis for any slack or lost movement ??

Tweakie.