Messages

3761

General Mach Discussion / Re: The solutions to my false limit switch triggering issues

« on: December 11, 2015, 03:20:50 AM »

All this, I think, goes to highlight the benefits of our forum dwelling. We all learn from each other (sometimes from the mistakes and sometimes from the explanations) and the vast pool of knowledge we have all helped to create here has made our forum what it is today.

Keep up the good work guys.

Tweakie.

3762

General Mach Discussion / Re: Recommended Encoders

« on: December 11, 2015, 01:59:45 AM »

Hi Richard,

The 4th axis is generally just used as a rotary axis or slave for 2 motors driving one axis and not used to drive the spindle (although there will always be exceptions  )

The Gecko User's manual (http://www.geckodrive.com/geckodrive-step-motor-drives/g540.html ) gives details of connecting a relay which could be used to switch your spindle on/off - pretty much the same system as you are using at present.

Tweakie.

3763

General Mach Discussion / Re: Vcarving to Letter Cutout

« on: December 11, 2015, 01:27:50 AM »

Increasing the Acceleration settings ( in Motor Tuning ) will reduce the corner rounding.

Tweakie.

3764

General Mach Discussion / Re: The solutions to my false limit switch triggering issues

« on: December 10, 2015, 11:00:31 AM »

I Must admit, I did try writing a guide (for beginners) to wiring a CNC machine about a year ago. http://openbuilds.com/threads/electronics-101.693/

The further I got into it the more I realized just how much of a grey area it really is. Sadly, few of the newcomers to that forum took much notice and all the same wiring mistakes are still being made and re-discovered all over again. 

Tweakie.

3765

General Mach Discussion / Re: Vcarving to Letter Cutout

« on: December 10, 2015, 10:35:30 AM »

What I did do was change my look ahead from 20 lines to 30 lines and took my accel values down from 20 to 7.  Velocity is still set at 750.  Now running at 700 ipm this thing has almost no noticeable jerk movements.  But I do have a question about look ahead.  Is there a top value that I should avoid on look ahead so many lines?  Like 30 seems really good, but still just a tiny bit of jerking around serifs.  Just a tiny bit.  But, I'd like to be perfect on it with no jerking.  Any thoughts?

 Good question Bill, many use a look ahead of 200 so I guess it is a matter for experimentation.

Tweakie.

3766

General Mach Discussion / Re: The solutions to my false limit switch triggering issues

« on: December 10, 2015, 08:26:38 AM »

I definitely understand that information on this issue is hard to comprehend. I have chased those problems too. In fact you probably wasted some time reading my posts.

I am sure time was never wasted, everything was just added to the knowledge base. 

Tweakie.

3767

General Mach Discussion / Re: Vcarving to Letter Cutout

« on: December 10, 2015, 07:33:23 AM »

Hi Bill,

It has a lot to do with the post processor you use to create the Gcode from your CAD/CAM software.

For example...

Vectric has Mach3 post processors (which will create the Gcode to process circles as a series of straight lines) and Mach3 arcs post processors (which will create the Gcode to process circles as a series of arcs) - most CAD/CAM (that I have used) have similar options.

Tweakie.

3768

Mach SDK plugin questions and answers. / Re: 5 axis kinematics coming soon !!!

« on: December 10, 2015, 01:49:28 AM »

Video links not working (at least not for me). 

Tweakie.

3769

VB and the development of wizards / Re: G31 Feed Rate can not run less than 130U/min

« on: December 10, 2015, 01:46:38 AM »

I think you have discovered the problem.

Most, if not all, of the Chinese motion control boards fail to implement the GetVar function. 

Tweakie.

3770

General Mach Discussion / Re: Help with duel boards

« on: December 10, 2015, 01:27:19 AM »

Hi Arocky,

Yes, it is possible to do exactly as you suggest.

When you purchase the new PCI parallel port card it may be best to get one which has 5 volt TTL outputs (as opposed to 3.3 volt TTL outputs). This thread may be of interest to you https://www.machsupport.com/forum/index.php/topic,11300.0.html


Tweakie.