Messages

4261

Show"N"Tell ( Your Machines) / Re: Custom Coil Winding Machine

« on: January 06, 2015, 05:34:50 AM »

Perhaps, as a starting point, check out Brian & Benny’s Coil Winder Screen. http://www.machsupport.com/software/downloads-updates/screensets/
I think this should provide you with a good basis for your intended project.

(I have recently used a modified version of this screen for, single layer, Guitar string winding http://www.machsupport.com/forum/index.php/topic,28721.0.html still a long way to go but getting there slowly).

Tweakie.

4262

Show"N"Tell ( What you have made with your CNC machine.) / Re: I'm in Hog Heaven

« on: January 05, 2015, 01:51:13 AM »

Excellent work Craig that is just brilliant.

Tweakie.

4263

Show"N"Tell ( What you have made with your CNC machine.) / Re: Guitar Strings.

« on: January 03, 2015, 12:33:20 PM »

Hi Terry,

The test rig just has a felt pad friction type of tensioner for the wrap wire - it works but it is crude and only suitable for testing.
I am not yet sure of the benefits but measuring the wrap wire tension as close as possible to the actual wrap seems to be favored so I am currently working on an electronic device which uses a rotating version of the conventional 'dancer' to measure the actual tension in a feed-back loop to a disc brake on the wrap wire spool. This will be fully adjustable, for the different wrap wire diameters, and provide 100% repeatable results - assuming it works.

The full size machine has just gone through it's third rebuild but I think it is going to be a long way off before it will be winding a full set of strings.  

Tweakie.

4264

Show"N"Tell ( What you have made with your CNC machine.) / Re: Guitar Strings.

« on: January 03, 2015, 11:22:24 AM »

A short video winding nickle wrap wire onto a music wire core.

https://www.flickr.com/photos/tweakie-cnc/15565495153/

At the moment tests are limited to 2,000 rpm as I have encountered technical issues when running these 200 step per revolution motors at speeds over 2,500 rpm.
I am currently awaiting delivery of some different (24 step per revolution) motors which should be good up to 15,000 rpm whilst, hopefully, still having sufficient torque for the job.

Tweakie.

4265

General Mach Discussion / Re: Z-axis goes deeper dan indicated by G-code file

« on: January 01, 2015, 02:39:45 AM »

Hi Wadero,

If it would be of any help to you - zip and post a copy of the Gcode which has the problem I will run it and see if the problem occurs here.

DRO  is consistent with position and not with the instruction.

One possible explanation is that you are mixing G90 / G91 commands in an incorrect manner.

Tweakie.

4266

General Mach Discussion / Re: Just a general question…

« on: December 30, 2014, 02:25:44 AM »

Thanks again Terry – I will try that.

Tweakie.

4267

General Mach Discussion / Re: Just a general question…

« on: December 29, 2014, 02:19:00 PM »

Thanks Terry - I am not sure just how I do that but it something I never would have thought of checking.

Tweakie.

4268

Show"N"Tell ( What you have made with your CNC machine.) / Re: Guitar Strings.

« on: December 29, 2014, 02:16:44 PM »

Thanks Terry - excellent information my friend. 

Tweakie.

4269

Show"N"Tell ( What you have made with your CNC machine.) / Re: Guitar Strings.

« on: December 29, 2014, 02:33:58 AM »

Thanks guys for the kind words and encouragement. As soon as I can I will make a short video of the test-rig in action. It is rather crude and does not incorporate the refinements of the actual winding machine but it does demonstrate the principle.

‘WOW with the VAST variety of guitar strings and I do mean VAST. I cannot image needing to wind your own.’

I am inclined to agree with you on that one Terry – I am really not sure why but, as we say here, “There is nowt so strange as folk” 

‘But getting the proper tension on the winding wire AND the core wire might pose a problem.’

I have found that getting an exact, ‘pre-defined’ tension on the core wire is extremely easy but an exact, ‘pre-defined’ tension on the wrap wire may yet require a bit of cunning electronics (on the test-rig the wrap wire tension is set by ‘trial and error’ but, as yet, I have no way of measuring it precisely).

There are still a number of technical issues to be overcome but I am getting there slowly.  

Tweakie.

4270

General Mach Discussion / Re: Just a general question…

« on: December 29, 2014, 01:23:52 AM »

Thanks Hood, I am sure you are correct.

Tweakie.