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Messages - Tweakie.CNC

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5401
Brains Development / Re: PCB Milling bits
« on: March 06, 2013, 02:36:44 AM »
Hi Peter,

As TP says, this is really the wrong thread for your question.

However, I use the little engraving bits (available from China via ebay) - some are better quality than others, although they all claim to be carbide but they are cheap enough to take the chance.
The Dremel may not be the best spindle to use (the front bearing is not that well supported) but if you use fast speed and shallow cuts it will make a reasonable job of fine work.

Tweakie.

5402
General Mach Discussion / Re: Interested in Low Power Laser Engraving
« on: March 06, 2013, 02:10:14 AM »
Hi John, Terry,

The crystal block 3D stuff requires a wavelength of typically 1064nm (as opposed to the 10600nm of the CO2 lasers) so YAG lasers are more often used for this type of work. (This is bit of a specialised area involving reasonably costly equipment which can also be quite expensive to run).

Tweakie.

5403
Hi Miles,

Welcome to the forum.

Try LazyCam (it comes free with Mach3) - it can convert HPGL(2) to GCode.
Providing the HPGL file size is not too large it makes a reasonable job, allows scaling and some limited editing etc.

Tweakie.

5404
General Mach Discussion / Re: Licensed Mach 3 Stopped mid project.
« on: March 04, 2013, 12:21:52 PM »
Hi Josh,

Welcome to the forum.

Try turning off the toolpath display (just above the Reset in the Diagnostics window) before you run any long programs.  ;)
(I think the problem may relate to graphics card capabilities but turning off toolpath display usually works).

Tweakie.

5405
Hi Scandi,

Welcome to the forum.

Does this help ?  http://www.machsupport.com/forum/index.php/topic,11409.0.html

Tweakie.

5406
General Mach Discussion / Re: How many times have you read this
« on: March 03, 2013, 07:55:16 AM »
Hi Jim,

Welcome to the forum.

In my opinion Velocity and Acceleration are best found by 'trial and error' for each axis in turn – starting very low then working your way up until steppers stall then reducing the settings by at least 30% to achieve reliable performance.

I recommend you use your 1/8 micro-stepping rather than whole steps though.

Tweakie.

5407
Hi Fefenin,

Welcome to the forum.

Going off at bit of a tangent…
Obviously it depends on your intended X axis speed but I have found that the Mach3 PWM is not updated fast enough to be really useful for laser power control unless you only require infrequent changes, such as when vector engraving then profile cutting etc.

I would be interested to know what type of laser engraving work you are planning?

Also you may find this thread (and others links within that thread) of interest; http://www.machsupport.com/forum/index.php/topic,23584.0.html


Tweakie.

5408
Hi Andrew,

Welcome to the forum.

Something you may wish to consider, as an alternative approach…

A couple of years back I needed an oil-mist solution for my little mill so I purchased a small compressor (intended for a domestic refrigeration unit) which is piped to a (1.5mm internal diameter) nozzle aimed at the base of the cutter. In the air line I use an adjustable ‘air tool oiler’ and this provides the necessary oil mist spray as well as a reasonable amount of chip removal and it runs continuously during the job.

It may depend on your ambient air temperature but I was initially concerned about running the compressor for extended periods but as it is not working hard  (it is being used more as an air pump rather than a compressor) it has not overheated or shown any signs of distress after many, many hours of use now.
The oiler has to be checked and refilled, if necessary, before each job but I am sure that larger units are available should you need to use a greater volume of oil mist than I do.

Just a suggestion.

Tweakie.

5409
Hi John,

I am pleased to hear that you got it all working OK.

Quote
First, I'd like to use the code as a macro in a program so that after a tool change I can just call the macro from the code - say "M100" - and it will set the tool height then let the program continue.  So I have copied the button code into a file and given it the name M100.m1s, but when I insert that code in a programme or type it into the MDI window, nothing happens!  There's probably something simple I've forgotten about or never knew - any ideas please?

I can't help with this one as it's not something I use and have a sound working knowledge of - but I am sure there are others who can help.

Quote
The second thing is that I would like to generate modified code to set the X and Y zeros, using an isolated probe of known diameter I've made.  As you are the copyright owner, may I have your consent to this please as my code is likely to copy many of the same lines?

My code is yours to do with as you please - it is my pleasure sir.

Tweakie.

5410
Tutorials / Re: Video Tutorials for Mach
« on: March 01, 2013, 07:51:44 AM »
hey ppl ^^ pleaaaaaaaaaaaaaaaaazzzzzzzzzzzzeeeee hhhhheeeelppp mmmmmeeeeeemee i want to download all the videos  in here http://www.machsupport.com/videos/  i have tried so many programes but i couldn't =( pleaaaaaaaaaaaaazeee help me !!!! i will suicied here if u don't :p
plz ='(

See the reply to question here http://www.machsupport.com/forum/index.php/topic,23855.0.html

Tweakie.

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