Messages

7731

General Mach Discussion / Re: help in setting up needed for a noob

« on: September 03, 2010, 01:33:19 PM »

Ben,

If you have a continuity tester / meter you can identify the motor wires. Two wires are connected to one set of internal coils and two wires are connected to the other set of internal coils. Check for continuity then connect this pair to A+ / A- check for continuity and then connect the other pair to B+ / B-. It doesn't matter which way round the pair of wires go, as the direction of rotation is taken care of later in the Mach settings.

Tweakie.

7732

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: September 03, 2010, 01:06:17 PM »

I have not yet decided just how I will be controlling the Synrad RF laser but whatever system I use i am going to need a 'tickle pulse' generator so at least this is one part I can start making already. The required circuit is extremely simple and I like simple.

The 'tickle pulse' generator has to supply a stream of 1uS pulses repeated every 200uS  (5kHz) and this keeps the gas on the point of lasing and in readiness for the trigger or firing pulse which will in turn be a pwm stream ranging from 10% to 100% mark space ratio.

The finished controller will be modular in construction and this little pcb will just be incorporated into the main pcb (at least I think that's the way it's going to go).

This little pcb has been isolation routed, now to solder on a few components and test it out.

Tweakie.

7733

General Mach Discussion / Re: Milling marks????????

« on: September 03, 2010, 05:34:59 AM »

Just a thought, well a wild guess really, I had a problem which looked similar to this which was caused by tiny particles welding to the cutter tip and making unwanted gouge marks. This was with polycarbonate - the same problem did not occur with Plexiglass / acrylic.
Could you perhaps try a different material, with a higher melting point, and then see if the same problem occurs.

Tweakie.

7734

FAQs / Re: help me plz

« on: September 03, 2010, 02:14:27 AM »

Have you selected the MaxNC Mode in the Mach Config / Port setup ?

Tweakie.

7735

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: September 01, 2010, 04:24:02 AM »

Amir,

Second user they go at about $500.

http://cgi.ebay.com/Synrad-25W-CO2-Laser-Model-F48-2-285W-Great-Condition-/300456367802?pt=LH_DefaultDomain_0&hash=item45f49856ba

(all I need now is the galvo head  )

Tweakie.

7736

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: September 01, 2010, 03:44:23 AM »

It's only a baby Dan, weighing in at 25 Watts.

Tweakie.

7737

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: September 01, 2010, 02:40:22 AM »

I am still awaiting the delivery of the power supply, so I can try it out, but this baby could spell the makings of a whole new machine.

Tweakie.

7738

Show"N"Tell ( What you have made with your CNC machine.) / Re: 3D Printing.

« on: August 27, 2010, 08:23:54 AM »

Thanks for the links Martin.

As we have seen there are so many different ways / methods of 3D printing it would be really nice if we could get together a group with each working on a different method. Not as a competition but more of a combined technology sharing exercise and of course all driven by Mach as the common factor.

Tweakie.

7739

General Mach Discussion / Re: twinned motors; 2 sharing 1 driver

« on: August 27, 2010, 02:15:37 AM »

I think you have just wasted some electrons Bob. 

Tweakie.

7740

General Mach Discussion / Re: Just a THANKS

« on: August 27, 2010, 02:12:19 AM »

Hi Mike,

Very nice gesture.

Don't suppose you could buy some beers ?   

Tweakie.