Messages

8221

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

« on: September 04, 2009, 11:23:39 AM »

Warning label (engraved into traffolite) for the front of the PSU. First time I have tried this, it was 'raster' engraved rather than 'vector' and it took forever.

Tweakie.

8222

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

« on: September 03, 2009, 10:34:12 AM »

The new PSU enclosure is now, more or less, complete - just the protective earth terminal and ground strap for the lid and a small EM screen and thats it.

8223

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

« on: September 03, 2009, 03:39:38 AM »

Already tested the theory Sam and Super Kitty can prove it.

Tweakie.

8224

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

« on: September 02, 2009, 08:33:42 AM »

Thanks Guys,

Afraid I can't take all the credit for the box. I cut the ally on a guillotine and used a band saw for the cutouts, cleaned the edges to the scribe marks with a sander, then bent it in a V block on a fly press (thanks to a local machine shop). The TIG work was done by a professional (I am OK on SS but you would not want to see any of my ally TIG work  ).

Let you know about the thin foil Dan when the project is finished.

Right on Sam but did you know that CO2 lasers are, apparently, better at burning corneas than they are at retinas because eyeballs are quite opaque at the far infrared (not that it makes that much difference though). 

Tweakie.

8225

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

« on: September 01, 2009, 03:19:16 AM »

The psu has arrived from China. This unit consists basically of a TV line output transformer capable of producing some 18,000 Volts which is on/off switchable, with a short rise time, from a TTL signal and current adjustable from a 0 - 5 Volt analogue input.
I will need to construct a new enclosure for this unit so that it can be fitted safely to the framework of my machine and this is the progress so far.

Tweakie.

8226

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

« on: September 01, 2009, 01:57:09 AM »

Mountings for the HeNe alignment laser made the same way as the main tube mountings.

Tweakie.

8227

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

« on: August 31, 2009, 02:52:06 PM »

Think it should just about be able to cut a bit of acrylic - will be a pretty expensive mistake if it doesn't. 

Tweakie.

8228

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

« on: August 31, 2009, 02:48:18 PM »

Hi George,

Any chance you could post some pictures of your machine, would really like to see them.

Tweakie.

8229

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

« on: August 31, 2009, 05:08:54 AM »

Not quite sure what went wrong George.

I know that MDF is horrible stuff to cut compared with hardwood as the tool clogs up instantly. I did suggest reducing the feedrate for the first cut to reduce this problem but I must admit that I have never tried to cut the Gemme plaque in MDF.
Perhaps two passes at 1/2 depth each may be the answer.

Tweakie.

8230

Show"N"Tell ( Your Machines) / Re: New Project for the shop.

« on: August 29, 2009, 05:49:51 AM »

Hope they are not left handed like the pictures show. 

Tweakie.