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It depends on how you want to produce the PCB.

If you want to isolation machine it, then you'll need to draw it in CAD of some kind.
If you want to etch it, you'll need it drawn in something that...

How meny times have you cut this.? If you have cut it a few times did it happen in the same place.? If not then try again and see if it happes in same place.

If it does then I very much doubt it's...

This does sound increasingly like the Z-axis is loosing position. Are you sure pulleys or something else on the Z-axis has not worked loose?
Although changing the plunge rate could solve the problem...

There is also these folks who I have never had a problem with and they are about a 6 day wait normally : www.sorotec.de Good prices as well.

Michael

Cutwell tools have coated micrograin solid carbide rib processing cutters that have decent reach and last for ages in wood look here.

http://www.cutweltools.co.uk/files/ww/2 flute rib processing...

James, there are a few programs around to convert raster files to dxf files. You can also import a raster image into some versions of autocad then draw around then and save as dxfs. Ive done this a...

You could always buy/make your own low powered laser and fit it to your router http://www.cooperman.talktalk.net/files/18.htm here's an interesting site where someone (cooperman) has done just that,...

Most CAM programs accept *.DXF and/or *.STL files, and the following link says Blender does export in those formats ... so yes it looks like you can.
...

Look for a program that does 'vectorising'. Vectorising is converting an image to vectors, i.e. lines.

I've done it with the CAD program I use, see attached... can fiddle with the settings for you...

I clean it with the compressed air, or just wipe it. It's not too bad with aluminium though as the swarf is big chips and I've not cut wood for a long long time, except a quick bed surface.
...

Try cutwell tools they sell high quality Collet chuck nuts, both standard and balenced as well as slim line nuts. The balanced ones are the notched type thou and will require a matching wrench which...

James

Pop along to your local kitchen fitters and ask for the offcuts from the sink holes, thats what i used for last machine. Normally a drink in exchange is suffice ;-)

A small triangular file will fit standard metric threads perfectly for clean up/repair purposes.

It's M12x1 ... and I've got an M12x1 tap and die so just bring it along and we can sort it :)

I take it you're going to replace the bearing clamp nut with a thread in the pulley. If so you'll need a more positive location for the pulley, one grub screw just won't be enough. Possibly a pin...

James,
it shoudnt matter which way round you mount the bearings. Keep up the work, your doing well. Can you post a photo of where the parts dont meet so we can get a better idea of whats happening?...

Your waiting is over:

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My home, gradually filling up with swarf...

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Just off out now but I'll do one tonight using Draftsight and Vectrics Cut 2D if that suits ?

Post a bit of a sketch of the shape if you can.

Yes they do look worth copying for £20 each...

More parts for you:

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The bore of that last ballnut mount came out very shiny. I used a polished carbide tip in the boring...

Don't buy cheap micro switch's for home switch's they wear to fast and not accurate enough. You only need 1 for each axis (2 on slaved axis) so buy decent switch's like honeywell or Telmanique they...

Yes that's fine, we can measure it and try another bearing in case it's the bearings at fault.

PM754 from Zapp is good - that's where I got them, but now there's cheaper available on eBay:
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Divers from http://www.slidesandballscrews.com and try this one PM752 Microstepping Driver

Transformer and electronics from http://uk.farnell.com
At least I bought there :)

Also, this on is marginally cheaper and with best offer perhaps significantly cheaper?
...

Does this look ok?

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Hopefully you can open it in sketchup:

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