Steel Gantry Machine 1500x750x200

**Boyan Silyavski** · 10-03-2015

Originally Posted by JAZZCNC

I know silyavski told you No but he's Wrong it most definatley could whip at that length at higher rapid feeds. 20mm is much better screw to use at this length and won't cost much more in either Money or performance.

Sorry, totally missed that 1500mm. I was thinking about something else. I will have to whip myself

**JAZZCNC** · 10-03-2015

Originally Posted by silyavski

Sorry, totally missed that 1500mm. I was thinking about something else. I will have to whip myself

Argh thought it was strange you saying was fine.. . Lol and Don't Whip your self get a nice fit blonde to do it much more fun..

**Boyan Silyavski** · 10-03-2015

I agree Dean. I was deep into reading about HF plasma grounding and just glanced at it and thought 1500 total length of screw -300mm in gantry legs gives 1200, minus more when he betters the design, so he could go away with that, cause anyways most people don't go faster than 10m/min in real life. And it was 1500mm travel , not screw length. I hope he did not order the screws. Anyways i will buy them from him if that mistake happened. its never a bad thing to have some extra ball screws.

**toomast** · 10-03-2015

No worry's mates! Have not ordered anything yet :) except the whipping blond...

**Sven** · 12-03-2015

I'd change the plate you have now for the Z-axis for a 80x80 steel tube and connect the dust collection to that.
That works really well.

Do put a brace between the mounting of the spindle and the oposite face, otherwise the mount may flex. Probably not as bad as my 35 mm high kress mount but still....

**toomast** · 17-03-2015

Originally Posted by Sven

I'd change the plate you have now for the Z-axis for a 80x80 steel tube and connect the dust collection to that.
That works really well.

Do put a brace between the mounting of the spindle and the oposite face, otherwise the mount may flex. Probably not as bad as my 35 mm high kress mount but still....

I don't quite follow you. Do you have a sample picture how the 80x80 steel tube would work as dust collector?
Dust is the problem that needs solving in my design though. I was aiming for some simple bracket that holds dust extractor tube...some housing with brushes...I need to put it on the drawing.

For spindle mount I will order tha thick cast aluminium version. Nice and rigid I think.

**Sven** · 18-03-2015

Complete with dust shoe:

I have the tube clamped to the z-axis, so it can be set to a height.
The next one would just be on linear rails.

The height of the clamp is only about 30 mm, that requires cross bracing with the rear of the tube or it will flex at high feeds. (It did with this one)
The cast aluminium one is much higer, probably will not need cross brace but you can always add it later, should you need it.

A section of 100 mm pvc pipe can easily be fitted to the 80x80 if you heat it.

Picture of a few years back: