eSCHEn
Bit Wrangler
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No bother mate, happy to be of service
- Thread starter AdrianH
- Start date
Interesting findings with the linger tips etc I reckon I will cut through some extra prts if I was tracing. lol
Could you explain a little more about what you mean about inch tube but offsetting the bearings??
Regards Andy T
Not seen it yet.....lol
Simply put it means that, the centre of the bearings were note along the centre line of the tube but down the edge of the tube.
I do get some errors in copying, so something is off! If copying something I would first trace it from the cutter position to the tracer point and then reverse to make the parts.
If that makes sense?
Adrian
CRB
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Accuracy can be better I guess it is all about making every thing line up with the pivot points including the torch and stylus. Using inch tube helps stop some of the flexing, but means the bearings are offset! I have just been looking in an electronics catalogue to find the style of connector so I can connect into the plasma switch without sticking wires in the pins, so that should make it safer. It has been fun and frustrating to get to this stage.
Adrian
Ideally, though I am sure you know, the pivots and stylus/torch should be in the centre of the tube/arm. Torch and stylus should be easy enough but using a plate with a bush to allow the arms to pivot in the centre, and get close to fully overlapping, is a bit more work. Much easier with lolly sticks.
Brilliant job though, and much cheaper than CNC.
Ideally, though I am sure you know, the pivots and stylus/torch should be in the centre of the tube/arm. Torch and stylus should be easy enough but using a plate with a bush to allow the arms to pivot in the centre, and get close to fully overlapping, is a bit more work. Much easier with lolly sticks.
Brilliant job though, and much cheaper than CNC.
The centre of the tubes should be true but why not if I use the centre line of the bearings? That is what I did, the centres of the bearings are all the same distance and in theory, if I put the stylus on the same line and the torch on the same line then I assumed it would all match. Not saying it does, but my thinking was it should.
If doing again I would make a side by side copying frame. Just takes up more space when not in use.
Adrian
Forgive me for asking but what is a side by side copier???
Have a look at this youtube video and see what I mean, then make it a bit wider and apply a plasma cutter!
Adrian
i can see this is smaller . i can now see how it works from the other video, is this not a lot harder to make? and more expensive?
I guess it would be harder to make as you have to have slide rails in X and Y. How you make them would be up to you. This to me would be more accurate then a pantograph. In the video I linked to, the builder has used box section and slide rollers, this is very similar to what I am doing for my CNC. One could even use door sliders! A piece of say 20mm bar for the cross piece.
Inch square tube is approx £12 for 5 metres. I bought some 2 x 1 inch 3 mm thick erw cut to lengths for £18 so the materials are not expensive, just if you start buying linear bearings etc.
Adrian
http://www.freecarvingduplicatorplans.blogspot.co.uk/ Interesting........No plans there...lol
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