Wade gear printing trouble January 21, 2015 08:17PM |
Registered: 9 years ago Posts: 6 |
Re: Wade gear printing trouble January 22, 2015 10:45AM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: Wade gear printing trouble January 22, 2015 11:11AM |
Registered: 9 years ago Posts: 6 |
Re: Wade gear printing trouble January 22, 2015 12:44PM |
Admin Registered: 17 years ago Posts: 7,879 |
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janoc
Concerning the kit:
The machine works nicely - I was really surprised how rigid and stiff the thing is! It certainly doesn't look like it, but I am used to aluminium and steel machinery, so it was a nice surprise.
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However, you really should adopt the revised Y axis idler with the tensioner (e.g. this one: [www.thingiverse.com]) for the future versions. The current design is quite wonky, making it hard to tension the belt and to keep the idler fixed in place as the screw cannot be tightened completely in order to not crush the dibond or crack the plastic.
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The other issue that I have noticed is the design of the X axis, that makes the left side "jump" when the Z axis is moving down, because the left side is lighter (there is no heavy motor there). I have put a temporary weight there to make it rest on the brass nut and reduce the binding on the rod. That is probably my only peeve with your kit.
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I have also a comment about the documentation - it is generally excellent and detailed, but it would be really helpful to have photos of the real machine/parts and not only the rendered parts in the manual - I have never built one of these before and it took me a while to realize how (and which!) things fit together in a few cases. Especially the parts where wires are to be routed - they aren't visible on the renderings.
Re: Wade gear printing trouble January 22, 2015 02:12PM |
Registered: 9 years ago Posts: 6 |
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nophead
3mm DiBond is as stiff as 2.8mm solid aluminium and stiffer than 6mm acrylic.
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nophead
I don't find this a problem at all on my machines. I simply tension it with my thumb on the idler and my fingers over the edge of the DiBond. I tighten it just enough to hold, then swivel it to get the belt to run in the middle and then I tighten it some more. It never slips after that, even after years of running I don't need to touch it again.
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nophead
I think you have some misalignment of the Z bars causing binding. Gravity should be enough to keep the both nuts pressed down.
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I don't use photos because they can only be taken when building a new machine to the latest specification. When I change the model all the diagrams change automatically and I don't need to build a new machine.
Re: Wade gear printing trouble January 22, 2015 02:36PM |
Registered: 10 years ago Posts: 541 |
Re: Wade gear printing trouble January 22, 2015 04:30PM |
Registered: 9 years ago Posts: 6 |
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neildarlow
I found it convenient to print both Wades gears and the spacer together at the same time.
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Regarding the X-axis, I assembled my kit very carefully and it has been printing excellently but I recently looked at the top of the threaded rods during a homing operation and noticed they were drawing circles instead of running true.
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I devised a method of placing the X-carriage halfway up the rods and loosened the threaded rod clamps, couplers and Z motor mounts then tightening them in a sequence that distributed any rod errors between top and bottom of the Z-axis. The threaded rods now rotate nice and true at both top and bottom. It eliminated a small squeak that sometimes occurred during homing and I experience no problems whatsoever with vertical motion. The fact that one end has a motor while the other does not has no influence on my machine's operation.
Re: Wade gear printing trouble January 22, 2015 04:49PM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: Wade gear printing trouble January 22, 2015 04:53PM |
Registered: 9 years ago Posts: 6 |
Re: Wade gear printing trouble January 22, 2015 06:16PM |
Registered: 9 years ago Posts: 6 |