Show all posts by user
Discuss any sort of mechanical stuff here: positioning systems, gears, extruding methods, etc.
Re: Printable Motors - 16 years ago
Some more 'tinkering' has adapted this idea to a 3-slot geneva wheel with a 3 pin drive wheel, giving 120 deg per 'tick'.This would have to be reduced 66 2/3:1 to give 1.8 deg steps (200 per rev), which could be achieved by a 3 stage gear box (4:1 + 5:1 + 10:3). Anyone have suggestions regarding the blacklash on the gears, what are 'we' able to achieve in printable gears of these ratios (and noby mungewell - Mechanics
Printable Motors - 16 years ago
Is anyone here working on the concept of printable motors, as a direct replacement for the steppers used on Mendel? I have been tinkering in Inkscape with some designs based around a 4 slot Geneva wheel, driven with a 3 pin drive wheel. The Geneva wheel is then futher geared to give appropriate steps per revolution. The use of a Geneva wheel should make it possible to be more efficient as no hoby mungewell - Mechanics
Re: Ratcheting Z-Axis from X-Axis carriage extremes - 16 years ago
You could have a rigid arm traveling the length the X-axis carriage, so that going to that extreme 'pulls' the mechanism the other way. Simonby mungewell - General New Machines Topics
Re: Ratcheting Z-Axis from X-Axis carriage extremes - 16 years ago
I 'played' some more and came up with this. Any comments on the manufacturability of this would be welcome. Cheers, Mungewellby mungewell - General New Machines Topics
Re: Ratcheting Z-Axis from X-Axis carriage extremes - 16 years ago
If you push the 'red frame' from the right the nut will be ratched the other way ;-) Simonby mungewell - General New Machines Topics
Re: Ratcheting Z-Axis from X-Axis carriage extremes - 16 years ago
I played a little with the concept, and maybe a scheme like this would work: In answer to BeagleFury's questions: 1) Should be 'printable + a couple of springs' (unless someone figures how to do these reliably in plastic), but the main concept for RepStrap is that you don't have a 3D printer at all so you would have to be able to make with hand tools. 2) Could end up with string everywhere. Iby mungewell - General New Machines Topics