Recent content by thorq

Made a second drawing (actually this is more closely inline with my original idea): But then again, if the gap needs to be there (which is quite obvious), there will always be backlash unless split-gears preloaded against each other are employed...

Hello guys, I am quite unsure if this application I have will be zero backlash using the solution in the attached image. I don't really have any means to test this so asking around sounds like a good feedback chance. I haven't decided yet on the preloading solution but it will be done so that...

I prefer complication in design and dumbness in mechanics. It would have been common sense to do this with a timing belt but instead I opted for Dyneema/Kevlar string. The tension on the string will be applied in such a way that it will be kept in the grooves, provided the grooves are the...

Ok, I think I've found my error after a while. I haven't even wrote it in the description of the issue because I couldn't see it. So my calculations are ok except that after I get the 3deg angle for the helix on the larger cylinder/drum, I have wrongly calculated the pitch of the helix based on...

Hello, I have a problem that seems to have beaten me. I want to make a cable-driven reduction system between a threaded rod (pinion) and a larger threaded cylinder. Because of string walking, the string between the two has to stay at all times straight, parallel to the ground so that...

Hi, I have found this video of a slider crank-style mechanism that shows a way to work around the singularity. This is quite the same I've seen about Robot Arm on How it's Made but when I saw that video it didn't occur to me that one of those belts was for this. I was really hoping for...

Exactly about these issues I have opened the thread. I need a way to avoid these situations. Many systems use rotational components and surely they have these weak points too. And they use some solutions to work around those. The variable resolution in motion can be quite easily handled in...

This slider-crank is very easy to build compared to a rack and pinion and the way I am going to move it requires this kind of design. I would really want to find a solution based on the proposed design. My only solution to avoid the singularity would drastically decrease my Z height capability...

Hi, I am trying to design a lifting platform for light duty loads (3d printing build platform) that only uses rotation for its actuation. I have a design that uses a mechanism similar to the slider crank and I want to maximize the total height the platform can travel. This is a sketch of my...