Hello to all again! I'm defining my router design after some months of inactivity. I already defined my steel frame and purchased the iron to start building it. The idea is to use the router mainly for wood and melamine boards. Eventually I may use it for aluminum but that's not the main purpose of the machine.
Since you guys have lots of experience I would like to ask for advice to define two main concepts for my design: 1- Should I use helical or straight teeth racks and pinions? I plan to use some chinese rack and pinions (MOD 2 with 30 teeth pinions rotating at a max speed of 200 RPM) for the obvious reason of the budget. But I can get hardened and ground rack and pinions so I think that sounds pretty good. Anyway, I think I should stick with the straight rack and pinion since it's the simpler solution and being hardened and ground I think they will behave pretty well but I would like to hear your opinions. 2- For the servo-to-pinion reduction: Planetary servo reducer or worm and gear reducer with timing belt? I'm thinking about the worm and gear because I can machine that in the shop and reduce at least the apparent cost (I say apparent because I still will have to make more complex mounting plates for the servos and reductions..) but also I'm tempted to buy something like this: https://www.aliexpress.com/store/product/high-Precision-Helical-planetary-gear-reducer-5-arcmin-2-stage-ratio-15-1-to-100-1/1155094_32867566227.html?spm=2114.12010612.8148356.28.1b5476fa9wYyAW Do you think they are worth it? I have no experience with this kind of reducers but the seller has good reputation and sells Delta servo motors wich I'm familiar with and work great. What do you think? In any case, I plan to mount encoders coupled directly to each pinion so I can always track the position of the pinions no matter the backlash I have in the reduction stage (but off course I want backlash to be the minimum possible). Those are my concerns for now. Please tell what you think so I can make a better choice. Thanks as always to all of you! Leonardo _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
