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On Sat, Aug 19, 2017 at 11:38 AM, Hrvoje Lasic lasich@gmail.com wrote:
Ok, so correct me if I am wrong but you are asking some mechanical questions.
mechanical / physics, yes.
so, I speak in general now and if you have question ask deeper.
Force needed to drive whatever you want to drive will be exactly the same at the end part of system.
on the print-head yes. but because of the doubled speed, the DRIVE end *NO*, the force is NOT the same.
But efficiency of belt system could be slightly different then efficiency of `non` pulley system (whatever it is). But again, efficiency could be neglected for sake of easy of calculation or you can put around some value that (guess) could be 80-90%.
i'm assuming that there are no significant losses around pulley bearings.
What you will be looking is gear ratio on pulley that could alter force/speed ratio and same thing on other system.
the gear ratio on a single pulley system is 2:1.
also, you will be looking on backlash.
*thinks*... backlash should be reduced (halved) due to the better effectiveness of the pulleys - assuming that there is no "play" in the bearings (we can assume decent bearings / idlers).
l.