Trapezoidal leads screw in the 3D printer, solution of axial backlash

thingiverse

Features: useing the leads screw in raw unmodified form only two radial bearing and two axial bearing per axis the price is up to $ 15 per axis Solutions for use trapezoidal leads screw in the Y axis with a 3D printer. The proposal is optimized for AL profiles 30x30mm.The problem with springing belt and alia by drawbacks can be solved by using a trapezoidal screw.Speeds can then be catch up with using 24V for the steps motors, which then can be run at higher speeds with the same torque as on the 12V. Here it is necessary to solve the axial backlash in receiving a bolt and axial backlash nut on the screw. The nut can be used Anti-Backlash Nut e.g. here:http://tinyurl.com/zmrng67. For lead screw are commonly used angular contact bearings which are backlash eliminate. But it is necessary to have machined ends of the screw. This is often difficult and challenging, and it can not be done at home. This solution allows the use of leads screw in raw unmodified form. Is enough to 2pieces 608 radial bearings, 1pieces axial bearing F4-10 and 1pieces axial bearing F6-12. The entire solution can fit up to 15 USD, including the lead screw and nut. Because in this solution can not use the flexible coupling, but must be used rigid coupling see eg. here:http://tinyurl.com/jmrjdzy Everything is assembled such that the loose coupling on the motor shaft, but the engine is tightened at least two screws, then eliminate axial backlash with the Bolt Pretensioner at the end, then tightened by the coupling on the motor shaft, then loosen the engine and after rotation of the screw is again tightened by all four screws. Axial backlash is 0.0 mm now. Update 23.jan. 2017 19:40 MotorHolder for Lead Screw exactly 300 mm Update 10.10. 2017 15:40 Solution for X-axis Lead Screw 365 mm lenght AL profile 30x30mm sizes: 3 pieces X axis 320mm 2 pieces Y axis 320mm 2 pieces Z axis 360mm Radial bearings 608 4 pieces Axial bearings F4-10 2 pieces Axial bearings F6-12 2 pieces Lead Screw & nut anti-backlash X axis 365mm 1 pieces Lead Screw & nut anti-backlash Y axis 300mm 1 pieces Lead Screw & nut anti-backlash Z axis 300mm 2 pieces X carridge is modified from Prusa I3 MK2 to screw version see http://www.prusa3d.com/prusa-i3-printable-parts/ exactly for Prusa I3 MK2 extruder. The assembly procedure and definition backlash is similar as to the Y axis, see above Tightening the clutch on the engine shaft is made from behind the hole on the engine bracket. More of details and possible queries via email or comments