Rotary Delta,
inspired by the Icepick Delta Project this is my latest Version of a Rotary Delta. Most of the Parts are printed. You need a workspace of 300x300mm to be able to print all Parts.
I used PETG as material and an infill-ratio of 50% with 4 Perimeters and 4 Top & Bottom Layers. You should be familiar in using manuel placed supports. I oriented the STL files as I printed them. I recommend to alaign your Printer as good as possible in X/Y/Z orientation because this will have an effect to the accuracy of the machine.
You will need following Parts for the assambly:
-> Bearing 608ZZ 18x
-> Bearing 696ZZ 18x
-> Shaft, Diameter 6mm, length 52mm 6x
-> Shaft, Diameter 8mm, length 82mm 3x
-> Shaft, Diameter 8mm, lenght 145mm 3x
-> Hexagonal Spacers, lenght 20mm, M4
-> Carbon Rod, Diameter 30mm, Inner Diameter 28mm, lenght 173mm, 3 pieces
-> Carbon Rod, Diameter 8mm, lenght 375mm, 6 pieces
-> 11mm Steel Balls with M4 Threads
-> Opto Endstops
-> Super-Glue
-> Nema 17
-> HTD 3M 9mm Pulley, 40 teeth 3x
-> HTD 3M 9mm Pulley, 20 teeth 3x
-> HTD 3M 9mm Pulley, 14 teeth 3x
-> HTD 3M 9mm Belts,
-> HTD 3M closed belt with 174mm 58 theeth, 3x
-> Aluminium-Shaft, Diameter 28mm, Lenght 122mm, M5 Threads on Bottom & Top
Some Values for FW-Setup:
Base-Radius: 80mm
Effector-Radius: 35mm
Arm-Lenght: 190mm
Rod-Lenght: 394mm
Angle when homed: about 46.50° (When you measure the arm-angle on bottom of the Carbon-Rod you have to substract 7.9° to get the correct angle)
Stepps per deg with x32 Micro-Stepping and 1.8° Stepper: 391