Mammoth ARM

What you need:

put two 608zz on the ARM1_wave_generator

add 12 nuts to the ARM1_slew_inner_b

and 3 nuts on back of inner_b

Put two parts together

A M3X6 bolts will do the job

put ARM1_bearing_holder on top of the bearing.

And install 2 M3X20 to fasten the bearing holder.

Like the BASE parts, slew bearing( there are two slew bearing in ARM1) need ∅5mm steel balls

add steel balls to the slew bearing, small gap is needed. (PS. don't forget apply some grease/lubricant.)

in place, and 6 ~ 12 M3X14 bolts to fasten the parts.put ARM1_input_gear_1mX15 to the NEMA 17 motor( high torque one is needed).4 M3X14 to fix the motor.Another slew bearing, as before.6 M3X14 to fasten the ARM1_slew_bearing_inner_part1 and ARM1_slew_bearing_inner_part2, 6 M3X20 fasten ARM1_slew_bearing_inner_part1 , ARM1_slew_bearing_inner_part1 and ARM1_flex_08mX98_v2.

We also need ARM2_connector_to_arm1( belongs to ARM2 parts) for easy assembly ( because we must fasten this to add other parts). Put those together. Don't forget nuts on ARM1_slew_bearing_outer ( If you don't have M3X80 bolts, you can apply M3X40 before you fix ARM2_connector_to_arm1) .Put all the parts together, done.

Printed parts:

other parts:

Insert a nut to BASE_motor_input_gear:

put the motor gear to the stepper.
The hole is too tight, so I'm using a vise to push the gear to the motor.M3X3mm set screw to secure the gear. 4 M3X8 screws to mount the stepper.apply 5mm ball to the slew bearing parts.Don't put too many balls here. Little gap will be fine.A little grease (lubricant) will be great.Put those parts together.put 2 of M3X30 screws in there but don't go too much, we need another part.Put 12 nuts in the outer nut-holes. Put those parts together.fasten the screws, done.

All the STL files uploaded. Happy printing.

All the BASE parts don't need supports. BASE_slew_bearing_outer_with_gear2 Layer height should <= 0.15mm

base print time lapse :

Just uploaded the print parts for ARM2. You can start print, those parts will need days to complete.

If you have any questions, leave me a comment.