SCX24 LCG Motor mounts

• I'm about to redesign some motor mounts for standard gearboxes including some common motors. I started with the INJORA Purple Viper mount which is unfortunately NOT available as a spare part at the moment
• If interested always try first via cheap/fast prototype BEFORE spending any money

Requirements: SCX24_MotorMount_4mm_Off_9mm_Motor_PurpleViper

• Motor with 9mm hole spacing (similar as INJORA Purple Viper)
• M1.4x8 (4x to bolt on mount to gearbox)
• M2x6 (3x to bolt on lid to mount)
• Matching motor mount screws
• Optional but suggested: Sandpaper for finishing and small washers for the motor mount screws NOT to damage/deform the plastic

Printing:

• I've used simple PLA with about 80% infill and will see about the long-term experience while I don't expect a lot of heat on the motor mount..maybe I'm wrong and will try PETG-CF once I've updated my printer nozzle...
• If you can, try Carbon Fiber Reinforced Nylon (PA-CF), PA6-CF or PA12-CF etc. while I cannot verify the hole measurements at the moment. Happy to know if it worked out if you try!

Finishing: SCX24_MotorMount_4mm_Off_9mm_Motor_PurpleViper

1. Organize all parts
2. Optional: Use sandpaper to flatten the surfaces
3. Bolt on mount to gearbox
4. Pre-attach/remove the M2 screws and use sandpaper again for the mount surface
5. Bold on the lid to mount

Additional information:

• I was looking into standard motor mounts having the motor on one or the other side. (Watching at the pinion gear): Left side provides more clearance against chassis boundaries but lower mounting screw is limited by gearbox (Motor seats about 4mm above spur gear axle) Right side provides lower center of the motor but the motor would break chassis boundaries (depending how much the motor breaks the chassis boundary about 2mm or lower above spur gear axle)
• I've tried changing the standard aluminum designs slightly to reach more rigidity and robustness when 3D printing
• The xmm_Off is the approximate difference to spur gear axle (a negative value would be awesome of course)
• I'm currently thinking about a possibility to further lower the motor by using shorter lower screw in a pocket. The screw driver might reach the screw sufficiently angled...hmmm
• I've attached a drawing to see the tight challenging situation to reach LCG without breaking boundaries: Blue lines within red bars -> 35mm inner chassis distance green spray -> spur gear yellow spray -> motor blue spray -> pinion gear
• I'm looking forward to provide more different ideas for other motor sizes and to get constructive feedback

Category: 3D Printing