HW needed:
- screws M3x6
- screws M3x10
- 1pc set screw M3x6
- 1pc screw M3x12
- 2pcs nut M3
- 4pcs 608 bearing (8x22x7 mm)
- bell, diameter max 55 mm, height max 65 mm: Aliexpress 1, Aliexpress 2, ČR
- N20 mini motor with gearbox, 6V, 200 RMP: Aliexpress
- 6V DC power source
Optional HW:
- Remote control over WiFi: Sonoff SV WiFi relay switch low voltage: Aliexpress, ČR
- For discontinuous ringing: Cycle Digital Time Delay Relay Trigger: Aliexpress, ČR
Before the print:
- Headstock is made for specific bell. In case you use different bell, some adaptation might be needed.
Print instructions:
- PLA
- 0,2mm or 0,3 mm layer height
- MOTOR_MOUNT, DRIVE_WHEEL, DRIVEN_WHEEL and AXLE with 100% infill
- Use 3 perimeters for stand and headstock.
- Motor is little bit on the noise side when under the load, so I recommend to print MOTOR_MOUNT and MOTOR_HOLDER from softer TPU.
Print postprocessing:
- Remove custom support from STAND_A and DRIVEN_WHEEL.
- Tolerances are tight, so some sanding might be needed. But with well calibrated printer the assembly should be smooth.
- Remove bridging in holes in STAND_A and MOTOR_MOUNT.
Assembly:
- Insert M3 nut into MOTOR_MOUNT, press motor mount onto the motor axle and secure it with M3 set screw.
- Axle assembly – from left to right DRIVE_WHEEL, bearing, STAND_A, bearing, MOTOR_MOUNT:

- Secure position of the DRIVEN_WHEEL with superglue.
- Use M3x12 screw and M3 nut to attach bell to the HEADSTOCK.
- Use M3x6 screws to assembly the rest of the mechanism:

- Mount the MOTOR_HOLDER to the STAND_A using M3x10 screws. Pay attention to the orientation, see image above.
- Optional: use holes in STAND_A together with SPACER to mount Sonoff WiFi relay, use M3x10 screws.
- Optional: use holes in COVER to mount delay relay trigger, use M3x6 screws.
- Do the wiring.
- Put COVER on, use M3x10 screws to secure it to the rest of the assembly.
- Optional: put some rubber feet at the bottom to prevent item from moving on the table.
Happy ringing!
Tags
The author marked this model as their own original creation.