Sinclair ZX80 / ZX81 / Z88 Forums

Gears:

2 Cylinder sides. (right side circle on the picture)

2 Gears from cylinder to head's threaded rod.
(linked by a simple rubber belt/bicycle inner tube)

1 Gear from the motor (15mm) can be ignored.
The both toothed gear from the motor (diam 15mm) and the cylinder (diam 130mm) had to be print in PLA (3D printer) or bay separately.
The PCB board for 130mm diameter gear seem to be expensive.

Kicad v6:
Gerber:
- 4 PCBs at least.
- color black
- PCB Thickness= 1.6mm.
(estimate price 9$ + Shipping for 5 PCB)

Diam:130mm hole:5mm 80 teeth

EDIT : Something's wrong 130mm ?



SLA (resin) / 8228 resin:
(estimate price 6.04$ + Shipping for1 MJF (nylon) model)

Diam:15mm hole:5mm 8 teeth

(estimate price 1$ + Shipping for1 MJF (nylon) model)

STL file:

Cylinder gear: I had to rebuild the gear in Wings3d...
Please let me know if both gears are incompatible.
(Note:Special thought for "Tupperware" in PLA.)

(estimate price 1$ + Shipping for1 MJF ( PA12-HP nylon) model)

STL & Wings3D files:

Belt wheel (32mm) already done on the cylinder sides PCB.
facultative.

fixed by two pins 2mm diameter
(estimate price 1$ per wheel + Shipping for1 MJF ( PA12-HP nylon) model)

STL & my Wings3D files:

Wings3D v2.3 file:

Connect the analogic card:

Hi,

In fact, you have 5 PCB for the cylinder's sides board.
Two double boards (2PCB+2PCB 1.6mm*2 per side)

1 PCB remain and can be use to enclose the gears.

You had to cut it to let the motor and wiring things to pass throw it.

Have fun.

3D case:

Wings3D+STL:
(estimate price 2$ + Shipping for1 SLA resin ( IMAGINE BLACK) model)

Wings3D file only (All Project):