STEP file Hole wall clock 🕰️ ・3D printing concept to obtain・Cults

UPDATE 2 – 28BYJ-48 stepper compatibility
I’ve added designs to the set of recordsdata that will let you use the 28BYJ-48 stepper as a substitute of the NEMA 17.

To construct a clock based mostly on this stepper, it’s essential print the recordsdata:
– 28BYJ-48_mounting (as a substitute of NEMA_mounting)
– minutes_drive_gear (30_10) for 28BYJ-48 (as a substitute of minutes_drive_gear (30_10) for NEMA).

Observe that the development based mostly on the 28BYJ is initially assembled a bit in another way – first you set the “28BYJ-48_mounting” into the case, then you definitely put the stepper on it after which “cowl” by the “again plate”. The latter has holes for screwing within the screws that safe the stepper.

UPDATE 1:
I’ve added an assembling device to the file set – a form (consisting of two components) that makes it simpler to assemble the circles with arms.

The system (stand) helps the circles whereas they’re being mounted on the management/drive unit.

I like to recommend utilizing at the least two such stands.

A hole wall clock consisting of a management/drive unit and two hanging circles with arms.

The offered mannequin is powered by a NEMA stepper motor (work is underway to develop a drive by a 28BYJ-48 motor).

A 50×70 mm PCB is positioned contained in the housing, on the again.

Along with the printed parts, you want:
– a NEMA 17 stepper motor (most physique size 33 mm)
– 6 bearings11/5/5 mm

The set of recordsdata contains:
– case – exterior housing with screw mounts for screwing the mechanism (it needs to be printed with helps, entrance to printed-bed). The housing has been ready in two variations – with air flow holes and with out air flow. Relying on the ultimate form of the mission, it’s value putting an extra gap for the ability cable on the backside of the housing.

• NEMA mounting half – aspect connecting the NEMA motor to the housing

• back- mid- front-plate – three parts on which the drive gears and bearings on which the circles with the arms “roll” are mounted .

• minutes_drive_gear (30_10) for NEMA – gear placed on the motor shaft, driving the minute gear (NOTE: earlier than putting in this gear, place the NEMA motor with the mount within the housing and canopy it with the back-plate).

• interm_gear (28_7) – intermediate gear transmitting the drive from the minute gear to the hour gear. The gear is hooked up to the protrusion on the back-plate, utilizing a bearing.

• hours_drive_gear (30) – gear driving the hour gear. It’s mounted (by means of the bearing) along with two bearings from the “inside” aspect of the front-plate.

Palms gears:

The set contains two sizes of hand gears – one approx. 37 cm (360 tooth) and prints approx. 73 cm (720 tooth). The recordsdata are marked accordingly.

Because of their measurement, the hand gears have been divided into components that permit printing on printers with a working space of ​​approx. 20x20cm.

The components have been ready in order that they are often related collectively (I additionally used glue).

On the again of every aspect are the markings “M” (minute circle) and “H” (hour circle).

The 720-tooth gear have been divided into 12 equal components. When printing from components, it’s essential print 11 parts with out a hand (i.e. 720_hourHand_gear (half no_hand) and 720_minHand_gear (half no_hand)_v2) and 1 aspect with a hand (720_hourHand_gear (half w_hand)_v2 and 720_minHand_gear (half w_handPart)).
A minute and hour gears are wanted for the whole development.
The minute hand has additionally been divided into components attributable to its massive measurement (extra aspect: handPart for 720 minHand_gear).

The 360 ​​tooth gear have been divided into 6 equal components. When printing from components, it’s essential print 5 parts with out a hand (360_hourHand_gear (half no_hand) and 360_minHand_gear (half no_hand)) and 1 aspect with a hand (360_hourHand_gear (half w_hand) and 360_minHand_gear (half w_hand)).
A minute and hour gears are wanted for the whole development.

IMPORTANT: when assembling the clock, set each arms (minute and hour) to 00:00 earlier than screwing the entire thing collectively!

I used M4x50 screws to assemble the entire thing. An acceptable place for nuts of this measurement was ready within the housing.

Drive mechanism:

The gear driving the minute hand gear (related to the stepper motor) has 30 tooth – to maneuver across the minute hand, the stepper should rotate 12 occasions for a 360-tooth gear and 24 occasions for a 720-tooth gear.
The transmission of energy to the hour hand is identical as in a traditional clock 1:12 – 12 revolutions of the minute drive lead to 1 revolution of the hour drive.

#CLOCKSXCULTS