At first, I wanted to buy a shooting turntable, but I found that there happened to be two idle geared motors. So, I wondered if I could do something. Without further ado, just do it! The reduction ratio of the motor is 1:120. With the two gearboxes just increasing the power, the speed is reduced to about 1 revolution per 1 minute.
The completed turntable looks like this:
Bill of Materials
2. TT Geared Motor (can be replaced by the back shaft one) *1
4. 7.4V Lipo 2500mAh Battery (Arduino Power Jack) *1
6. Paperboard *N
7. Black Masking Paper *1
8. Black Electrical Adhesive Tape *1
9. Ice Cream Bar *10
10. 3-Pin Rocker Switch *1
11. 1kΩ Potentiometer with Rotary Button *1
Get everything ready for the project, and then here we go!
[rub hands] Wow, the geared motor with back shaft and the wheel
Geared motor, which can be replaced by the back shaft one
Take the back shaft one and remove the gearbox
Remove the gear on the motor axis first
Prise open the gussets on both sides of the motor
This is what it looks like
Remove the copper wire of the motor and the metal winding on the shaft rod.
Set the shaft rod aside
Drill a 6.5mm hole on the white back cover of the motor
Apply quick-drying glue on the rod and insert it into the shaft of the geared motor with back shaft.
Put the white back cover on
Out the motor shell on
Put the gussets on the two sides
Remove the shell of the motor, fixed the buckle of the motor and insert them into the shaft together
Install the gear removed before
Put on the gearbox and screw it on
At this point the two motors can also rotate each other, they must be fixed. The two motors can be held by small boards made of ice cream bars
The bottom of the motor must also be padded with ice cream bars, which are later glued to the bottom plate of the turntable
Draw a circle on the cardboard. I drew a circle with a diameter of 25cm. Use a carving knife to cut the circle on the cardboard
The 7.4V Lipo-Battery
This is the charging pad with USB interface. If battery power is not needed, the battery and charging pad can be replaced by a power seat
The 1kΩ potentiometer, and a matching rotary button hat with it
The 3-pin rocker switch
Connect as the picture shows
After connecting, glued the motor and battery to the paperboard. When the motor is glued, it is necessary to pay attention to align the shaft with the center of the paperboard
Cut a 10cm wide strip paperboard.
My paperboard has 5 layers, I am going to tear apart two of them.
Cut it as the picture shows so that it can be bent.
Fix the potentiometer on the base plate
Open a hole of the size of the potentiometer's shaft at the corresponding position on the 10cm wide strip of cardboard
Glue the strip paperboard on the side
Glue the joints for reinforce
Glue the black masking paper on the side of the paper board
Fold the masking paper on the top into the box
Glue the joints for reinforcement.
Use cellulose tape to reinforce the masking paper inside the box
Open a hole for USB interface
Fix the charging pad on the baseboard
Open a hole for rocker switch
Install the rotary button hat
The indicator will light in the box when charging, and we cannot see that because it's inside the box.
Find some light-transmitting material, such as fiber optics on a toy. Cut one off when it is not looking at me. Stick it to the indicator light by thermal glue and open a small hole to guide the light to the outside of the box.
Draw a circle around the box on a new paper board. Cut out a new paper board
Find a black material that is easy to clean, here I use the black PVC film paper. Cut out a piece as big as the paperboard
Glue the black paper on the paper board
Glue the wheel at the center of the back of the paper board
Wrap the electric tape around to beautify it
Align the slot of the wheel with the shaft rod on the gearbox of the motor and insert it