This stamp can print dates, hours, prices and serial numbers on 8 digits.
Numbers and symbols are mounted on kinds of wheels that can be turned and are positioned by little balls to be aligned together.
Feel free to try changing symbols, numbers of wheels, etc... Thank you for sending feedback at firstname.lastname@example.org
Step 1: Bill of Material
Required materials :
- 5mm thick transparent Acrylic approx. 570mm x 70mm
- 3mm thick transparent Acrylic approx. 130mm x 65mm
- 2mm thick transparent Acrylic approx. 130mm x 65mm
- 0.5mm thick polypropylene approx. 32mm x 65mm
- 1 Rubber sheet (Special for laser engraving) approx. 39mm x 78mm
- 8 bearing's balls 3mm diameter
- 1 bubberband (approx 2,5mm large, 1,2mm thick, diam without tension 30mm)
- 3 FHC M4x 50mm screws
- Some double-sided tape
- A laser cutter
- An electric screwdriver (that can turn clockwise AND counter clockwise for threading)
- 3 set of M4 taps (to make threads in the acrylic)
- A tapered drill
- A knife
- The wrench corresponding to M4 screws
- Eventually tweezers to manipulate easily 3mm balls.
Step 6: Prepare Rubber and Engrave It
Apply a piece of double-sided tape at the back of the rubber.
Engrave numbers and symbols on the other side.
After removing dust, you will have every numbers and symbols you need, each one will have a double-sided tape behind, ready to stick it to the stamp !
Step 7: Now You Must Have Every Part Ready to Be Assemble
Step 8: Start Wit the 5mm ACRYLIC PART THAT HAS 3 LARGE HOLES
Use the tapered drill to create cone shape for the screw heads.
BE SURE YOU DO IT ON THE 5mm ACRYLIC PART THAT HAS 3 LARGE HOLES
The other part that has 3 small holes is supposed to be threaded.
Then insert screws and one of the two polypropylene parts (the little rectangle must be oriented as shown on pictures, close to "Pacman mouth") ;-)
Step 9: Then Assemble the 3mm and 2mm Parts As Shown.
Don't forget to place the balls in during the assembly. It's not supposed to go through the 3mm parts, so you must insert it from the side before placing another 2mm part. Once a 3mm part has 2 2mm parts at both side, the ball can't be removed. Only the first and last ball can be removed and replaced.
Step 10: Cut the Excess of Rubber Band at Both Side
Step 11: Mount the Assembled Parts Un the Screws, Then Insert the Wheels One by One.
After the last wheel, you must place the second Polypropylene part.
Step 12: Thread the Other 5mm Acrylic Part (the One With 3 Small Holes)
Then assemble the las part.
Step 13: Place Numbers and Symbols
remove each protection on the double-sided tape and stick the numbers and symbols to the wheels.
Step 14: Stamp !
Thank you for following this instructable !