A SlideShare presentation on how to make a perpetual flip calendar by Matthew Angelo B. Evangelista of Tech Z.

1. Perpetual Flip
Calendar
Z-Evangelista

2. 1.
What is a
Perpetual Calendar

3. What is a Perpetual Flip
Calendar?
✗ A calendar that can be flipped
for many years
✗ Involves numbers placed in a
box that can be rotated to adjust
for the current day
✗ Perpetual calendars have
existed since early 1500’s
3

4. 2.
How does it work?

5. 5

6. 6
How does it work?
✗ The first number (the black block) will be seen first
through the first hole
✗ The calendar will be flipped counterclockwise making
the black block go to the other side
✗ The second number (the white block) will be seen next
through the 2nd hole
✗ The process can be repeated indefinitely

7. 3.
How do you make
it?

8. Things to consider
Quality of Wood
The quality of wood
gravely affects the whole project.
Both the aesthetics and the
strength of the wood can
determine how the project will go
Measurements
The measurements
done in VCarve should be really
accurate. A few millimeters of
mistakes can make your flip
calendar unusable
Amount/Size of Wood
The size of the
wood determines the
measurements of the calendar. It
should be enough for the whole
project and if it isn’t, you need to
adjust or buy wood.
8
How to connect the
wood
There are several ways to
connect each part of the wood.
Better connections can be done
provided the correct equipment
The Calendar Numbers
The amount of
dates that you would put inside
the flip calendar should be
determined at first. The way the
numbers are placed in the block
should be considered
Kind of Calendar Stand
The Calendar
stand is optional for the project.
There are several ways to do it
depending on how you want.

9. 9
Calendar Numbers
✗ Create the block size on VCarve( 5 x 6 x 1 cm)
✗ 17 wood blocks are cut using CNC
✗ The blocks are printed with numbers (1 to 31, Next
month, and 2 Flip) by rastering through the laser cutter
✗ Sand the blocks. After sanding, varnish them.

10. 10
Calendar Numbers (VCarve)

11. 11
Calendar body
✗ Make the design for the calendar body through
VCarve (1 17 x 11 x 1.5 cm, 2 17 x 7.2 x 1.5 cm, 2 11
x 7.2 x1.5 cm). Note that 0.75 cm deep pockets would
be placed based on the design.
✗ Cut these designs using VCarve
✗ Sand to make them fit snuggly

12. 12
Calendar body (VCarve)

13. 13
Calendar body
✗ Varnish each part and connect them using glue
✗ Cut a 17 x 11 cm acrylic cover one side of the
calendar
✗ Place the acrylic cover using a self-adhesive

14. 14
Calendar body (from the acrylic side with calendar numbers)

15. 15
Perpetual Flip Calendar(from the front)

16. 16
Calendar stand
✗ Create a design on VCarve (1 15 x 17 x 1.8 cm, 1 9 x
10 x1.8 cm, 1 9x 17 x 18 cm). Note that a 9x 2 x1.8
cm block should be removed from the 15 x 17 x 1.8
cm block. 0.9 cm pockets should be placed on the two
other blocks
✗ Sand the blocks
✗ Connect the two blocks with the pockets through glue
✗ Place the connected blocks to the hole in the other
block. Sand the hole to make the block fit.

17. 17
Calendar stand (VCarve)

18. 18
Finished Calendar stand

19. 19
Perpetual Flip Calendar with Stand

20. 20
Source
✗ For project and image : Perpetual Flip Calendar,
uploaded by Measured Workshop:
https://www.youtube.com/watch?v=VJ1Hv339CgQ

21. 21
Thanks!
For more information about the
project and other possible projects
✗ Visit Measured Workshops
youtube page:
https://www.youtube.com/
channel/UCvQcbUdIMoDc8tOG
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