This is a remix of plotclock([https://www.thingiverse.com/thing:248009](https://www.thingiverse.com/thing:248009)).

Parts other than prints

• ATOM Lite (1 pce.)
• universal PCB
• pin header
• MG90S servo (3 pcs.)
• magnetic drawing board 106x76mm (1 pce.)

(I used : [https://ja.aliexpress.com/item/1005002280761444.html](https://ja.aliexpress.com/item/1005002280761444.html))

• M2.1x10mm flat head tapping screws (11 pcs.)
• M3x10mm tapping screws (8 pcs.)
• M2.5x6mm screws (3 pcs.)
• M3x10mm screws (4 pcs.)
• M3x30mm screws (2 pcs.)
• M3 washers (4 pcs.)
• M3 nats (10 pcs.)

How to operate

Start Arduino and display the serial monitor.

For the first time, start the Arduino in Calibration mode.

When performing calibration, remove arm_r (MG90S) and arm_l (MG90S).

Enter l to adjust the left servo.

Place calibration_plate on the left servo.

The position offset 20deg from directly above to the left is 0deg, and 1 memory is 10deg.

Set 0deg to 500 and attach the servo horn so that it points near 0deg.

Then attach the calibration(MG90S) to the servo horn.

Select an angle with a,d and enter a number or enter q,w,e,z,x,c to Adjust the servo to point at the correct angle.

It does not matter if 0,10,170,180deg do not match properly.

When done, return to the calibration menu with b.

Enter r to adjust the right servo.

Place calibration_plate on the right servo.

The position offset 20deg to the right from directly above is 0deg, and 1 memory is 10deg.

Set 0deg to 2400 and attach the servo horn so that it points near 0deg.

The rest is the same as the servo on the left side.

t is the position adjustment after writing.

If you hear a sound from the stopped servo, try changing the position a little.

Attach the pen and arm.

Enter u to adjust the lift.

Use u, d, and s to select the position where the pen is raised, the pen is lowered, and the position for the erase operation.

Change the value by entering a number or by entering q, w, e, z, x, c.

When finished, return to the calibration menu with b.

Enter p to write a 10 mm grid.

Adjust the servos on the left side and right side so that they appear in the middle.

For example, if you decrease all the servos on the left side by 10 and increase all the servos on the right side by 10 the grid will move up a little.

Enter n to configure the network settings.

Set the SSID, password, host name, NTP server name, and time zone.

Finally, enter s to save your settings.

Enter b to start the clock.

history

• February 12, 2023

first release

Category: Hobby