A simple arduino based leather strip cutting machine. The menu system uses the amazing Magic Designs' MD_Menu library for 2 line displays. The library puts as much as possible in FLASH reducing RAM consumption. Settings are stored in EEPROM.
- Nano CNC Shield v4
- Arduino Nano
- 2 x 8825 Stepstick Driver
- 1 x microswitch for homing the cutter
- 1 x momentary pushbutton as emergency stop
- i2c 16x2 LCD Display
- Rotary encoder with button select
- 12VDC 2A power supply
- 2 x Bipolar stepper motors
- MD_Menu (https://github.com/MajicDesigns/MD_Menu)
- MD_REncoder (https://github.com/MajicDesigns/MD_REncoder)
- LiquidCrystal_I2C (https://github.com/johnrickman/LiquidCrystal_I2C)
- SpeedyStepper (https://github.com/Stan-Reifel/SpeedyStepper)
- EEPROM (Included in Arduino IDE)
- The Y axis is used to pull the leather and the Z axis for cutting
- Note that the pinout of my Nano CNC Shield v4 was different from documentation found online. The step and direction pins were reversed.
- The rotary encoder module is connected to pins A0, A1 with A2 being the select button (see Nav.cpp)
- The i2c LCD display is on address 0x27 (see Disp.cpp)
| Function | Pin |
|---|---|
| Enable | 8 |
| X Direction | 2 |
| Y Direction | 3 |
| Z Direction | 4 |
| X Step | 5 |
| Y Step | 6 |
| Z Step | 7 |
| Home | 11 (Z-) |
| Stop | 12 |
| EncA | A0 (Abort) |
| EncB | A1 (Hold) |
| Select | A2 (Resume) |
- Rotate changes the menu options
- Single click selects
- Long click returns to previous menu After 5 seconds the menu returns to the main menu.
Max speed of both steppers
Acceleration of both steppers in steps per second2
Target of length of strip in mm
Quantity of strips to cut
The quantity of steps required to extrude 1 mm
The quantity of steps to retract after cutting (prevents sticking)
The length of the cut stroke in steps
Save settings to EEPROM
Start cutting using the current settings
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