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@@ -58,54 +58,43 @@ _Note: Current Raspberry Pi implementation uses the same resources as on board
All configs are stored in [config.py](./cnc/config.py) and contain hardware
properties, limitations and pin names for hardware control.
Initially, Raspberry Pi implementation should be connected to A4988, DRV8825 or any other
stepper motor drivers with DIR and STEP pin inputs.
stepper motor drivers with DIR and STEP pin inputs.
For this branch (l293d), Raspberry Pi implementation should be connected to L293D stepper motor drivers.
Default config is created for Raspberry Pi 2-3 and this wiring config:
![l293d_front](https://github.com/sinseman44/PyCNC/blob/l293d/.github/images/l293d_1.png)
![l293d_back](https://github.com/sinseman44/PyCNC/blob/l293d/.github/images/l293d_2.png)
| Circuit name | RPi pin name | RAMPSv1.4 board pin name | Note |
|-----------------|--------------|--------------------------|-----------------|
| X step | GPIO21 | A0 | |
| X dir | GPIO20 | A1 | |
| steppers enable | GPIO26 | A2, A8, D24, D30, D38 | all steppers |
| Y step | GPIO16 | A6 | |
| Y dir | GPIO19 | A7 | |
| Z dir | GPIO13 | D48 | |
| Z step | GPIO12 | D46 | |
| E1 step | GPIO6 | D36 | reserve |
| E1 dir | GPIO5 | D34 | reserve |
| E0 dir | GPIO7 | D28 | |
| E0 step | GPIO8 | D26 | |
| Z max | GPIO11 | D19 | |
| Z min | GPIO25 | D18 | |
| Y max | GPIO9 | D15 | |
| Y min | GPIO10 | D14 | |
| X max | GPIO24 | D2 | |
| X min | GPIO23 | D3 | |
| heater bed | GPIO22 | D8 | |
| heater 2 | GPIO27 | D9 | uses for fan |
| heater 1 | GPIO18 | D10 | |
| ser 1 | GPIO17 | D11 | reserve |
| ser 2 | GPIO15 | D6 | reserve |
| ser 3 | GPIO4 | D5 | reserve |
| ser 4 | GPIO14 | D4 | reserve |
| I2C SCL | GPIO3 | - | to ads111x |
| I2C SDA | GPIO2 | - | to ads111x |
| ads1115 ch0 | - | A15 | heater 2 - nc |
| ads1115 ch1 | - | A14 | bed sensor |
| ads1115 ch2 | - | A13 | extruder sensor |
| ads1115 ch3 | - | - | not connected |
Default config is created for Raspberry Pi 1.2b and PiPlot2D system and this wiring config:
So having Raspberry Pi connected this way, there is no need to configure
pin map for project. [RAMPS v1.4](http://reprap.org/wiki/RAMPS_1.4) board can
be used for this purpose. Full reference circuit diagram and photos of
assembled controller(click to enlarge):
[![circuit small](https://user-images.githubusercontent.com/8740775/28233810-40773186-6902-11e7-8496-5750babfcf44.jpg)](https://user-images.githubusercontent.com/8740775/28233650-d64060e0-6900-11e7-8605-6475384fd2f7.png)
[![sample front small](https://user-images.githubusercontent.com/8740775/28233812-407820c8-6902-11e7-8de1-35c03509c0e5.jpg)](https://user-images.githubusercontent.com/8740775/28233649-d6402800-6900-11e7-8dca-cd35c8292e0c.jpg)
[![sample back small](https://user-images.githubusercontent.com/8740775/28233879-db96ea1c-6902-11e7-9298-11150476084b.jpg)](https://user-images.githubusercontent.com/8740775/28233648-d63fa0c4-6900-11e7-8fab-2055e035a6cb.jpg)
[![sample mounted small](https://user-images.githubusercontent.com/8740775/28233811-40777e8e-6902-11e7-8899-5991860d182c.jpg)](https://user-images.githubusercontent.com/8740775/28233652-d65f82ea-6900-11e7-9e80-d8b0c9238f95.jpg)
| Circuit name | RPi pin name | Note |
|------------------|--------------|-----------------|
| X cmd A | GPIO12 | to first L293d |
| X cmd A' | GPIO16 | to first L293d |
| X cmd B | GPIO20 | to first L293d |
| X cmd B' | GPIO21 | to first L293d |
| X endstop | GPIO10 | |
| Y cmd A | GPIO24 | to 2nd L293d |
| Y cmd A' | GPIO25 | to 2nd L293d |
| Y cmd B | GPIO8 | to 2nd L293d |
| Y cmd B' | GPIO7 | to 2nd L293d |
| Y endstop | GPIO9 | |
| servo motor cmd | GPIO18 | to sg90 servo |
| display data 4 | GPIO6 | to HD44780 |
| display data 5 | GPIO13 | to HD44780 |
| display data 6 | GPIO19 | to HD44780 |
| display data 7 | GPIO26 | to HD44780 |
| display clk edge | GPIO5 | to HD44780 |
| display Reg Sel | GPIO11 | to HD44780 |
| button up | GPIO17 | |
| button ok | GPIO22 | |
| button down | GPIO27 | |
## l293d Full/Half Stepper motor driver
This is the PiPlot2D system based on a Raspberry Pi 1.2b, L293d Stepper motor drivers and
DC 5V 2 phases 4 wires stepper motor recovered from old DVD-roms.
Draw dimensions : 4cm x 5cm
![PiPlot2D](https://github.com/sinseman44/PyCNC/blob/l293d/.github/images/PiPlot2D.png)
# Usage
Just clone this repo and run `./pycnc` from repo root. It will start in