119 lines
3.5 KiB
Markdown
119 lines
3.5 KiB
Markdown
Klipper is currently in an experimental state. These instructions
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assume the software will run on a Raspberry Pi computer in conjunction
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with OctoPrint. Klipper supports only Atmel ATmega based
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micro-controllers at this time.
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It is recommended that a Raspberry Pi 2 or Raspberry Pi 3 computer be
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used as the host. The software will run on a first generation
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Raspberry Pi, but the combined load of OctoPrint, Klipper, and a web
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cam (if applicable) can overwhelm its CPU leading to print stalls.
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Prepping an OS image
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====================
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Start by installing [OctoPi](https://github.com/guysoft/OctoPi) on the
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Raspberry Pi computer. Use version 0.13.0 or later - see the
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[octopi releases](https://github.com/guysoft/OctoPi/releases) for
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release information. One should verify that OctoPi boots, that the
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OctoPrint web server works, and that one can ssh to the octopi server
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(ssh pi@octopi -- password is "raspberry") before continuing.
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After installing OctoPi, ssh into the target machine and run the
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following commands:
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```
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sudo apt-get update
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sudo apt-get install avrdude gcc-avr binutils-avr avr-libc libncurses-dev
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```
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The host software (Klippy) requires a one-time setup - run as the
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regular "pi" user:
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```
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virtualenv ~/klippy-env
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~/klippy-env/bin/pip install cffi==1.6.0 pyserial==2.7
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```
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Building Klipper
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================
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To obtain Klipper, run the following command on the target machine:
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```
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git clone https://github.com/KevinOConnor/klipper
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cd klipper/
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```
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To compile the micro-controller code, start by configuring it:
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```
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make menuconfig
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```
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Select the appropriate micro-controller and serial baud rate. Once
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configured, run:
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```
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make
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```
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Ignore any warnings you may see about "misspelled signal handler" (it
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is due to a bug fixed in gcc v4.8.3).
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Installing Klipper on a micro-controller
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----------------------------------------
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The avrdude package can be used to install the micro-controller code
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on an AVR ATmega chip. The exact syntax of the avrdude command is
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different for each micro-controller. The following is an example
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command for atmega2560 chips:
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```
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example-only$ avrdude -C/etc/avrdude.conf -v -patmega2560 -cwiring -P/dev/ttyACM0 -b115200 -D -Uflash:w:/home/pi/klipper/out/klipper.elf.hex:i
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```
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Setting up the printer configuration
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====================================
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It is necessary to configure the printer. This is done by modifying a
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configuration file that resides on the host. Start by copying an
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example configuration and editing it. For example:
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```
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cp ~/klipper/config/example.cfg ~/printer.cfg
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nano printer.cfg
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```
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Make sure to look at and update each setting that is appropriate for
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the hardware.
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Configuring OctoPrint to use Klippy
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===================================
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The OctoPrint web server needs to be configured to communicate with
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the Klippy host software. Using a web-browser, login to the OctoPrint
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web page, and navigate to the Settings tab. Then configure the
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following items:
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Under "Serial Connection" in "Additional serial ports" add
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"/tmp/printer". Then click "Save".
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Enter the Settings tab again and under "Serial Connection" change the
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"Serial Port" setting to "/tmp/printer".
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Under the "Features" tab, unselect "Enable SD support". Then click
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"Save".
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Running the host software
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=========================
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The host software is executed by running the following as the regular
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"pi" user:
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```
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~/klippy-env/bin/python ~/klipper/klippy/klippy.py ~/printer.cfg -l /tmp/klippy.log < /dev/null > /tmp/klippy-errors.log 2>&1 &
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```
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Once Klippy is running, use a web-browser and navigate to the
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OctoPrint web site. Click on "Connect" under the "Connection" tab.
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