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docs: Add a FAQ item for "multiple instances of klipper on the same machine" 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Kevin O'Connor 2019-01-07 13:59:18 -05:00
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1 changed files with 29 additions and 11 deletions
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@ -8,17 +8,18 @@ Frequently asked questions
5. [The "make flash" command doesn't work](#the-make-flash-command-doesnt-work)
6. [How do I change the serial baud rate?](#how-do-i-change-the-serial-baud-rate)
7. [Can I run Klipper on something other than a Raspberry Pi 3?](#can-i-run-klipper-on-something-other-than-a-raspberry-pi-3)
8. [Why can't I move the stepper before homing the printer?](#why-cant-i-move-the-stepper-before-homing-the-printer)
9. [Why is the Z position_endstop set to 0.5 in the default configs?](#why-is-the-z-position_endstop-set-to-05-in-the-default-configs)
10. [I converted my config from Marlin and the X/Y axes work fine, but I just get a screeching noise when homing the Z axis](#i-converted-my-config-from-marlin-and-the-xy-axes-work-fine-but-i-just-get-a-screeching-noise-when-homing-the-z-axis)
11. [My TMC motor driver turns off in the middle of a print](#my-tmc-motor-driver-turns-off-in-the-middle-of-a-print)
12. [I keep getting random "Lost communication with MCU" errors](#i-keep-getting-random-lost-communication-with-mcu-errors)
13. [My Raspberry Pi keeps rebooting during prints](#my-raspberry-pi-keeps-rebooting-during-prints)
14. [When I set "restart_method=command" my AVR device just hangs on a restart](#when-i-set-restart_methodcommand-my-avr-device-just-hangs-on-a-restart)
15. [Will the heaters be left on if the Raspberry Pi crashes?](#will-the-heaters-be-left-on-if-the-raspberry-pi-crashes)
16. [How do I convert a Marlin pin number to a Klipper pin name?](#how-do-i-convert-a-marlin-pin-number-to-a-klipper-pin-name)
17. [How do I cancel an M109/M190 "wait for temperature" request?](#how-do-i-cancel-an-m109m190-wait-for-temperature-request)
18. [How do I upgrade to the latest software?](#how-do-i-upgrade-to-the-latest-software)
8. [Can I run multiple instances of Klipper on the same host machine?](#can-i-run-multiple-instances-of-klipper-on-the-same-host-machine)
9. [Why can't I move the stepper before homing the printer?](#why-cant-i-move-the-stepper-before-homing-the-printer)
10. [Why is the Z position_endstop set to 0.5 in the default configs?](#why-is-the-z-position_endstop-set-to-05-in-the-default-configs)
11. [I converted my config from Marlin and the X/Y axes work fine, but I just get a screeching noise when homing the Z axis](#i-converted-my-config-from-marlin-and-the-xy-axes-work-fine-but-i-just-get-a-screeching-noise-when-homing-the-z-axis)
12. [My TMC motor driver turns off in the middle of a print](#my-tmc-motor-driver-turns-off-in-the-middle-of-a-print)
13. [I keep getting random "Lost communication with MCU" errors](#i-keep-getting-random-lost-communication-with-mcu-errors)
14. [My Raspberry Pi keeps rebooting during prints](#my-raspberry-pi-keeps-rebooting-during-prints)
15. [When I set "restart_method=command" my AVR device just hangs on a restart](#when-i-set-restart_methodcommand-my-avr-device-just-hangs-on-a-restart)
16. [Will the heaters be left on if the Raspberry Pi crashes?](#will-the-heaters-be-left-on-if-the-raspberry-pi-crashes)
17. [How do I convert a Marlin pin number to a Klipper pin name?](#how-do-i-convert-a-marlin-pin-number-to-a-klipper-pin-name)
18. [How do I cancel an M109/M190 "wait for temperature" request?](#how-do-i-cancel-an-m109m190-wait-for-temperature-request)
19. [How do I upgrade to the latest software?](#how-do-i-upgrade-to-the-latest-software)
### How can I donate to the project?
@ -148,6 +149,23 @@ for that particular machine. See the
[install-octopi.sh](../scripts/install-octopi.sh) script for further
information on the necessary Linux admin steps.
### Can I run multiple instances of Klipper on the same host machine?
It is possible to run multiple instances of the Klipper host software,
but doing so requires Linux admin knowledge. The Klipper installation
scripts ultimately cause the following Unix command to be run:
```
~/klippy-env/bin/python ~/klipper/klippy/klippy.py ~/printer.cfg -l /tmp/klippy.log
```
One can run multiple instances of the above command as long as each
instance has its own printer config file and its own log file.
If you choose to do this, you will need to implement the necessary
start, stop, and installation scripts (if any). The
[install-octopi.sh](../scripts/install-octopi.sh) script and the
[klipper-start.sh](../scripts/klipper-start.sh) script may be useful
as examples.
### Why can't I move the stepper before homing the printer?
The code does this to reduce the chance of accidentally commanding the