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| -rw-r--r-- | docs/FAQ.md | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/docs/FAQ.md b/docs/FAQ.md index 42485101..daabd483 100644 --- a/docs/FAQ.md +++ b/docs/FAQ.md @@ -10,7 +10,8 @@ Frequently asked questions 7. [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) 8. [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) 9. [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) -10. [How do I upgrade to the latest software?](#how-do-i-upgrade-to-the-latest-software) +10. [Will the heaters be left on if the Raspberry Pi crashes?](#will-the-heaters-be-left-on-if-the-raspberry-pi-crashes) +11. [How do I upgrade to the latest software?](#how-do-i-upgrade-to-the-latest-software) ### How do I calculate the step_distance parameter in the printer config file? @@ -199,6 +200,17 @@ bootloader is a one time step that typically requires an external programmer - search the web to find the instructions for your particular device. +### Will the heaters be left on if the Raspberry Pi crashes? + +The software has been designed to prevent that. Once the host enables +a heater, the host software needs to confirm that enablement every 5 +seconds. If the micro-controller does not receive a confirmation every +5 seconds it goes into a "shutdown" state which is designed to turn +off all heaters and stepper motors. + +See the "config_digital_out" command in the +[MCU commands](MCU_Commands.md) document for further details. + ### How do I upgrade to the latest software? The general way to upgrade is to ssh into the Raspberry Pi and run: |