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Revision to FAQ

Tony

=== My Z axis won't home, it crashes into the bed (or endstop) ===
 
Read [[Configuring_RepRapFirmware_for_a_Cartesian_printer#Homing_Z[[ConfiguringRepRapFirmwareCartesianPrinter#Section_Homing_Z|Read Configuring RepRapFirmware for a Cartesian printer: Homing Z]]
Read [[Configuring_RepRapFirmware_for_a_Cartesian_printer#Homing_Z[[ConfiguringRepRapFirmwareCartesianPrinter#Section_Homing_Z|Read Configuring RepRapFirmware for a Cartesian printer: Homing Z]]
 
=== I can control fans 0 and 2, but not fan 1 ===
 
Fan 1 output is configured in thermostatic mode by default and also turns on automatically when the processor is started up or reset. This is for added safety when you use it to control the hot end fan. See https://duet3d.com/wiki/Connecting_and_configuring_fans#Thermostatically_controlled_fans[[Connecting and configuring fans#Section_Thermostatically_controlled_fans|Connecting and configuring fans: Thermostatically controlled fans]]and also the following section on that page.
Fan 1 output is configured in thermostatic mode by default and also turns on automatically when the processor is started up or reset. This is for added safety when you use it to control the hot end fan. See https://duet3d.com/wiki/Connecting_and_configuring_fans#Thermostatically_controlled_fans[[Connecting and configuring fans#Section_Thermostatically_controlled_fans|Connecting and configuring fans: Thermostatically controlled fans]]and also the following section on that page.
 
=== I upgraded to firmware 1.19 and now when I try to probe the bed using G32, G29 or G30, it makes unexpected movements ===
You have configured your slicer to use absolute extrusion coordinates, then you have used a relative extrusion command in your slicer end gcode script to retract a little filament, without switching to relative extrusion mode first.
 
* We recommend you set your slicer to generate relative extruder coordinates if it can. Include the M83[[Gcode#Section_M83_Set_extruder_to_relative_mode|M83]] command in your start gcode.
* We recommend you set your slicer to generate relative extruder coordinates if it can. Include the M83[[Gcode#Section_M83_Set_extruder_to_relative_mode|M83]] command in your start gcode.
* If your slicer doesn't support generating relative extrusion coordinates, place either a M83 command or a G92 E0 command before the G1 E-xxx in your end gcode that you want to retract a little filament.
 
 
If your printer is a Cartesian, CoreXY etc. the solution is similar. For example, if the X axis sometimes fails to home all the way, look for the first G1 S1 X command in homex.g and increase the X parameter to at least the length of the axis. Do the same in homeall.g.
 
=== Some Features of Duet Web Conctrol not working ===
 
This is often caused by using an incompatible browser. Chrome and Firefox browsers full supports DuetWebControl however Edge and IE have problems. ([https://www.duet3d.com/forum/thread.php?id=405&p=2]).
 
DWC file editor works in Safari 10.0.1 and later. (Won't work in any earlier versions), from the thread linked above.
 
If this is not the case ensure you are running the l[[Firmware Overview#Section_Checking_firmware_versions|atest stable versions of the firmware]] and Duet Web Control

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