# Mainsail shows only one extruder **URL:** \ **Category:** General Discussion\ **Created:** [March 23, 2024, 1:45pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156 "2024-03-23T13:45:11Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![scharkalvin](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/scharkalvin/32/8349_2.png) [@scharkalvin](https://klipper.discourse.group/u/scharkalvin)\ **Post date:** [March 23, 2024, 1:45pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/1 "2024-03-23T13:45:11Z")
### Basic Information: Printer Model: enderwire MCU / Printerboard: MF SB2040, BTT SKR mini v3 [moonraker.log](https://klipper.discourse.group/uploads/short-url/boM2kLOE9ZEMz7xGqahaJ6pkC8V.log) (68.1 KB) [klippy (1).log](https://klipper.discourse.group/uploads/short-url/dA8CZEmg0FxEGdrRE1KN8Qh1eEi.log) (428.3 KB) ### Describe your issue: .I have two extruders, but only one hot end (dual bowden) in printer.cfg #extruder 0, and ONLY hot end [extruder] max\_extrude\_only\_distance: 100.0 step\_pin: PB3 dir\_pin: PB4 enable\_pin: !PD1 microsteps: 16 rotation\_distance: 23.5 full\_steps\_per\_rotation: 200 gear\_ratio: 80:20 nozzle\_diameter: 0.400 filament\_diameter: 1.750 heater\_pin:SB2040:gpio6 pressure\_advance: 0.074 pressure\_advance\_smooth\_time: 0.040 sensor\_type: ATC Semitec 104NT-4-R025H42G sensor\_pin:SB2040:gpio27 #control = pid #pid\_Kp: 21.527 #pid\_Ki: 1.063 #pid\_Kd: 108.982 min\_temp: 0 max\_temp: 270 [tmc2209 extruder] uart\_pin: PC11 tx\_pin: PC10 uart\_address: 3 run\_current: 0.5 interpolate: False #extruder 1, second M4, shares hot end with extruder 0 #not sure if pressure advance can be different from extruder 0, or musts be same. [extruder\_stepper extruder1] extruder: step\_pin:SB2040:gpio9 dir\_pin:SB2040:gpio10 enable\_pin:!SB2040:gpio7 microsteps: 16 rotation\_distance: 23.5 full\_steps\_per\_rotation: 200 gear\_ratio: 80:20 [tmc2209 extruder\_stepper extruder1] uart\_pin:SB2040:gpio8 #tx\_pin: PC10 //SB2040 does not assign a tx pin, so can’t read back? uart\_address: 0 run\_current: 0.5 interpolate: False Mainsail dashboard only shows one extruder (I don’t know which one), so How do I test extrusion distance? ---
**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\ **Post date:** [March 23, 2024, 1:55pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/2 "2024-03-23T13:55:22Z")
Please: If you decide to post code snippets. Format them as `Preformatted Text`, else important informations can get lost. ![Format](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/6/643ab9def96b03089cfb0c194628129fcc96b3f8.png) Also: This snippet is in the klippy.log. > [@scharkalvin](#): > > I have two extruders, but only one hot end Is it a mixing hotend? Or another system? ---
**Author:** ![scharkalvin](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/scharkalvin/32/8349_2.png) [@scharkalvin](https://klipper.discourse.group/u/scharkalvin)\ **Post date:** [March 23, 2024, 2:02pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/3 "2024-03-23T14:02:06Z")
I have a Taichi hot end. This has two bowden tubes that feed the nozzle one at a time. You must extract one filament a few CM before loading the other one. Sorta a poor man’s carrot feeder. I’m new to discord, klipper and voron, and feel like I’m drinking from a fire hose! ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [March 23, 2024, 5:48pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/4 "2024-03-23T17:48:23Z")
Checkout [X-In/1-Out Non-Mixing Extruder - Automate SuperSlicer & PrusaSlicer Filament Swaps](https://klipper.discourse.group/t/x-in-1-out-non-mixing-extruder-automate-superslicer-prusaslicer-filament-swaps/5285) ---
**Author:** ![scharkalvin](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/scharkalvin/32/8349_2.png) [@scharkalvin](https://klipper.discourse.group/u/scharkalvin)\ **Post date:** [March 24, 2024, 2:47pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/5 "2024-03-24T14:47:31Z")
Very good info for setting up slicers, but doesn’t solve my mainsail issue. I only see one extruder control section in the dashboard, no way to select between two extruders when loading, unloading, or testing extrusion. Something is missing from printer.cfg, I don’t know what. ---
**Author:** ![theophile](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/theophile/32/31_2.png) [@theophile](https://klipper.discourse.group/u/theophile)\ **Post date:** [March 25, 2024, 7:37pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/6 "2024-03-25T19:37:20Z")
Klipper doesn’t natively support gcode commands `T0` and `T1`, but if you create macros with those names Mainsail will have the corresponding buttons available. ---
**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\ **Post date:** [March 25, 2024, 7:42pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/7 "2024-03-25T19:42:44Z")
> [@theophile](#): > > Klipper doesn’t natively support gcode commands `T0` and `T1` …and a little search here would indeed reveal pretty useful content like [X-In/1-Out Non-Mixing Extruder Config](https://klipper.discourse.group/t/x-in-1-out-non-mixing-extruder-config/2387) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\ **Post date:** [May 24, 2024, 7:42pm UTC](https://klipper.discourse.group/t/mainsail-shows-only-one-extruder/15156/8 "2024-05-24T19:42:58Z")
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