# How to request: Dual Extruder Offsets set in firmware **URL:** \ **Category:** Software\ **Created:** [August 24, 2016, 9:50pm UTC](https://forum.lulzbot.com/t/how-to-request-dual-extruder-offsets-set-in-firmware/3903 "2016-08-24T21:50:52Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![McStaples](https://avatars.discourse-cdn.com/v4/letter/m/0ea827/32.png) [@McStaples](https://forum.lulzbot.com/u/McStaples)\ **Post date:** [August 24, 2016, 9:50pm UTC](https://forum.lulzbot.com/t/how-to-request-dual-extruder-offsets-set-in-firmware/3903/1 "2016-08-24T21:50:52Z")
Hello, I just downloaded simplify 3D, because I am desperately trying to convince myself not to return my dual extruder for my TAZ5, which I have not yet had any success using. So, simplify 3D doesn’t seem to have a setting for the dual extruder offset like Cura does (that I have found anyway, still messing with it). Googling it shows a bunch of people saying basically that I need to set those values in firmware. I’ve never made custom firmware before, so I decided to look in [downloads.lulzbot.com](http://downloads.lulzbot.com) for an arduino source file that I can edit and recompile as a hex dump file, but there are a LOT of files in the /firmware directory and I have no idea which one is the one I’m looking for. Does anybody know either a) How to do this, b)Where I can go to find out how to do this, or c) a work-around for this? Thanks! ---
**Author:** ![kmanley57](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kmanley57](https://forum.lulzbot.com/u/kmanley57)\ **Post date:** [August 24, 2016, 9:58pm UTC](https://forum.lulzbot.com/t/how-to-request-dual-extruder-offsets-set-in-firmware/3903/2 "2016-08-24T21:58:18Z")
Gcode tab in the process settings for S3D Tool head offsets you input the offsets for the second extruder there. ---
**Author:** ![shawnkoh](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/shawnkoh/32/9450_2.png) [@shawnkoh](https://forum.lulzbot.com/u/shawnkoh)\ **Post date:** [September 27, 2016, 2:35am UTC](https://forum.lulzbot.com/t/how-to-request-dual-extruder-offsets-set-in-firmware/3903/3 "2016-09-27T02:35:24Z")
> [@McStaples](#): > > Hello, > > I just downloaded simplify 3D, because I am desperately trying to convince myself not to return my dual extruder for my TAZ5, which I have not yet had any success using. > > So, simplify 3D doesn’t seem to have a setting for the dual extruder offset like Cura does (that I have found anyway, still messing with it). Googling it shows a bunch of people saying basically that I need to set those values in firmware. I’ve never made custom firmware before, so I decided to look in [downloads.lulzbot.com](http://downloads.lulzbot.com) for an arduino source file that I can edit and recompile as a hex dump file, but there are a LOT of files in the /firmware directory and I have no idea which one is the one I’m looking for. > > Does anybody know either a) How to do this, b)Where I can go to find out how to do this, or c) a work-around for this? > > Thanks! I ran into the same problem with S3D. I tried to input the toolhead offsets in S3D and couldn’t get it to work. I googled around and found that you could use M218 in your starting script in order to set the toolhead offsets. That worked, however I ran into another problem, sometimes the M218 might be applied too late and caused the printer to miss the z probe. I contacted S3D support and this is what they told me to do > Hi Shawn, > > Thank you for contacting Simplify3D support. I’m happy to assist you with this. Can you try adjusting your start script to have the T0 command below the G28 X Y to before it instead? This will likely help with the heads losing their positioning. > > Please let me know how this works for you. Thank you again for contacting Simplify3D support. > > Regards, > > ~Simplify3D Support This is what my S3D start gcode looks like now > M218 T0 X0 Y0 ; (Shawn) > M218 T1 X-0.575 Y-50.125 ; (Shawn) > G26 ; clear probe fail condition > M140 S[bed0\_temperature] ; start heating bed > M104 S170 T0 ; start heating back extruder > M104 S170 T1 ; start heating front extruder > T0 ; select this extruder first > G28 XY ; home X and Y (swapped with T0 as per S3D Support) > G1 X-19 Y258 F1000 ; move to safe homing position > M109 S170 T0 ; soften filament for Z homing > M109 S170 T1 ; soften filament for Z homing > G28 Z ; home Z > G92 E0 ; zero extruder > G1 E-12 F100 ; retract 12mm filament > T1 ; switch extruders > G92 E0 ; zero extruder > G1 E-12 F100 ; retract 12mm filament > T0 ; switch extruders > G1 X-17 Y100 F3000 ; move above wiper pad > G1 Z1 ; push nozzle into wiper > G1 X-19 Y95 F1000 ; slow wipe > G1 X-17 Y90 F1000 ; slow wipe > G1 X-19 Y85 F1000 ; slow wipe > G1 X-17 Y90 F1000 ; slow wipe > G1 X-19 Y80 F1000 ; slow wipe > G1 X-17 Y95 F1000 ; slow wipe > G1 X-19 Y75 F2000 ; fast wipe > G1 X-17 Y85 F2000 ; fast wipe > G1 X-19 Y80 F2000 ; fast wipe > G1 X-17 Y70 F2000 ; fast wipe > G1 X-19 Y75 F2000 ; fast wipe > G1 X-17 Y95 F1000 ; slow wipe > G1 X-19 Y90 F1000 ; slow wipe > G1 X-17 Y85 F1000 ; slow wipe > G1 X-19 Y90 F1000 ; slow wipe > G1 X-17 Y80 F1000 ; slow wipe > G1 X-19 Y95 F1000 ; slow wipe > G1 X-17 Y75 F2000 ; fast wipe > G1 X-19 Y85 F2000 ; fast wipe > G1 X-17 Y80 F2000 ; fast wipe > G1 X-19 Y90 F2000 ; fast wipe > G1 X-17 Y85 F2000 ; fast wipe > G1 Z10 ; raise extruder > G1 X-9 Y-9 ; move above first probe point > M204 S100 ; set accel for probing > G29 ; probe sequence (for auto-leveling) > M204 S500 ; set accel back to normal > G1 X0 Y0 Z15 F5000 ; get out of the way > M400 ; clear buffer > M117 Heating… > M104 S[extruder0\_temperature] T0 ; start heating back extruder > M104 S[extruder1\_temperature] T1 ; start heating front extruder > M190 S[bed0\_temperature] ; stabilize bed > M109 S[extruder0\_temperature] T0 ; stabilize back extruder > M109 S[extruder1\_temperature] T1 ; stabilize front extruder > T1 ; switch to front extruder > G1 E0 F75 ; extrude filament back into nozzle > T0 ; switch to back extruder > G92 E-12 ; adjust E value > G1 Z2 E0 F75 ; extrude filament back into nozzle > M117 TAZ Printing… I hope this helps!