# Latest marlin firmware for TAZ 5

**URL:** <https://forum.lulzbot.com/t/latest-marlin-firmware-for-taz-5/1743>\
**Category:** Software\
**Created:** [May 11, 2015, 3:34pm UTC](https://forum.lulzbot.com/t/latest-marlin-firmware-for-taz-5/1743 "2015-05-11T15:34:29Z")\
**Posts on this page:** 1\
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**Author:** ![vitormhenrique](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/vitormhenrique/32/9222_2.png) [@vitormhenrique](https://forum.lulzbot.com/u/vitormhenrique)\
**Post date:** [May 11, 2015, 3:34pm UTC](https://forum.lulzbot.com/t/latest-marlin-firmware-for-taz-5/1743/1 "2015-05-11T15:34:29Z")

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So I started porting the g28 and g29 commands from the development branch to the firmware that Lulzbot uses, but gave up on the first 3 hours… the default firmware is too old, I think it is based on 2013 code, porting only that portion would be an considerable effort.

So I went for option two, ported the lulzbot changes to the latest marlin firmware, it is not 100% yet… I still need to redo the sound part, the current marlin sound (when using the lcd) is **annoying**. I will remove the delay on the lcd screen that lulzbot added because it does not work well on the new firmware.

Things that I tested and it is working:

- -\>Fans (both the controller and the cooling)  
-\>Extrusion / Retraction  
-\>X,Y and Z movements  
-\>Bed leveling with the grid map  
-\>And it is obviously printing 🙂

I did not test the eeprom storage of settings yet. I also had one problem where even setting the temperature using pronterface, the printer stopped after the g29 command waiting the temperature reach the correct temperature, I did not had the temperature set on cura, I’m still investigating what is happening there… I’ll try PID Tuning the extruder with the new firmware.

**Note: This is not an official firmware that lulzbot supports, upgrade it at your own risk.**

I forked the official marlin and I’m planing to keep the code up to date whenever a new feature is introduced on marlin.

The link of the forked branch is: [https://github.com/vitormhenrique/Marlin](https://github.com/vitormhenrique/Marlin)

Use this lulzbot guide to upgrade your printer: [https://ohai-kit.alephobjects.com/project/firmware-flashing/](https://ohai-kit.alephobjects.com/project/firmware-flashing/)

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