# Tax 5 with dual extruder v3 using one extruder

**URL:** <https://forum.lulzbot.com/t/tax-5-with-dual-extruder-v3-using-one-extruder/6643>\
**Category:** Hardware\
**Created:** [April 9, 2019, 11:21pm UTC](https://forum.lulzbot.com/t/tax-5-with-dual-extruder-v3-using-one-extruder/6643 "2019-04-09T23:21:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![FTWM](https://avatars.discourse-cdn.com/v4/letter/f/3d9bf3/32.png) [@FTWM](https://forum.lulzbot.com/u/FTWM)\
**Post date:** [April 9, 2019, 11:21pm UTC](https://forum.lulzbot.com/t/tax-5-with-dual-extruder-v3-using-one-extruder/6643/1 "2019-04-09T23:21:39Z")

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What is the best way to print something with one extruder on? The second extruder is on while I’m printing and I don’t want it on. Using Cura 3.6.3 on a windows pc

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**Author:** ![b-morgan](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.lulzbot.com/b-morgan/32/11517_2.png) [@b-morgan](https://forum.lulzbot.com/u/b-morgan)\
**Post date:** [April 10, 2019, 1:50pm UTC](https://forum.lulzbot.com/t/tax-5-with-dual-extruder-v3-using-one-extruder/6643/2 "2019-04-10T13:50:19Z")

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I’d create a dummy material with as low as possible temperatures and tell CuraLE to use that in the second extruder. There is a minimum temperature below which the Marlin firmware will not allow extrude commands. I going to guess (from the Marlin config file) that the minimum temperature is 120 but you may be able to set the standby temperature lower.

```nohighlight
#define PREVENT_COLD_EXTRUSION
#define EXTRUDE_MINTEMP 120

```

You don’t have to put any filament in the second extruder but the default start code will pretend like there’s something there anyway. It is probably possible to define a “new printer” with different start code that could eliminate some of that, but I’m guessing its not worth it.