A20T Wont print on the second extruder

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Percy
Posts: 33
Joined: Tue Dec 27, 2016 5:33 am

A20T Wont print on the second extruder

Post by Percy » Thu Feb 25, 2021 5:39 am

Hi I hope someone can help. I have had my a20T fore about a month and yes it prints very well. But to day I wanted to print something in silver/Grey. !n no 1 extruder I have dark Brown in Extruder 2 I have Silver / Grey and in 3rd extruder I have light brown. Any way that's just info. If I go to mixer. Then Toggle Mix I can go from 1 to 3 extruder but I cant get it to go to No2 Extruder! Can someone tell me what is wrong? I can print in three colour mix 33 33 34 But there is no way of choosing just No 2 Extruder????? Thanks in advance

chris723
Posts: 2
Joined: Wed Mar 10, 2021 10:49 am

Re: A20T Wont print on the second extruder

Post by chris723 » Wed Mar 10, 2021 11:41 am

I have the exact same issue with A10T.

Does anyone have the fix for this? :(

Percy
Posts: 33
Joined: Tue Dec 27, 2016 5:33 am

Re: A20T Wont print on the second extruder

Post by Percy » Mon Mar 22, 2021 11:21 pm

Hi you said you had the same problem as me? Have you had a answer? I cant get anything from Geeetech I think they are hopeless! Regards Percy Armstrong

rafaslot13
Posts: 1
Joined: Thu Apr 22, 2021 4:57 pm

Re: A20T Wont imprimir en el segundo extrusor

Post by rafaslot13 » Thu Apr 22, 2021 5:03 pm

buenos dias
yo tambien tengo el mismo problema y no se que hacer

SnackThat
Posts: 1
Joined: Tue Jun 01, 2021 6:47 pm

Re: A20T Wont print on the second extruder

Post by SnackThat » Fri Jun 11, 2021 6:22 am

I think its because of the old firmware, which seemed to only support 2 extruder.
I tried to upgrade to Marlin 2.0.8.2 but failed miserably.
I opened an issue for that, and if i get any luck/ answers, ill post it.

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vert
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Re: A20T Wont print on the second extruder

Post by vert » Sat Jun 12, 2021 2:21 am

running the latest marlin 2.0 bugfix on my A20T no issues at all and i'm the one that added support for it to marlin.

Axxezzor
Posts: 2
Joined: Mon Aug 23, 2021 6:45 am

Re: A20T Wont print on the second extruder

Post by Axxezzor » Mon Aug 23, 2021 7:20 am

I had the same problem with Marlin 2.0.9. Only the E0 stepper would work. 2.0.8 all the mixing steppers would work but I would get too many temperature errors.

I finally decided to take the most recent version of the firmware Geeetech released v2.3 which is based on marlin 1.1.8 and fix a few things that had to do with the 3 mixing steppers.

I fixed the mixing toggle so that you can toggle between all three mixing steppers.

I added a new Mix2 menu item.

The orginal Mix submenu allows you to set the E0 mixing stepper %, then it automatically splits the % balance evenly between E1 and E2. This is where Mix 2 comes in, if the E0 % is set to 99 or less a new Mix2 submenu will show up. Selecting the "Mix 2" submenu will lock the E0 % to what you set via the orginal Mix submenu. This leaves the remaining % balance available for E1, just adjust it to your desired % and the remaining balance, if any, will be applied to E2. It is not the most elegant solution but it works... Hopfully Vert gets Marlin 2.x.x polished up for the A20T.
If you want to give my tweak a try it is on thingiverse...

https://www.thingiverse.com/thing:4904575

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