# Can't use copy mode M605 S2 via back USB port **URL:** \ **Category:** J1/J1s IDEX\ **Tags:** Gcode\ **Created:** [June 2, 2023, 7:07pm UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630 "2023-06-02T19:07:19Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![TylonHh](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/tylonhh/32/22391_2.png) [@TylonHh](https://forum.snapmaker.com/u/TylonHh)\ **Post date:** [June 2, 2023, 7:07pm UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/1 "2023-06-02T19:07:19Z")
Hey there, I connected my J1 via a Raspberry on the back USB print to print via OctoPrint. It works pretty well so far, except I can’t print in copy mode. These are the very first uncommented lines of gcode: ```auto M107 ;TYPE:Custom T0 M82 ;absolute extrusion mode ;Start GCode begin ;M605 S0 ;Full control mode ;M605 S1 ;Auto-park mode M605 S2 X150 R0 ;M605 S3 ;Mirror M140 S45 ;Start Warming Bed ``` My slicer is prusa, but I don’t see any difference to the first lines of Luban Slicer. I wonder because the mirror mode works fine. What I’m missing? Regards ---
**Author:** ![TylonHh](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/tylonhh/32/22391_2.png) [@TylonHh](https://forum.snapmaker.com/u/TylonHh)\ **Post date:** [June 9, 2023, 1:49pm UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/2 "2023-06-09T13:49:40Z")
_push_ So I sliced a model in Luban an selected “Copy Mode”. When I print the file via backside USB connection only the left extruder print the object. But both hotends are heated. But when I put the same file on a USB stick an just hit the touchscreen and select the file, the copy mode is already enabled (as expected) and it also print in copy modus. So why cant I print via USB connection (without USB stick, or touchscreen) the copy mode? The mirror mode works fine via USB connection also. ---
**Author:** ![naPS](https://avatars.discourse-cdn.com/v4/letter/n/76d3ee/32.png) [@naPS](https://forum.snapmaker.com/u/naPS)\ **Post date:** [June 30, 2023, 12:15am UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/3 "2023-06-30T00:15:54Z")
I suspect this is probably related to the issue’s I’m having with OctoPrint and any multi-extruder print. Single extruder stuff typically goes through just fine. ---
**Author:** ![Viktor](https://avatars.discourse-cdn.com/v4/letter/v/d6d6ee/32.png) [@Viktor](https://forum.snapmaker.com/u/Viktor)\ **Post date:** [March 17, 2024, 1:47am UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/4 "2024-03-17T01:47:38Z")
Here are my actual findings: 1. M605 S2 command works via USB with FW v2.3.5, the oldest available FW. Any next FW (started v2.4.8 on screen/ v2.1.28 via USB) does not work correctly with M605 S2 command. (Update: The older FWs are no more available for download but I can share it.) 2. Any other modes (S0, S3 tested) seems to be OK. 3. OSS versions of FW started as v 2.2.11 doesn’t work as well. Can local staff check which change (v2.3.5/v2.4.8) can be the key issue here? Note: Similar issue has Marlin itself (but with S2 and S3 modes of M605 command). One possibility is that this issue is “imported” from Marlin. ---
**Author:** ![nailgilaziev](https://avatars.discourse-cdn.com/v4/letter/n/3da27b/32.png) [@nailgilaziev](https://forum.snapmaker.com/u/nailgilaziev)\ **Post date:** [March 23, 2024, 8:52am UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/5 "2024-03-23T08:52:01Z")
Did you contacted with snapmaker support team? did you created ticket and get response from them? ---
**Author:** ![Viktor](https://avatars.discourse-cdn.com/v4/letter/v/d6d6ee/32.png) [@Viktor](https://forum.snapmaker.com/u/Viktor)\ **Post date:** [March 24, 2024, 7:35am UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/6 "2024-03-24T07:35:53Z")
Yes, I did but no response. Sad is here is no real response to much older tickets. ---
**Author:** ![Viktor](https://avatars.discourse-cdn.com/v4/letter/v/d6d6ee/32.png) [@Viktor](https://forum.snapmaker.com/u/Viktor)\ **Post date:** [March 25, 2024, 12:14am UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/7 "2024-03-25T00:14:12Z")
Bug update: The bug is caused by commit [c6c56a2](https://github.com/Snapmaker/SnapmakerController-IDEX/commit/c6c56a2e92de3acca656f84718bee996f88696f1): Pref: right extruder do not wait temper in the middle of bed when work in copy mode. Since this commit, copy mode is not working via USB, commits works as expected. ---
**Author:** ![MarkA121](https://avatars.discourse-cdn.com/v4/letter/m/e9bcb4/32.png) [@MarkA121](https://forum.snapmaker.com/u/MarkA121)\ **Post date:** [May 23, 2024, 4:58pm UTC](https://forum.snapmaker.com/t/cant-use-copy-mode-m605-s2-via-back-usb-port/31630/8 "2024-05-23T16:58:50Z")
I just got my J1s, and found problems using Octoprint through the back USB port for IDEX printing. I have not tried copy or mirror mode, but had to be very careful about placing M605 S0 and M605 S1 commands to get the two print heads to work correctly.