# SV04 firmware 1.1.0 buggy: Right print head stops printing 2 seconds too early

**URL:** <https://forum.sovol3d.com/t/sv04-firmware-1-1-0-buggy-right-print-head-stops-printing-2-seconds-too-early/3207>\
**Category:** Sovol SV04 IDEX\
**Created:** [August 3, 2023, 6:27pm UTC](https://forum.sovol3d.com/t/sv04-firmware-1-1-0-buggy-right-print-head-stops-printing-2-seconds-too-early/3207 "2023-08-03T18:27:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![funda](https://avatars.discourse-cdn.com/v4/letter/f/c89c15/32.png) [@funda](https://forum.sovol3d.com/u/funda)\
**Post date:** [August 3, 2023, 6:27pm UTC](https://forum.sovol3d.com/t/sv04-firmware-1-1-0-buggy-right-print-head-stops-printing-2-seconds-too-early/3207/1 "2023-08-03T18:27:14Z")

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Hello. In mirror and copy mode, the right print head stops moving for the last 1-2 seconds. It stops and does not go to the “X=0” position (mirrored). The left print head continues to work, ends the job correctly and moves to “X=0”. The right extruder also stops working for the last 1-2 seconds. For every print job. Hasn’t anyone noticed that yet?

 ![grafik](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/a/ab09b171e94839a218107bb4cfc65f03bfb29b1c.jpeg)  
On the photo you can see that the extruder is no longer working either: A thread because there was no retraction. When do you fix the bug? I’ve had this problem for a year now. The latest firmware is from early 2022.

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**Author:** ![Bjoern](https://avatars.discourse-cdn.com/v4/letter/b/46a35a/32.png) [@Bjoern](https://forum.sovol3d.com/u/Bjoern)\
**Post date:** [January 15, 2024, 9:13pm UTC](https://forum.sovol3d.com/t/sv04-firmware-1-1-0-buggy-right-print-head-stops-printing-2-seconds-too-early/3207/2 "2024-01-15T21:13:59Z")

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Hi funda,  
it took quite a while… This firmware bug occurs when the end of the G-code file on the SD card is reached. All remaining instructions in the queue get processed in dual mode with the left extruder. The bug applies to all modes except single mode. I fixed this bug in my current firmware version that [is available here](https://github.com/Bjoern70/SV04-IDEX-3D-Printer-Mainboard-Source-code/releases/tag/v1.14).