web Link vs slicer corrupted transmission bug

[HonzaJaros]

Hello,

yesterday I experienced very strange issue and I believe it is a bug.

my friend send a gcode, 50MB, through the link website through VPN and it was very slow. it shows percentage and when it reached 100% it was sitting there 10-15 and nothing was happening.

so he decided sent the gcode through the slicer (also through the same VPN) after 15 minutes the printer started to print.

after few minutes of first layer I heard wrong sound and found out the nozzle is digging through the smooth sheet, so I stopped it. and went for support.

they observed gcode and did not find anything strange.

so there is my only viable theory, why this happened.

the slicer somehow haven't been notified that there is already file transaction through the link web and accepted the slicer. meanwhile printing. the link finally got all the data and initiated print as well. corrupted the USB and went Z below 0.

after stoping. the Z was uncalibrated, USB was corrupted and must have been formatted.

no other evidence what happened. support didn't find anything wrong.

[TojikCZ]

I am going to transfer this to Prusa-Firmware-Buddy as this looks like a Buddy printer, not an MK2.5/S or MK3/S/+ one

[HonzaJaros]

thank you

[VH-fixer]

Since I went to FW6.0.0 I have transfered files via wifi and found a few problems. In one case the wifi load repeated a block of the G code and an area of the print was repeated at the same Z. This was a first layer and very noticeable. I deleted and reloaded the G code and everything works correctly. Other wifi issues with 6.0.0 I have seen are in other bug reports. I think the WIFI in fw 6.0.0 needs major quality work.

Update I replaced my WiFi card and tried Prusalink and PrusaSlicer based wifi file transfers again. They fail most of the time. A long wait and then fail messages. Sometimes saying the usb is full. It is 95% empty. Even if they transfer works I have learned not to trust them. Everything else about the wifi works well. Monitoring the printer and file deletion.

When I transfer to the Thumb drive from a PC directly. No problems. Files print correctly.

I am using a 16GB Thumb drive. Should this matter at all?

I have now ruled out WiFi hardware as a problem. This is a software problem in V6.0.0

[LuckyResistor]

I had similar issues, but my PrusaXL printer is connected via Ethernet.

• In one case, the printer skipped some gcode commands while printing an infix. This resulted in a strange diagonal movement, dragging filament across the part. One line of the infill was missing after this.

• On a second case, the printer repeated a section of infill, printing over the same area twice - what resulted in a huge mess with filament blobs that eventually caused the printer head crashing into a blob, what shifted print. I had to cancel it.

• Investigating the gcode from the SD card and the downloaded versions from Prusa connect didn't had these anomalies.

Is the gcode that is streamed verified with checksums in the firmware? Or is it accepted and printed unverified?

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[github-actions[bot]]

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