Topics created by DavidLeigh

@cosmowave said in 1.8mm Bondtech CHT nozzle print issues:

A Nozzle with closing mechanism is needed...but that's not easy to design. 🤔

Yes, that's something that I've been thinking about for quite some time. Going back to my automotive days, that's how fuel injectors work - it's called a "pintle valve". As well as large nozzles, the other use case would be active mixing hot ends where retracting filament doesn't necessarily result in relieving pressure at the nozzle tip due to the size and design of the mixing chamber.

@davidleigh Sorry for the inconvenience, it would appear that your board is faulty. For reference, there is a section in the documentation about these kinds of faults: https://docs.duet3d.com/en/User_manual/RepRapFirmware/SD_card#troubleshooting-sd-card-issues

The interface speed ... gives an indication of whether the processor is able to communicate with the SD card at all. It should be ... 22.5MB/sec on a Duet 3 Mini in standalone mode. Other numbers, eg 12MBs/sec, are odd and suggest an issue with the SD card. If the socket or processor is faulty but the card is detected, it usually drops to 0.2MB/sec.

Please send an email to warranty@duet3d.com and CC your reseller. Include a link to this forum thread and the details of your original purchase. You'll receive a reply with a form to fill out.

Ian