Topics created by andywm

@Polyneutron21 Had a chance to troubleshoot your 6HC return today. First tests did confirm the transfer ready pin error, but then I noted that the erase jumper was left on the pins, continuously erasing the firmware. I took a close look at the photos you posted to the forum, and I can see the erase jumper was installed then, too:

ee54ba38-508a-4867-b9cd-3a1eda306160-image.png

I removed the erase jumper, flashed the firmware with Bossa, and tested the board - it works fine:

bf951c7f-9a86-4612-aa3c-e25296ec8181-image.png

@andywm 👍

@andywm said in Deliberately slowing down heater warm-up:

I'd do what @jens55 suggested - oh wait, I already have! (although I chose a DC UPS).

https://somei3deas.wordpress.com/2019/10/22/fitting-a-dc-uninterruptible-power-supply-ups-and-separate-5v-supply/

and

https://somei3deas.wordpress.com/2019/10/27/ups-battery-installation/

That is to say, run the bed from the mains and the rest of the printer from the UPS. That way, in the event of a power outage, the UPS will keep the printer running for much longer because the bed has by far the biggest current draw. And it'll take some time for the bed to cool.

I'd also fit a thermal cut-out if the bed doesn't have one (although if it was me, I wouldn't use a bed heater that is so over powered).

No problem!

@phaedrux said in A Bed Leveling Quandary:
In my case - even linear guides can be bent ☹

My heightmap looked the same as the last picture.

I first had to screw my x-axis tight in the middle, then attach it to the outside with a hair-ruler with a slight bend against the delay - the rest is done by mbc (mesh bed comp.)