My Taz 6 has always been great. Since I switched to the HS 0.8 Toolhead, updated firmware, and dialed in nice prints with ABS at 230C I figured I’d move on to printing nylon as I had done many times before with the original single extruder at 255. Well, now, for any settings over 240 or so it goes through it’s normal routine f wipe, bed level, park and wait til pheasant and bed temps get to the right values. The values get where they are supposed to, ie 255 and 100 for example, but it never moves on to print like it does for lower temps. Console just spits out the code echo:busy:processing Over and over and over and over. I get tired of watching it after 5 minutes at temp!
Any help greatly appreciated.
It has to remain stable at the target temp for a set period, and the settings for it to try and maintain temp are the PID settings.
It’s likely optimized around PLA temps, so it could help to re-run your PID autotune around 255 instead.
Issue the command:
M303 E0 C8 S255 U1
to auotune around 255, then optionally
M500
If you want to save the settings to the EEPROM (otherwise the previous PID settings will be set upon reboot).
Edit: What firmware are you running? they’ve switched to MPC instead of PID for some of the current printers, but I’m not sure if the legacy printers (like Taz 6) were included, as I run custom firmware on my Taz machines.
I’ve updated the firmware through Cura LE just a couple days ago when I put the new extruded on. I did several ABS prints with no real issues at 230C and bed at 100C. When I switched filaments to Nylon and used default nylon settings, that’s when it would never move beyond heating to final temps. But stability may well be the issue as when 255 is set (or whatever 250, 260) it just does a sign wave around the set temp, heating up to 258 then cooling to 252 or so, over and over…it never sets still. I’ll do as you said and get back her tomorrow. Thank you.
Sine wave around desired temp is a big indicator of PID not being calibrated right.
Looking through the firmware source, it looks like Taz6 is still on PID for temp control, so the commands from before should help you out.