I recently updated Sprinter firmware to the latest version. Using Sanguinololu v1.3, ATMega644p.
The old firmware that came on the board was Sprinter but I don't know which version. It had no problems keeping the hot end temperature right on the line. Maybe 1-2 degrees of slack when extruding heavily but never more than that. It was an old version before there was acceleration/deceleration, big difference as it used to shake the whole table it was on.
After updating the firmware it runs much more smoothly but I see wide temperature swings, up to 10 degrees higher or lower than its set temp. I managed to reduce it a bit by turning on temperature smoothing with a factor of 4 (the default 16 does poorly). Ideally I would like to bring it back to its old settings where it kept the temp right on the line, since none of the hardware has changed.
Also, I tried making the thermistor type more correct (to the Honeywell one, #7) but while it compiles and uploads correctly, when connecting to it via Pronterface, it gives me a weird error and never quite connects:
Sprinter
1.
And that's it. Nothing happens. If I roll back to the old 100k basic thermistor setting, it works fine.
Any ideas to either fix the thermistor bugginess or get stability back to my temperatures? Thanks!
