Well, I finally got a chance to check out the IRC channel, and got a few tips:1. Don't trust an IR thermometer on a hot end. Given the "spread" of most IR thermos, and the extreme heat gradient in the average hot end, I can sort of see why.
2. If you can push the filament through the hot end by hand, your temp is in the ballpark
3. There's an 8x multiplier that needs to be applied to the Vref value (which is not noted in the instructions anywhere, hah), so that the 0.05V I calculated becomes... 0.4V. Which is exactly what the Hux instructions say to use for the Melzi electronics, but tells you to use something different for the Sanguinololu, without telling you what it is. Nerf bat squad, NERF BAT SQUAAAAAAAAAAAAD.....
3a. So my "stuttering" extruder motor is most likely due to #3, rather than a bad hot end temperature.
So, after finishing my 14hr work-Saturday and hitting a co-worker's Memorial Day Party 'til 3AM, I now have the rest of the holiday weekend to keep kitbashing this thing into submission. Hopefully my Z-axis issue is also related to #3. That just leaves the heated bed issue; I still cannot find a schematic for that thing.
2. If you can push the filament through the hot end by hand, your temp is in the ballpark
3. There's an 8x multiplier that needs to be applied to the Vref value (which is not noted in the instructions anywhere, hah), so that the 0.05V I calculated becomes... 0.4V. Which is exactly what the Hux instructions say to use for the Melzi electronics, but tells you to use something different for the Sanguinololu, without telling you what it is. Nerf bat squad, NERF BAT SQUAAAAAAAAAAAAD.....
3a. So my "stuttering" extruder motor is most likely due to #3, rather than a bad hot end temperature.
So, after finishing my 14hr work-Saturday and hitting a co-worker's Memorial Day Party 'til 3AM, I now have the rest of the holiday weekend to keep kitbashing this thing into submission. Hopefully my Z-axis issue is also related to #3. That just leaves the heated bed issue; I still cannot find a schematic for that thing.