Triffid_Hunter Wrote: ------------------------------------------------------- > Kliment's Pronterface works great, although its > home buttons will slam your axes into the ends and > grind the motors. Alter the home commands in > pronsole.py or add different buttons with > custombtn.txt. Thanks, didn't know about that - will try it tonight. Florianby floe - Firmware - experimental, borrowed, and future
Hello everyone, I'm just putting the finishing touches on my custom RepStrap (see here). It's using Gen3 electronics with the Teacup firmware from git master, and I can operate everything just fine by using minicom to type in G-Codes. I tried the original FiveD firmware at first, but that kept crashing on me after a few commands, so I switched. However, the original RepRap host software (usingby floe - Firmware - experimental, borrowed, and future
OK, to conclude this thread: I've got everything working now, all following problems are very likely going to be of a mechanical nature (slipping filament etc.). There is one extremely weird glitch left on my extruder board: when I start turning the trimpot up from the leftmost position (=GND), the Mega168 crashes. This happens with the extruder software, with a tiny test program I wrote, even wby floe - Controllers
C+/C- should be ok. Does the LED near the C terminals turn on when you enable the heater? Can you maybe enable serial debugging in the reprap host software and share the console log? Floeby floe - Controllers
nophead Wrote: ------------------------------------------------------- > Yes I believe so. It will probably need a fan though. But couldn't you just connect a Pololu driver to the D9 and D10 headers by using them as outputs? My main point is that it seems quite unnecessary to have this nice robust RS485 link from mainboard to extruder and then add two rickety wires to actually drive the steppby floe - Firmware - mainstream and related support
Thanks for your advice - after some more testing, I think that the power supply is to blame for most problems. It's current-limited to 2A (which I assumed to be enough for testing), but it seems to be prone to voltage dropouts when load spikes appear. I've added a bank of 5 x 1000 uF caps as a quick fix and I managed to successfully heat the barrel to 205 C. Yay! As for the stepper, I've replaceby floe - Controllers
Hi everybody, I have a background question: why does the mainboard use RS485 AND 2 dedicated logic signals for talking to the extruder driver? I've had some problems with my extruder driver because I've left the 2 inputs (D9 & D10) floating accidentially. But why not handle all of this via RS485 in the first place? Florianby floe - Firmware - mainstream and related support
Whatever the original reason was, after removing the chip the extruder board at least talks to the mainboard again. The short is inside the chip, so it's almost definitely fried. I've found a microscopic solder residue between the 2B terminal and GND; maybe that was the original problem. *sigh* Total casualties: one 7805 and one A3949. So I'm at least back on track to my original goal of testingby floe - Controllers
> can i replace it with the l6505 and l6202? To use one of these, you would have to redesign the PCB layout, so it's probably quite a lot of hassle. If you want to do that anyway, I'd recommend to go for the official replacement part, the A3950 (smaller package). Florianby floe - Controllers
> It could be the voltage regulator, not a lot else connected to 12V rail. Odd for it to go though. Check C1 and C2 are the correct polarity. Well, from the way it looks now, it's one of the motor control chips after all.. :-( I removed the voltage regulator, but the resistance of 3-4 Ohms between GND and 12V persisted. Some more measuring revealed that it's probably terminal 2B of motor driveby floe - Controllers
All three MOSFETs are still at around 14 Megaohm across their terminals, so they probably are OK. However, I forgot to mention that I didn't have the motor connected yet, wanted to try the heater first. Should I have connected a dummy load instead? Florian P.S. One additional observation: when I power the board from USB, the power LED glows dimly. AFAICT that shouldn't happen. Could the voltby floe - Controllers
Hello everyone, I've just tried to test my extruder and I seem to have fried something in the process. The board was working as expected, giving temperature readings via RS485. I then turned on the heater and turned up the trimpot on the extruder controller. Immediately, the overcurrent protection of my power supply (2A @ 12V) cut in, and now I have a resistance of about 3 Ohms between GND and +by floe - Controllers