Repetier-Host detects if an STL object is not valid because it is partially (or entirely) outside the printbed. Cura, however, also detects if the skirt/raft/brim around the object is outside the bed. Could you add this? I haven't found any other bugs (not that that was much of one), but... - I don't have an SD card reader on my printer (unfortunately), but the "SD Card" tab's still on the sidebby coelestinian - Repetier
Great! That's impressive. Who was the TB6560 seller? Gibbedy Wrote: ------------------------------------------------------- > How long did it take you to track that down? It's fairly obvious when homing every layer almost fixes the problem.by coelestinian - Reprappers
SOLVED! I still have no idea what the problem really was. However, thanks to Appdev007's hint, I surmised it related to the Arduino's power supply. Therefore, I removed D1 (which allows the Arduino to be powered from the RAMPS, and everything now works (of course, I'll need to figure out something if I ever want to print computerless, but that's another day). Thanks!by coelestinian - Reprappers
I have tried another USB cable, computer, and baudrate.by coelestinian - Reprappers
Now that you mention it, the Arduino is definitely warm, and right after cutting power with it unresponsive is hot near the USB port (and the voltage regulator?).by coelestinian - Reprappers
Just so you know, I bought some of those TB6560 drivers from eBay a while back (for 12V, though, I think). They're amazing - very quiet, up to 3A, ...- except they miss steps. To put it differently, due to an inferior, slower optocoupler on the direction pin, whenever a motor changes spin direction at high speeds, the driver will continue in the same direction a few extra steps before recogniziby coelestinian - Reprappers
Hello, all: I am using a RAMPS 1.4 board running Marlin (w/ Repetier-Host) on a custom Mendel90-type printer. Everything has worked very well for months, but this past week I have started getting strange communication issues. At first, the printer would stop in the middle of even a small print. Now, with 12v power on, it's functional maybe 10-15 seconds before I get no response. Summary: RAMPSby coelestinian - Reprappers
That sounds reasonable, and may account for part of the problem. However, this hole is square, not round. I might try out some different gcode generators instead... does Cura do the same (only small round holes should really be affected)?by coelestinian - Slic3r
I am trying to get accurately sized prints, including inside dimensions. Right now, I'm using a 20x5mm cylinder with a 10mm square inside hole as a calibration piece (file attached). I priny a piece 19.6mm in diameter, 4.55mm high, and 9.69mm on the inside. Looking at the gcode, the nozzle moves 10.482mm with a .52mm extrusion width, making a 9.962mm hole. At the top, the gcode file includes thby coelestinian - Slic3r
Oil! (it worked on the QU-BD hotend, at least, but I only started printing a few days ago)by coelestinian - Reprappers
I had the same problems; my solution was to sharpen the gear with a Dremel and build a "minimalistic mk8" style contraption out of wood instead of using the standard feeder block; it holds a 608 bearing against the filament. It's not particularly pretty, but it works. I'd also check you hotend: mine became hard to push filament through. I cleaned it out as best I could (heat it up, use a needle)by coelestinian - Reprappers
So I looked over all the wires more. It's almost embarrassing; I started to make everything neater in order to reduce noise, and then I realized: for some reason or another, I was powering the stepper motors not off the correct channel, but instead the logic supply! That explains why, once, I was able to run the printer solely off USB power (no heater, of course). Anyways, may this be a lessonby coelestinian - Reprappers
I've done more testing: The problem is not the motor. If I try with all stepper drivers on the same settings and four of the same motors, nothing is fixed. The problem is not the driver. I can switch around drivers and wiring, but the same happens. However, the only time something goes wrong is when the extruder driver is connected (that is to say, 3 motors running). But if I disconnect a difby coelestinian - Reprappers
Never mind; it did not work...by coelestinian - Reprappers
So, I'm playing around with the wiring of the extruder driver. The printer still stops if the power to the driver is on, but the enable/step/dir pins unconnected. But it works if I power the driver off E1 rather than off E0. So how would I work with that in the Marlin firmware?by coelestinian - Reprappers
I was using Windows 7... The same happened on Windows XP on VMware (on Mac Pro)by coelestinian - Reprappers
Since it seemed something was wrong with the stepper driver, I switched it with the X driver. Nothing changed: it's not the stepper driver, but it still occurs that only when the extruder isn't powered, it works! Even stranger.by coelestinian - Reprappers
I tried to fix any problems caused by noise: I've run with both Marlin and Repetier firmware, Pronterface and Repetier-Host, down to 9600 baud. Also, I moved all wires near the USB connection away; nothing helped. I'm inclined to think it's not that. So then I focused on the extruder. The hot end is very reliable (QU-BD; it just needs a little oil), so it's either the stepper motor or driver forby coelestinian - Reprappers
If it helps, I've tried cutting the reset-en connection on the Arduino; it makes no difference.by coelestinian - Reprappers
Well, I can't figure out a good way to measure current on the printer, but with everything on it brings the voltage down to 11.45v at the least from 12.36v. There's no difference when it stops, and the power supply's fan is still working while the stepper driver LEDs (fancy, right?) are still on. Therefore, I don't think it's a brownout problem, or anything with power. The stepper driver currentby coelestinian - Reprappers
First, thanks for getting back... Anyways, I should have said instead that I do not experience the problem if I disconnect the extruder stepper driver and "print" without laying down any plastic; that is, the printer will go through all the movements perfectly through to the end of the print. I don't have a shielded USB cable that I can find, so I tried using a different cable through a route vby coelestinian - Reprappers
Right. I should add: If I disconnect the extruder motor controller (heater, fan still on), there is no problem. Maybe more mysterious?by coelestinian - Reprappers
Hello, forum! (this is my first post.) Anyways, I've built a prusa and am trying to start printing. It's able to get about thirty seconds in when, every time, it stops. Therefore, I have quite a few uncompleted bottom layers and nothing else. I'm using: -One prusa mendel. Fairly standard. -RAMPS -Modified QU-BD extruder -ProtoParadigm 1.75mm Natural ABS -EBay TB6560 single stepper drivers (I keby coelestinian - Reprappers