Only one of the 6 sdcards I have here works with my SDRAMPS, none of the Kingston cards work, and that is noted on the wiki. The one working one I have here is a SanDisk 4GB. If you can read the card in the test app, there should be no issue in the firmware as long as the pins are set correctly in the firmware. My issue was a bad solder connection on the sdramps connector (bad soldering by me).by Polygonhell - RAMPS Electronics
I don't think you'll save anything going with the PI over the Beagleboard. You'd be looking at the Pi $35, the FPGA ~$12 some sort of board that would have to include ADC's. The Beagleboard already provides ENET and USB connections along with enough I/O including the ADC's with PRU's to operate in parallel for ~$90, I was just going to build a shield similar to RAMPS and use Pololu's. I have a 7by Polygonhell - Controllers
TI provide a no OS option for the OMAP series dev-boards BeagleBone/BeagleBoard, but they are a bit pricier than the Pi's ~$80, though they have better I/O options. I have one I've been messing with here, the issue is I want to use the GPU and all of that documentation is missing and the linux driver is based on a closed source binary. The OMAP processors however have an interesting feature, 2 Iby Polygonhell - Controllers
Most of us are using the 0.23 Arduino release rather than the 1.01, but I doubt it matters. The OP's issue was probably power, All Mac's can provide well over the minimum USB power requirements I believe they are rated for 1100mA on the USB 5V line so they can charge IPads. The standard only requires 500mA (900 for USB3 I think) which should be plenty, however there are other restrictions, mostby Polygonhell - RAMPS Electronics
It looks like an issue with the serial connection to me, possibly errors. If it were mechanical it wouldn't print in the right place after the pause, so I doubt the X-Carriage had anything to do with it. What connection speed are you using to the PC?by Polygonhell - General
You might not find the mill acceptable for longterm use as a 3D printer, nophead pointed out the speeds most printers run at, but there is more to it than that, most CNC machines run with a lot less acceleration than printers, and the bulk of the moves are really short, so even if you can get comparable rapids, I think you'll find it's practically a lot slower than a printer. I considered doingby Polygonhell - General
You can't really read resistance of a resistor while it's soldered to the board. If they are marked correctly for now I'd assume they are functional and the correct values, the fact they all read the same is probably a good indication they're functional.by Polygonhell - Reprappers
My first printer has springs to the heated bed, my MendelMax I mounted it rigidly, and it's a lot less hassle.by Polygonhell - General
If it's PLA you will need a fan blowing at the top of the Hotend. Though I have the older version of the Hotend. Mine Jams pretty consistently without a fan, when I strip it down it's always just expanded into the PTFE liner. With a fan I have yet to have a Jam.by Polygonhell - General
I don't have a copy of Slic3r here I can look at, but it's not the perimeter setting, I think it's called extrusion_width_ratio, it's the raio of extrusion width to layer height, so if you're printing 0.3mm layers 2.0 would be 0.6 mm width.by Polygonhell - Slic3r
Actually I absolutely agree on the GCode issue, and it seems to me like Marlin/Sprinter/Repetier has already pretty much dictated that, though I wish most firmware and slicers supported G2/3. The cube issue is more it encourages a specific shape to the build volume, one that makes less and less sense as the X and Y dimensions get bigger, why not classify in cubic inches or cm's, calculated at Xxby Polygonhell - Developers
The wall thickness is too wide for slic3r to get any infil in there. Assuming you have sensible infill settings (100%). You have a couple of options, Set the wall thickness to be more narrow, this is the setting most Slic3r users leave at 0 to have it automatically calculated. Lying about your nozzle size will do much the same thing.by Polygonhell - Slic3r
OK this appears to be a issue in the Marlin and I guess Repetier RAMPS setup when plugging directly into the Arduino. The RAMPS1.3/1.4 configuration doesn't define the SDPOWER pin in pins.h, the connector on the RAMPS1.4 is supposed to have 5V pin where pin 48 would be, so this should not be an issue with the ramps board connected. My best guess is I have a bad solder connection on the RAMPS boaby Polygonhell - RAMPS Electronics
I believe it's the Honeywell thermistor, number 7 in RC2. At least that's what mines set to.by Polygonhell - Firmware - mainstream and related support
Assuming it's not a gcode issue, which I'd be surprised if it were. The lift is probably trying to move Z faster than the regular layer changes resulting in lost steps. Backlash should only impact the very first time the lift occurs, it's usually repeatable and it doesn't accumulate.by Polygonhell - Slic3r
The problem with standards like that is they do not match the typical print a plate of parts usage pattern, why classify by the smallest dimension when for most prints X and Y are more significant. You start classifying like that (or in any recognized way) and you'll start to see gamesmanship in designs, compromises to get the classification a designer wants. FWIW there is already a driver to sby Polygonhell - Developers
Bumping this because.my sdramps also works in sdrampstest, but fails to initialize in both Marlin and Repetier. What's bizarre about this is it was working, I pulled the sdcard copied a file to it, plugged it back into the sdramps and since then it fails to initialize. As I mentioned above I can run the card and it passes and lists files using sdrampstest, load marlin or repetier on that arduinoby Polygonhell - RAMPS Electronics
In practice a lot of the modularity just happens because people rarely design everything from scratch. Unless your doing something very different It's easier to just design something that uses the PRUSA carriage or similar. OpenSCAD takes some of this away, since you can just tweak the parameters. Right now there seems to be a lot of motion towards gantry type designs and on those there isn't a lby Polygonhell - Developers
I would tend to agree, having multiple models almost guarantees an issue since there is always going to be at least a discontinuity in the differential, if not in the actual values.by Polygonhell - Slic3r
On the Pololu's there is a very small pot on one side of the board (can't remember if it's left or right, it looks like a silver square with a silver circle on top that might take a phillips head screwdriver. One of my machines is very picky about exactly where this is set, it's largely todo with the steppers. If it's set too low, you'll lose steps intermittently, if it's set to high the driver cby Polygonhell - General
Sounds like you need to turn down the gain on the stepper drivers very slightly.by Polygonhell - General
Sublime Wrote: ------------------------------------------------------- > nophead Wrote: > -------------------------------------------------- > ----- > > The flow rate maths in Slic3r seem broken to > me. > > When I went to lower layers I had to change the > > extrusion multiplier to 0.85. When I went back > to > > higher layer height I had to put it back toby Polygonhell - Slic3r
The 1.5 ratio is extrusion width over layer height, below that layers tend not to stick well. If it's set to 0 Slic3r will compute something, it's usually closer to 2.0. Perhaps somewhat counter intuitively nozzle diameter does not directly affect extrusion width.by Polygonhell - General
It's backlash, in what ever direction that flat is from. Check you're belt tension and make sure you're gears are tight on the steppers. You can usually see the belt stop as it goes around the corner and see that the stepper continues to turn.by Polygonhell - General
Turn down the gain pot on the stepper driver board until it stops. The stepper driver is overheating.by Polygonhell - General
It's backlash, check your belt tension.by Polygonhell - General
There are a lot of options under $1000, and I agree with everyone else it isn't worth building a rep-strap to print the plastic parts. There is a good chance you'd spend the cost of the parts in plastic by the time you's got everything calibrated and the part set successfully printed on the repstrap.by Polygonhell - General
Mine does exactly this, with 2 ramps boards, put a small fan in a position to blow air over the larger fuse. The fuse will go from being finger burning hot to tepidly warm and the problem will go away. I have a 80mm fan positioned to blow air over the electronics and just directly wired to 12V. I suspect the issue is that the Mk2 bed I have has marginally low resistance, it measures 1.3 Ohms, buby Polygonhell - General
Just download the scad file and remove the hole. It's what I ended up doing after I had the same issue.by Polygonhell - Reprappers
If your firmware is setup correctly then the only thing it's doing is following the GCODE that slic3rproduced, can you post the first dozen lines of code or so, working and not working, since the error is at the start that shood be enough. You aren't trying to use the 0.7.1 config with 0.8.x are you? There are known incompatabilities.by Polygonhell - Slic3r