Assuming the wiring and switches are good It's likely the Firmware is incorrectly configured for the endstops, i.e. you need to invert the expected signal.by Polygonhell - General
You probably just have the gain too high on the driver, turn the pot anti clockwise while driving the stepperby Polygonhell - RAMPS Electronics
Your skipping steps, my first guess assuming it's nt mechanical is that the stepper driver is overheating as the print progresses. Turn the pot anti clockwise just a small fraction and see if that helps.by Polygonhell - Reprappers
How does it move with the belt on and the stepper un powered? There will obviously be resistance, but do you feel anything other than the stepper steps? Assuming it feels as you would expect, then it's probably not a mechanical issue, so the next thing I'd try is swapping the X/Y wiring at the control board, if that didn't work I'd try swapping the steppers as well.by Polygonhell - General
Once an overhang is greater then 45 degrees and bridging is not possible, you need support. Plastic wil not stick to plastic right next to it, or if you can get it to do it, I'd like to know how.by Polygonhell - General
I'm building a second printer, and I've been looking at Extruders, most of the widely used designs (Wades etc) seem to have about 3:1 or 4:1 gearing. Does anyone have a source where the "ideal" gearing for a particular setup is calculated. I understand there are a number of factors nozzle size, filament diameter temperature, plastic etc. I'm just wondering where the 3:1 or 4:1 actually came fromby Polygonhell - General
I've seen PC PSU's that require as much as a 2A load on the 5V line to get a consistent 12V from the 12V line. They're not worth the effort IMO unless you have specific knowledge it will work without a load and some do.by Polygonhell - General
Do they "lockup" (i.e. become difficult to turn by hand) when you plug them in? How do you have them wired? How are the pots on the drivers set?by Polygonhell - General