I've wired the end stops on pin 1 and 3, and patched the into 1,3,5. They echo correct values when pressed. Charlieby charliehuston - General Mendel Topics
Thanks for the suggestions, I figured as much, but its better to be sure and check all possibilities. Im doing a bit more forensics before I spend on a new board, and noticed something strange. Now when I turn the supply on, the arduino loses sync with the ramps board. When I turn it off, sprinter can connect again. The board still reads end-stop states accurately and my multimeter is giving meby charliehuston - General Mendel Topics
I've issued a G28/G90 command (I believe this homes in sprinter) but to no avail. Is it possible all three pololu drivers under test have burnt out without me knowing it? Or the fuse? I've tried to be careful not to overload the motors while testing them, and the motors seemed to be moving ok (albeit, a bit uncalibrated) before they stopped moving. I should also mention the motors don't appearby charliehuston - General Mendel Topics
Greetings all, Thanks again to those who helped me work out the end stop issue. Putting one end-stop per axis in the proper place allowed the end stops to return correct values with M119. Thing is, once I got this problem solved a new problem developed. The motors stopped moving all-together. I tried inverting the end stops thinking it may have appeared that the stops were triggered (haultingby charliehuston - General Mendel Topics
The RAMPs board has soldered to it a 2x6 pin header block. Currently plugged into this block is only the x-axis end-stops (since I am trying to evaluate one axis at a time before adding the remainder). I have five end-stops configured : one for the z-axis, and two for the x/y axes. I should add that I can now get the printer to stop when it reaches the end-stop on one side, but it still won'tby charliehuston - General Mendel Topics
Ok, after dabbling a bit with the M119 command and pullup settings in the configuration file, I can see the end-stop switches *tend* to switch when held down. The problem is that they don't *stay* in their inverted state. Im worried to start the motors up until the switches act consistently when held down. The switches again are wired as in the RAMPs 1.4 definition : Could this be due to theby charliehuston - General Mendel Topics
Hey Waitaki, I've got mechanical end stops wired as so : (the key diagram under Reprap Mega Pololu Shield) Shows the wiring to be on the first and third pins of the end-stop. I have wired it this way. Charlieby charliehuston - General Mendel Topics
Hey Fl0yd, The end stops have been wired. I plugged them in to the appropriately labelled ports, and issued the M119 command. They consistantly read x_min:H y_min:H z_min:H, though I have tried holding any of the stops down to get them to switch, which they don't seem to want to do. Are the motors programmed to go only one direction if the end-stops are not plugged in? Charlieby charliehuston - General Mendel Topics
Greetings fellow reprappers. I've been having some issues getting my mendel prusa up and running and was wondering if a seasoned reprapper could shed some light. The problem I am having is that pronterface only moves the motors on my mendal one way (ie. the positive direction) but never the other way. I've tried both fixes for this that I could find (reversing the motor pins on the RAMPs boaby charliehuston - General Mendel Topics
Greetings, I've been experiencing some frustration in getting my RAMPs to work, I was wondering if anyone could comment. Im using a lab supply right now to power the board (I am a bit paranoid about hooking up the modified ATX, worried about the high current and my expensive electronics) It seems the motors are turning with the test software, but I can't get them all running at one time. Pluggby charliehuston - General Mendel Topics
Thanks, the motors are humming nicely now!by charliehuston - RAMPS Electronics
Greetings all, Its my first build of a Prusa Mendel using RAMPs 1.4 shield on an Arduino Mega. The problem I am having is that the motors are not turning properly with test code. I am using a two-channel lab power supply that has variable 0-20V / 0-5A supply per channel (just to be on the safe side, I want to see the board work with this before applying a hacked ATX) The code in question is thiby charliehuston - RAMPS Electronics