Update: Slowing down helped but did not solve the issue. I rolled back to Cura 3.5.0 and that fixed the issue. Not sure what changed in 3.6.0 but something is either overloading the Arduino or something is bugging.by LFG - General
Well I think I have solved the issue but I am not happy about it. So after reviewing everything I determined that I needed to slow down my printing speed. I was slicing with a speed of 60mm/s and have now lowered it to 45mm/s. I have not ha an issue with any more Thermal Runaways on the new slices but printing at 45mm/s is frustrating. I have determined that all this started when I had to upgradby LFG - General
An interrupted or unpowered stepper coil usually result is a grinding shuddering noise and no movement unless being assisted by a slight on the stepper int he direction of motion. Be sure your Stepper wiring connectors are working. If you can, use jumper cables and a volt meter/amp meter to confirm that you have wire connections from end to end. I found a few issues with bad crimps by checkingby LFG - RAMPS Electronics
Thank you dc42, I guess I never realized that there could be an issue like this. I recently converted my printers over to Octoprint control via a PI on each machine, so it is getting the programming for the print through the USB. I am a Civil Engineer my trade so that last bit of electrical/computer programming went over my head but it would appear I need to slow my prints or refine the Marlin sby LFG - General
I have three custom printers that are running Marlin 1.1.7 on a Arduino Mega 2560 with 4988 shields. The steppers are all 1.8s but are from multiple sources. I am using E3D clones for hot ends and near constant 100% fan speed for part cooling. I have printed numerous prints on each machine and am still printing strong. Lately I have been designing organizers for the Runebound game which I have bby LFG - General
Moving my discussion to a new thread.by LFG - General
It's a thermal runaway error but its due to something in Cura. I have repeated it numerous times and in numerous ways so I am getting more confident in my diagnosis. If you go back to my previous post I have a temp graph listed there that shows the slow degradation of the hotends ability to regulate temperature. Basically, it seams to be related to wall thickness. If I set a thickness between 1by LFG - General
Ok, fixed Issue 2. Turns out it was a bad connection on the end stop. Issue one is mostly corrected but I am still getting occasional Y-axis lost steps. I have tuned the rivers and tried two different steppers. My other two printers are running the same configurations and are having no issues. I have checked and re-checked for Y-axis binding but I have not found any issues. So, again I ask whby LFG - General
Not sure if anyone is still following this thread but I have a similar issue so I'm hoping... I am running 3 different printers that are home built I3 clones running Ramps 1.4s with Marin 1.1.7 firmware. I am having thermal runaway errors at exactly the same spot across different printers. I was using an older g-code slice with Cura 3.5 that I've printed 12 to 20 times but the last 7 tries havby LFG - General
I have 3 custom built printers, two of which are converted Anet A8's. All three are running Ramps 1.4 boards with Mega 2560's from ZYLtech. All three are flashed with the same 1.7 build. One of the printers is working great so there is no issue with the software build. I am heaving two separate issues with the two that aren't functioning. 1st issue on printer "Gray" is that it seems to work gby LFG - General
What is the difference between these lines? #define DEFAULT_MAX_ACCELERATION { 2000, 2000, 100, 2000 } #define DEFAULT_ACCELERATION 400 // X, Y, Z and E acceleration for printing movesby LFG - Firmware - Marlin
Well the cat gets me again. I am still seeing a 1mm rise in Z after homing before 1st layer.by LFG - Firmware - Marlin
NM Figured it out. I am dumber than my own cat some days.by LFG - Firmware - Marlin
My Cartesian printer is gaining 2-mm on Z after homing and moving into the print area. Needless to say the prints aren't sticking. This is a new built printer and all other features are working now that I have gone to Marlin 1.1.7 See attached configs.by LFG - Firmware - Marlin
Well, That worked. I have flashed the build with 1.1.7 and the Z stepper issue went away. Everything homes. Now I'm on the chasing a run away heating problem. I may have the bed and nozzle wired to the wrong spots. Bah! A problem to be conquered tomorrow. Thank you greatly Dust. I searched and searched but couldn't get the link to come up.by LFG - Firmware - Marlin
I am looking for version 1.1.7 but have been unable to locate a source. Is it still available?by LFG - Firmware - Marlin
GentleRV, I can't assist you in determining how to solve your problem, but I am experiencing a similar issue with Z steppers not working together as expected. I have now setup two Cartesian printers with Marlin 1.1.9 and during homing the Z steppers are loud, make a grinding noise and seem to be working independent of each other. I think it's a Marlin programming issue for the RAMPS board. I fiby LFG - Firmware - Marlin
Figured I post some pics of the conversion and build. Orange is still running on an Anet A8 board. Pink is the second Anet which is supposed to go straight to a Ramps 1.4. Gray , the 3rd printer is the one that is currently setup on a Ramps 1.4 with problems, as discussed above. Looks like .1 is the correct Rs. So the math would look like this right? Vref= 0.7 *8 *.1 = 0.56V Steps calculatby LFG - Extruded Aluminum Frames
I would agree that the numbers seem high. I have been looking for the discussions on calculating these number but have yet to find them. I just doubled the marlin defaults based on the .9deg vs 1.8deg steppers. I don't have a clue what to use as acceleration numbers. those are again the defaults. Being parallel to the bed is not a thing I am currently concerned with as the twisting as the z stby LFG - Extruded Aluminum Frames
Update: I have adjusted the settings as listed below: #define DEFAULT_AXIS_STEPS_PER_UNIT { 160, 160, 8000, 1000 } <---Doubled these due to 0.9deg steppers #define DEFAULT_MAX_FEEDRATE { 200, 200, 2, 25 } <----Dropped these from 300, 300, 5, 25 #define DEFAULT_MAX_ACCELERATION { 3000, 3000, 100, 10000 } <---- Do I need to change these? I also cranked the pots dby LFG - Extruded Aluminum Frames
I've run though few different options now and the one I finally settled on is a plain glass piece from Lowes. The trick is to keep it clean. Remember that fan is blowing air across the glass the entire time so it gets a film of dust/dirt stuck to it pretty easy. I am sure vinegar or alcohol work great but I found that buying a bottle of eye glasses lens cleaner and a micro fiber towel from Waby LFG - General
Thanks for the link with the calculations. Few questions: Where do I get the current limit used in the calculation from? (is it the 0.9A listed in the stepper description?) I assume I have Chinese knockoffs with a Rs=0.1, is there a way to check? On a different topic I purchased 0.9deg Nema 17 Stepper Motor Bipolar 0.9A steppers. I assume that the 0.9deg means I need to adjust the step distaby LFG - Extruded Aluminum Frames
OK. witched to NC endstop config. re-oriented the red and blue pair and enabled pullups as noted above. haven't homed yet. Had to flip orientation of all stepper plugs to reverse directions. X-axis responding correctly, though heat sink of stepper got hot fast. Y axis responded correctly. Z got much better but still jerks funny and screams when moving. Pretty sure step setting is off and that I nby LFG - Extruded Aluminum Frames
Please bear with me I'm a civil engineer. I can calc you storm water and size a foundation but I have no idea what you mean when you say enable internal pullup resistors. Are you saying to un-comment the X/Y/Z min endstop pullup in the marlin code as shown below? // Enable pullup for all endstops to prevent a floating state #define ENDSTOPPULLUPS #if DISABLED(ENDSTOPPULLUPS) // Disable ENDSTOPby LFG - Extruded Aluminum Frames
Well I am 4-month into this current rabbit hole of 3D printing. I Have 2 Anet A8 builds that were up and running when I decided to convert them to Extruded Aluminum cube frames. I completed (mostly) the first conversion about 3 weeks ago and decided that I'd build a 3rd printer before converting the 2nd Anet because I had over purchased so many parts. To that end now I have the printer about 85by LFG - Extruded Aluminum Frames