My Prusa clone is producing horizontal bands at 2mm spacing to start with, then 1.5mm upwards on a 1cm test cube. I have checked z wobble and changed belts on both axes. I have re-lubricated the z threads as well. It happens on both the X and Y axis. Any ideas would be much appreciated.by Focussys - Prusa i3 and variants
Many thanks for coming back. In the end because the endstop pin was pulling up I decided to try pulling it down. I used a 560 ohm resistor from the PNP sensor output to an opto isolator. The output then went to the endstop pin and ground. So the mini relay effect worked fine. When the sensor output triggered at 12v it powered the opto which shorted the endstop pin. #define Z_MIN_ENDSTOP_INVERTby Focussys - Controllers
I recently bought a Bigtreetech SKR 1.3 board as a replacement for an Arduino and Ramps 1.4 and am having difficulty setting up the existing Z probe (LJ12A3-4_Z/BY). The endstop pins appear to have a pullup resistor built in preventing the probe activating . The probe is normally open and 5v upon trigger. The endstop pin shows 2.40v unconnected and this pulls the normally open probe up showingby Focussys - Controllers
Many thanks for coming back. Sadly, as I mentioned I have both swapped and replaced the Z driver. I have just discovered the issue is with Slic3r as by changing back to Matterslice it disappears! I suppose it is a fix although Slic3r can be useful for some printsby Focussys - Prusa i3 and variants
HI I am using a Prusa I3 Mk2 upgraded clone with Ramps 1.4, A8994 drivers and Mattercontrol. Recently, after printing perfectly for days, the z axis has started ticking and slowly moving upwards before a print. This only happens between pressing the print button and the hotend moving to its print position. I have tried: 1. Swapping drivers 2. Setting a lower Vref 3. Checking ease of movement oby Focussys - Prusa i3 and variants
Many thanks for coming back so quickly. My steppers are 1.68A, so I assume 0.63V. I have set High Low High (1/32)and I am still skipping X direction on tall items. I still have 0.72v set so will try lower.by Focussys - Stepper Motors, Servo Motors, DC Motors
I noticed this is the only place discussing MKS LV8729. I have just fitted two (Xand Y) to test on my Prusa I3 MK2 upgrade and have found them very quiet. Just wondered if anyone has the settings in Marlin for smooth operation and the Vref they are using for the drivers? I have changed MS01,1,2 and found no difference. Welcome any input.by Focussys - Stepper Motors, Servo Motors, DC Motors
Many thanks for adding to this, o_lampe. I have replaced the bearings and wheels but had the same problem afterwards. Now need to see if I have a weak driver again. Do you guys have Vref for the A4988s that you are using?by Focussys - Delta Machines
Thanks again. They have flats and are tight. Will try the whole change of belts . Cheers.by Focussys - Delta Machines
Many thanks for the suggestion. I did change one belt without success. I have now changed all the plastic pulley wheels as the old ones were a little stiff. Old oil possibly. Jumping sideways every 2.4mm in height. Now tried switching slicer from Matterslice to Curaslice and the big steps have changed to 11.4mm! The slope which appears very small now.by Focussys - Delta Machines
Many thanks for that. I will try that tomorrow. Best regards.by Focussys - Delta Machines
Hi All I have owned a Micromake D1 Delta for some time and it has printed very well till now. Recently it started printing on a slope towards one tower. Now it is jumping wildly as well. I have tried: Measured the endstop heights. Rotated A4988 boards. Rotated stepper connections. Changed a stepper opposite the direction of slope. Changed motherboard from Arduino/Ramps 1.4 to Makeboard Pro. Addby Focussys - Delta Machines
Just upgraded my Micromake Delta from Arduino Mega/Ramps 1.4 to Micromake's own Makeboard Pro.. Uploaded the same firmware as before and everything works exactly as before except: Having done the autobed level in Cura's Machine Debugger (now 0.06mm accurate) it prints about 3mm above the bed. I use Mattercontrol, so should be able to adjust it downwards as before with a negative number, but it wby Focussys - Delta Machines
Hi everyone I have sort of cured the problem in a drastic way. I have swapped out the extruder and stepper and installed a planetary geared 5:1 stepper and aluminium direct drive extruder. The clicking noise has reduced to once every few seconds as against 10 times a second. It seems like cheating as I am no closer to a fix of the original hardware. Still, thanks to all who contributedby Focussys - Delta Machines
Hi Khalid Yes , I have tried different filaments from a variety of suppliers. I will try some PLA, I have a reel of, over the weekend.by Focussys - Delta Machines
Hi Sir_Death I have ordered an extruder as you suggest. I am getting desperate so will try anything to solve this. I am not sure how to solve the USB problem. I have shortened the 5Mtr cable to 2Mtrs but little has changed. Running from SD card did improve the output significantly. If I haven't mentioned it before I am printing ABS at 235 C.by Focussys - Delta Machines
Hi Guys I have manually fed filament through with no heavy force required. The filament exits straight down with no curls. The spec of the stepper is: Step Angle: 1.8 Motor Length: 60mm Rated Current: 1.5A Phase Resistance: 2.5Ohm Phase inductance: 4.5mH Holding Torque: 67.3N.cm Flying Lead Count: 4 Dc42, I cannot see the resistors on the DRV8825 they are too small for one so old! I have reby Focussys - Delta Machines
Hi nebbian I have adjusted the ref voltage to 0.5v then either side to see if the stepper quietens down. No setting seems to solve it. I have turned off retraction to see if that has an effect and used Cura matterslice and slic3r in case that is involved. I thought it was going to be something silly I had missed! Looks like plan B and change the extruder is next.by Focussys - Delta Machines
Well, for all of you who were placing side bets on which was the best solution, print from the SD card produced a near perfect print. The USB must be affecting the print quality, but the gattling gun sound from the extruder stepper persists and may be the cause of the gaps in the near perfect straight parts in the side walls. So I am half way to a best print. Thank you all. My idea to solve theby Focussys - Delta Machines
Thanks everyone for you ideas. I will try them all. I noticed a 5Mtr USB lead caused the print to stop occasionally and I have moved the printer closer to be able to use a 2mtr lead. I am using a Mega board and Ramps 1.4 so thanks for that one as well. I will report back with outcomes.by Focussys - Delta Machines
Hi rollingdice Thanks for coming back. I have checked the drive gear and all is clean. The stepper is jumping back all the time as if there is too much pressure. I have hand pushed the filament through and there is little resistance. As the straght parts print OK, as in the photos, I have tried different slicers to see if it is software related. Still no joy.by Focussys - Delta Machines
I have a Chinese Micromake Kossel Mini that has been working well since build 6 months ago. Recently it has started skipping over circles and the extruder judders badly. Straight lines are no problem and print fine. I have checked stepper current, changed stepper to a bigger more powerful version thinking it was not coping with my 0.4mm nozzle. Checked 12v supply, changed driver board from A4988by Focussys - Delta Machines
Hi All My Prusa I3 has been printing fine for a few days now, but I have been having problems getting the ABS to stick to the bed. I decided to add bed levelling to get more accuracy. So far the levelling part works fine, but when I home all in Pronterface the head tries to bury itself in the bed. I tried adding back the z axis endstop in series with the probe only to find it doing the same thiby Focussys - General Mendel Topics
Hi Most appreciated. I did most of the work on a tablet and forgot to include U8glib in the main PC libraries folder.when I transferred it. All working fine now. Many, many thanks.by Focussys - General Mendel Topics
Hi Many thanks for coming back. I have downloaded a new version from Github, copied the libraries to arduino and defined the full graphic card. I think I made it worse! Here is the error I get now: In file included from /dogm_lcd_implementation.h:38, from ultralcd.cpp:36: dogm_font_data_marlin.h:13: error: 'u8g_fntpgm_uint8_t' does not name a type dogm_font_data_marlin.h:172:by Focussys - General Mendel Topics
Hi all you techies. Just built my Prusa i3 and hit a snag installing my Full Graphics Controller. I have set up and compiled Marlin without the controller installed and everything prints fine When uploading with the controller defined I get an error with the following orange text: ]Marlin_main.cpp: In function 'void process_commands()': Marlin_main.cpp:1631:31: error: 'allow_cold_extrudes' waby Focussys - Firmware - mainstream and related support
Hi all you techies. Just built my Prusa i3 and hit a snag installing my Full Graphics Controller. I have set up and compiled Marlin without the controller installed and everything prints fine When uploading with the controller defined I get an error with the following orange text: ]Marlin_main.cpp: In function 'void process_commands()': Marlin_main.cpp:1631:31: error: 'allow_cold_extrudes' waby Focussys - General Mendel Topics