Printing in the front right corner and then goes nuts
Hello,
I have finished assembling my Prusa One Core kit. I have been able to get the x/y completely square and the belts both at 85hz. The x/y calibration fails unless I manually move the head to the front left and manually set the position to 0, 0. After I do this, the calibration almost always succeeds. When I go to print anything,
- The printer does the homing dance in the front right corner.
- Sometimes this is fast, sometimes it takes minutes
- It cleans the nozzle right on the edge in the front right.
- It goes to the middle of the print area and checks a bunch of points
- Then it goes back to the front right and checks a bunch of points
- It then starts printing in the front right corner
- It will usually print the first layer of something (if it is very small)
- Then it goes nuts and starts just shooting spiderwebs all over the place.
When I stop the print, everything is messed up and I have to start completely over with calibration.
What is going on here? How can I fix it?
RE: Printing in the front right corner and then goes nuts
Update. I have tried the 6.3.2, 6.3.3 and 6.3.4 firmware. None of them fix the problem but now I cannot even get it through calibration.
RE: Printing in the front right corner and then goes nuts
"Shooting spiderwebs" - often that's due to wet filament. It can also be due to printing "in air" when positioning goes awry. That seems kind of likely here.
Your sequence of events is right, except that when properly tuned mine almost always does just a few bangs and continues with the clean-probe-print steps.
I think you need to get the calibration problem figured out before trying to print. With power off or motors disabled, how easy is it to move the extruder around? You shouldn't have any binding anywhere.
Have you lubed the y-axis rods? Have you verified that the pulleys are correctly installed on the X and Y steppers? It's pretty easy to fall into the trap where you install both in the same direction
If you connect a terminal (OctoPrint or Pronterface) you can see what the printer is detecting when trying the homing steps. When my belts were mis-tensioned I could see that the calibration was inconsistently detecting the position where it was hitting the stops. If the position changes "too much" (I don't know what that limit is), then the printer keeps trying.
RE: Printing in the front right corner and then goes nuts
Im having the same problem.
RE: Printing in the front right corner and then goes nuts
Having the problem with printing in the front right corner. You ever find out how to fix itt?
RE: Printing in the front right corner and then goes nuts
Having the problem with printing in the front right corner. You ever find out how to fix itt?
Please describe in more detail what printer behavior you observe. The OP mentioned multiple, potentially unrelated issues.
As a side note, what is the idea behind your choice of avatar picture? Not sure whether that's how you want to greet the other forum participants whom you are asking for help.
RE: Printing in the front right corner and then goes nuts
Having the problem with printing in the front right corner. You ever find out how to fix itt?
Please describe in more detail what printer behavior you observe. The OP mentioned multiple, potentially unrelated issues.
As a side note, what is the idea behind your choice of avatar picture? Not sure whether that's how you want to greet the other forum participants whom you are asking for help.
Talked with tech support for a few hours last night and they ran me through a bunch of stuff. Thay can up with the conclusion this I had a bad main cable.
RE: Printing in the front right corner and then goes nuts
Have the same problem after build my conversion kit. yesterday i found another belt tension information upper belt 98 hz and lower belt 92 hz. after i fix this, my prusa can print the keychain. before this, i get sometimes the error that says "precise homing error...." but now i look for better slicer configuration... what the core is doing before start print ist horrorible and need so much time... "homing dancing, nozzle cleaning, running probing points, nozzle cleaning, ... now i put my files manually on the usb stick , not used connect and this works fine????
RE: Printing in the front right corner and then goes nuts
I am experiencing the same issue except for the spiderwebs.
I my case it just does not extrude any filament at all after purging. There is a clicking that makes me suspect the nozzle may be partially clogged, but the positioning is the main issue.
This was a factory assembled unit. It printed the keychain from the flash drive properly, then I sent a small print from the slicer, and it printed right up to the last couple of layers then had an issue that I attributed to the part being very small at that point.
When I try any file now it does the dance for varying lengths of time, then tries to print at the front right corner. It purges and I can feel the filament feeding from the spool (filament is the roll that came with the printer). Then it stops being fed after the print starts.
I updated the firmware to the most recent, no change. I ran the auto home option last night and it ran fine but still tried to print in the wrong place. I tried to run it today and it thumped for 2-3 minutes then reset the display and gave me a QR code about alignment. I went to that page and checked the front corners and they seem fine. No play at all when it is move forward. I cant even slip a piece of paper between the surfaces on eithet side. I checked belt tension and got 93, and 94 hz.
I ran the Auto Home again and it took about 10 seconds and passed. I ran it a second time it passed quickly again. Then I tried the print again and got the same results. Ran Auto Home after and it passed fine.
This is a short video of what is happening when it starts to print. I apologize for the horrible camera work.
https://youtube.com/shorts/G4E7p_iKW5s?feature=share
RE: Printing in the front right corner and then goes nuts
Much of that video is correct activity. The printer does the nozzle cleaning, probes the bed, then comes back and does the three touches after leveling.
Then there's the delay as the filament comes up to temperature, followed by the purge line being laid down. All good up to this point.
Then it goes badly wrong. That scream before it starts printing in mid-air indicates that it's trying to perform a quick motion in the "y" axis but something is binding up and blocking the re-positioning. Before worrying about extrusion, check the belts, motors, bearings, etc. to see what is inhibiting motion.
With power off, you should be able to easily move the extruder all of the way around the print bed. There shouldn't be any real difference moving x versus y. There's some resistance, but you should not have to work hard to move it.
Check your pulleys to make sure one isn't upside down. To check them, look at the holders for the motors on the left and right, back of the printer. When you look into the hole in the left one, you should see the collar holding the grub screws, and on the right you should see the toothed part of the pulley. I don't think that's what's going on, but it's worth checking.
RE: Printing in the front right corner and then goes nuts
update… i put prints directly per pc on the usb stick, they work…. over connect in browser they dont…. deinstall the slicer software with all configs, deinstall app on mobile… go to connect per browser and delete the printer there… now install latest slicer version, and connect the printer new.. install app etc. now it all works 👍 my problems solved, i think that after upgrading the printer, everywhere old configurations trigger the problems…
RE:
Much of that video is correct activity. The printer does the nozzle cleaning, probes the bed, then comes back and does the three touches after leveling.
Then there's the delay as the filament comes up to temperature, followed by the purge line being laid down. All good up to this point.Then it goes badly wrong. That scream before it starts printing in mid-air indicates that it's trying to perform a quick motion in the "y" axis but something is binding up and blocking the re-positioning. Before worrying about extrusion, check the belts, motors, bearings, etc. to see what is inhibiting motion.
With power off, you should be able to easily move the extruder all of the way around the print bed. There shouldn't be any real difference moving x versus y. There's some resistance, but you should not have to work hard to move it.Check your pulleys to make sure one isn't upside down. To check them, look at the holders for the motors on the left and right, back of the printer. When you look into the hole in the left one, you should see the collar holding the grub screws, and on the right you should see the toothed part of the pulley. I don't think that's what's going on, but it's worth checking.
Based on my original correct prints, I was pretty confident the initial part was running correctly too. Someone confirming that makes me feel better though. (Part of that delay was me not noticing the prompt to check that the vent was open)
With power off the head mover around freely. No binding at any point. I checked the pulleys and they appear exactly as you described. Being a factory built system, I was pretty sure they would be correct too.
I am starting to suspect the firmware update I did after the first two prints. After doing a little reading and looking at the post after yours, I may try a factory reset too. The fact that the probing goes to the proper spots, but the print is trying to center on the right front corner makes me feel like a software issue. Maybe something failed during that step. Taking it back to the simplest settings will be my next step
RE: Printing in the front right corner and then goes nuts
Having the problem with printing in the front right corner. You ever find out how to fix itt?
Please describe in more detail what printer behavior you observe. The OP mentioned multiple, potentially unrelated issues.
As a side note, what is the idea behind your choice of avatar picture? Not sure whether that's how you want to greet the other forum participants whom you are asking for help.
Talked with tech support for a few hours last night and they ran me through a bunch of stuff. Thay can up with the conclusion this I had a bad main cable.
Got the new cable, changed it out and still a no go!!!
RE: Printing in the front right corner and then goes nuts
Got the new cable, changed it out and still a no go!!!
My suggestion still stands: Please describe in more detail what printer behavior you observe.
RE:
Much of that video is correct activity. The printer does the nozzle cleaning, probes the bed, then comes back and does the three touches after leveling.
Then there's the delay as the filament comes up to temperature, followed by the purge line being laid down. All good up to this point.Then it goes badly wrong. That scream before it starts printing in mid-air indicates that it's trying to perform a quick motion in the "y" axis but something is binding up and blocking the re-positioning. Before worrying about extrusion, check the belts, motors, bearings, etc. to see what is inhibiting motion.
With power off, you should be able to easily move the extruder all of the way around the print bed. There shouldn't be any real difference moving x versus y. There's some resistance, but you should not have to work hard to move it.Check your pulleys to make sure one isn't upside down. To check them, look at the holders for the motors on the left and right, back of the printer. When you look into the hole in the left one, you should see the collar holding the grub screws, and on the right you should see the toothed part of the pulley. I don't think that's what's going on, but it's worth checking.
Based on my original correct prints, I was pretty confident the initial part was running correctly too. Someone confirming that makes me feel better though. (Part of that delay was me not noticing the prompt to check that the vent was open)
With power off the head mover around freely. No binding at any point. I checked the pulleys and they appear exactly as you described. Being a factory built system, I was pretty sure they would be correct too.
I am starting to suspect the firmware update I did after the first two prints. After doing a little reading and looking at the post after yours, I may try a factory reset too. The fact that the probing goes to the proper spots, but the print is trying to center on the right front corner makes me feel like a software issue. Maybe something failed during that step. Taking it back to the simplest settings will be my next step
Here is an update to this issue. Factory reset did not help, isolating the system from any outside/internet access did not help.
After the test print failed to print in the correct location from the flash drive, I went to the Move Axis, and tested the range of motion for all three directions. X and Z had full range of motion, but Y was offset towards the front by half the plate. I could only move the head halfway back with the knob.
I looked around the menus and reran the Auto Home. After that I had the full range of motion available on all three axis.
I started the test print and saw it probing all 20 locations in preparation for printing. It cleaned and purged the nozzle them went to the wrong location to print again.
I aborted the print, then went back to the move axis menu and both X and Y had lost their calibration. Using the knob they would hit their limits around the middle of the build plate. I ran Auto Home again and it went back to full range.
It appears that just before the print when it does a quick test of the font and right edge it throws the positioning off by about half of the build plate
RE: Printing in the front right corner and then goes nuts
Much of that video is correct activity. The printer does the nozzle cleaning, probes the bed, then comes back and does the three touches after leveling.
Then there's the delay as the filament comes up to temperature, followed by the purge line being laid down. All good up to this point.Then it goes badly wrong. That scream before it starts printing in mid-air indicates that it's trying to perform a quick motion in the "y" axis but something is binding up and blocking the re-positioning. Before worrying about extrusion, check the belts, motors, bearings, etc. to see what is inhibiting motion.
With power off, you should be able to easily move the extruder all of the way around the print bed. There shouldn't be any real difference moving x versus y. There's some resistance, but you should not have to work hard to move it.Check your pulleys to make sure one isn't upside down. To check them, look at the holders for the motors on the left and right, back of the printer. When you look into the hole in the left one, you should see the collar holding the grub screws, and on the right you should see the toothed part of the pulley. I don't think that's what's going on, but it's worth checking.
Based on my original correct prints, I was pretty confident the initial part was running correctly too. Someone confirming that makes me feel better though. (Part of that delay was me not noticing the prompt to check that the vent was open)
With power off the head mover around freely. No binding at any point. I checked the pulleys and they appear exactly as you described. Being a factory built system, I was pretty sure they would be correct too.
I am starting to suspect the firmware update I did after the first two prints. After doing a little reading and looking at the post after yours, I may try a factory reset too. The fact that the probing goes to the proper spots, but the print is trying to center on the right front corner makes me feel like a software issue. Maybe something failed during that step. Taking it back to the simplest settings will be my next step
Here is an update to this issue. Factory reset did not help, isolating the system from any outside/internet access did not help.
After the test print failed to print in the correct location from the flash drive, I went to the Move Axis, and tested the range of motion for all three directions. X and Z had full range of motion, but Y was offset towards the front by half the plate. I could only move the head halfway back with the knob.
I looked around the menus and reran the Auto Home. After that I had the full range of motion available on all three axis.
I started the test print and saw it probing all 20 locations in preparation for printing. It cleaned and purged the nozzle them went to the wrong location to print again.
I aborted the print, then went back to the move axis menu and both X and Y had lost their calibration. Using the knob they would hit their limits around the middle of the build plate. I ran Auto Home again and it went back to full range.
It appears that just before the print when it does a quick test of the font and right edge it throws the positioning off by about half of the build plate
Had the same problem. After hours in chat with tech support and no solution to the problem, I took it apart and found I need to remove 2 screws that were getting in the way. One on each side. It was the right size screw. It just seems like a design flaw or something.
RE: Printing in the front right corner and then goes nuts
Much of that video is correct activity. The printer does the nozzle cleaning, probes the bed, then comes back and does the three touches after leveling.
Then there's the delay as the filament comes up to temperature, followed by the purge line being laid down. All good up to this point.Then it goes badly wrong. That scream before it starts printing in mid-air indicates that it's trying to perform a quick motion in the "y" axis but something is binding up and blocking the re-positioning. Before worrying about extrusion, check the belts, motors, bearings, etc. to see what is inhibiting motion.
With power off, you should be able to easily move the extruder all of the way around the print bed. There shouldn't be any real difference moving x versus y. There's some resistance, but you should not have to work hard to move it.Check your pulleys to make sure one isn't upside down. To check them, look at the holders for the motors on the left and right, back of the printer. When you look into the hole in the left one, you should see the collar holding the grub screws, and on the right you should see the toothed part of the pulley. I don't think that's what's going on, but it's worth checking.
Based on my original correct prints, I was pretty confident the initial part was running correctly too. Someone confirming that makes me feel better though. (Part of that delay was me not noticing the prompt to check that the vent was open)
With power off the head mover around freely. No binding at any point. I checked the pulleys and they appear exactly as you described. Being a factory built system, I was pretty sure they would be correct too.
I am starting to suspect the firmware update I did after the first two prints. After doing a little reading and looking at the post after yours, I may try a factory reset too. The fact that the probing goes to the proper spots, but the print is trying to center on the right front corner makes me feel like a software issue. Maybe something failed during that step. Taking it back to the simplest settings will be my next step
Here is an update to this issue. Factory reset did not help, isolating the system from any outside/internet access did not help.
After the test print failed to print in the correct location from the flash drive, I went to the Move Axis, and tested the range of motion for all three directions. X and Z had full range of motion, but Y was offset towards the front by half the plate. I could only move the head halfway back with the knob.
I looked around the menus and reran the Auto Home. After that I had the full range of motion available on all three axis.
I started the test print and saw it probing all 20 locations in preparation for printing. It cleaned and purged the nozzle them went to the wrong location to print again.
I aborted the print, then went back to the move axis menu and both X and Y had lost their calibration. Using the knob they would hit their limits around the middle of the build plate. I ran Auto Home again and it went back to full range.
It appears that just before the print when it does a quick test of the font and right edge it throws the positioning off by about half of the build plate
Had the same problem. After hours in chat with tech support and no solution to the problem, I took it apart and found I need to remove 2 screws that were getting in the way. One on each side. It was the right size screw. It just seems like a design flaw or something.
I tried loosening then removing those screws after looking at the assembly guide to see what they did. Watching the homing process for the 100th time (not sure if that an exaggeration or not now), I got to thinking about the print we forced during the support chat. It kept layer shifting to the right and front. Each time was almost 1/4 to 1/2 of an inch. I played with the motors each one moves the extruder diagonally and that shift could be caused by a single motor.
I already had some of the metal off the sides to give me better access and started looking at the motors and the pullies for the belts. I noticed the X Motor (rear left) pully looked a little off. The set screw on the flat side was not centered. I tried to tighten it and it moved slightly. I then loosened it, centered it on the flat side, retightened both screws and made sure the ones on the other side were tight too.
After retightening the belts and testing it passed. I am on my 3rd print now with no errors or shifts. I'll run several more then put the panels all back on
RE: Printing in the front right corner and then goes nuts
The set screw on the motor pully was the problem. I have been printing for 12 hours without a single issue.