Stuttering on perimeters
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Here is a pastebin of 3 different M122 calls. One while it was doing infill, one while it wasn't doing a stutter, and one as close to the stutter as I could manage.
It is in the order of:
Top - Stutter
Middle - No Stutter
Bottom - Infill -
Are you printing from SD card, or via USB? If via USB, what program are you using on the PC to send the gcode?
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Printing via SD card I'd believe. I log into the web interface, upload a gcode file, hit 'print'.
Also, I'd like to say that this is probably the ONLY forum I've ever been on, when the actual people who developed and work on the things the forum is about, are actually always around and generally seen in every thread lol. Its rather awesome to see!
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you just described my problem to a t! i have retract of 15mm and am seeing a jamming issue from the blob on end of filament not going back in… ugh hopefully this topic will fix both our issues LOL i have tried cura, slic3r and prusa slicers all same result. been watching that pressure advance topic too, very interesting and i am guessing the future of 3d printing...
15mm is an awful lot. How long are you Bowden tubes. What can happen when you have that much retraction is that you draw hot molten filament up past the heat break where it solidifies ad causes a blockage.
Thank you Sir! I am still a bit of a newbie. (FT5 with duet wifi) bowden is about 1.5 feet but goes through enclosure as extruder is outside. It has slack in it so it is not straitened out at max x or y movement (now thinking i should shorten it up a bit)I am seeing a great deal of wear on the ptfe tube where it connected to the e3d hot end. When jams occur i am seeing filament about 1 inch past end of bowden tube when i pull it out of the print head. It appears to be pushing bowden slowly out of retainer. after running a long print, tube will have bite marks from retainer digging into it. that may be because of the blob on the end of the filament so you are certainly on to something!
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forgot to add all metal hotend no ptfe tube inside
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you just described my problem to a t! i have retract of 15mm and am seeing a jamming issue from the blob on end of filament not going back in… ugh hopefully this topic will fix both our issues LOL i have tried cura, slic3r and prusa slicers all same result. been watching that pressure advance topic too, very interesting and i am guessing the future of 3d printing...
15mm is an awful lot. How long are you Bowden tubes. What can happen when you have that much retraction is that you draw hot molten filament up past the heat break where it solidifies ad causes a blockage.
Thank you Sir! I am still a bit of a newbie. (FT5 with duet wifi) bowden is about 1.5 feet but goes through enclosure as extruder is outside. It has slack in it so it is not straitened out at max x or y movement (now thinking i should shorten it up a bit)I am seeing a great deal of wear on the ptfe tube where it connected to the e3d hot end. When jams occur i am seeing filament about 1 inch past end of bowden tube when i pull it out of the print head. It appears to be pushing bowden slowly out of retainer. after running a long print, tube will have bite marks from retainer digging into it. that may be because of the blob on the end of the filament so you are certainly on to something!
Yea, you're retracting WAY too much. Try 5-6mm. 15mm is pulling it completely out of the nozzle and into the 'wider' section of the throat, where it then solidifies into a larger piece and wont ever go back in. And yes, this will cause the tube to be forced out of the retainer if your stepper motor's amperage is too high.
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OP. What sort of printer is it? By that I mean is it Cartesian, CoreXY, Delta? Does the pausing on perimeters happen in the X direction, the Y direction or both? From your diagnostic reports, the supply voltage looked a little low, dropping to 10.9v. It's not triggering any under voltage events but I'm wondering if it might be cause a stepper to stall? DC42 will know if that's a possible cause better than me.
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I do know that my powersupply is complete garbage. It is supposed to be 12V but when idle it'll be around 18V and then drop as low as 10V when any sort of current is pulled through it… its been a pain to work with... adjusting the pot on it doesn't even change the voltage like it should... But it has been 'working' for nearly 2 years now, and havent' felt the need to really replace it since it's been performing (although just barely). Been thinking about getting a switchable powersupply (as in, one that can be turned on and off by the duet instead of staying 'on' all the time. any decent suggestions?
Also, it is Cartesian. It is a self made Prusa i3 MK2 style.
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any of the "certified" pc power supplies are more than good enough, and some even do power filtering which is huge for DC stuff! you can buy an atx adapter if you don't want to do any wiring on the PS unit for remote on. I believe Aux power on off can be used to turn on 2nd power supply from duet wifi but have not tried it. it is mentioned in another thread if you search, i think m80 or 81 for on off…
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any of the "certified" pc power supplies are more than good enough, and some even do power filtering which is huge for DC stuff! you can buy an atx adapter if you don't want to do any wiring on the PS unit for remote on. I believe Aux power on off can be used to turn on 2nd power supply from duet wifi but have not tried it. it is mentioned in another thread if you search, i think m80 or 81 for on off…
Yea I'm going to have to give it a look once I can get some more money going. Sadly, I don't make all that much lol. Maybe $280 every two weeks. So as you can imagine, buying a Duet WiFi is literally over half my paycheck… So I'll give things a look around to see if I can find something. I've always liked the ability of using a ATX power supply from computers (its what I used to power on the printer during the first few months of it being 'alive', but it took two of them, one for the board and hot end, and one just for the heated bed... they were powersupplies from the mid 90s lol), so I've been thinking about trying out the whole 'server power supply' idea. I have a few lying around that came as extras with a HP Proliant server and Dell Poweredge server. Just haven't really been too keen on opening one up because I know they can handle alot of power and sometimes really high voltages...
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I had this same problem! My print head was visibly stuttering during perimeters where one perimeter pass would end and the next concentric perimeter pass would start. The issue was my jerk speed was too low. For some reason, M566 in the config.g file for jerk or instantaneous speed change is in units of mm/min rather than mm/sec, so you have to be cognizant of that when you dial in your settings. I just stepped mine up to 2400 mm/min (40 mm/sec) and now my perimeters are printing beauteously, and not leaving an obvious bump where the part's seam is.
I really hope this solves your problem. It solved it for me!
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I had this same problem! My print head was visibly stuttering during perimeters where one perimeter pass would end and the next concentric perimeter pass would start. The issue was my jerk speed was too low. For some reason, M566 in the config.g file for jerk or instantaneous speed change is in units of mm/min rather than mm/sec, so you have to be cognizant of that when you dial in your settings. I just stepped mine up to 2400 mm/min (40 mm/sec) and now my perimeters are printing beauteously, and not leaving an obvious bump where the part's seam is.
I really hope this solves your problem. It solved it for me!
I don't know if you'll see this, but THANK YOU! This turned out to be exactly my problem.
