Re: Spring sheet lifting during print !
yea its not worth to make/ship enclosures, if you are having the money for a prusa and the inclination to own a printer, you are diy your enclosure for <30$ from ikea/plastic bins/Thermasheath
True but it really depends on what the enclosure entails, Ikea tables are cheap but like most Ikea stuff, they suck in quality and not everyone prefers them. And of course, nothing beats a cardboard box but still, not everyone prefers that. I still think there is a market for something official and decent, not to mention a little more thought than just covering the printer. Ambient temperature, sensors, designed around electronics, filters, lots of possibilities to make it more then just a box.
Re: Spring sheet lifting during print !
Possibilities to make it more then just a box.
Hell, one of those collapsible canvas laundry hampers with a plastic window on one side would be a great cheap enclosure upgrade to the cardboard box 😉
Re: Spring sheet lifting during print !
I was wondering how foam board would work for an enclosure? Cheap, easy to construct, and easy to store if you made it fold-up.
Re: Spring sheet lifting during print !
I was wondering how foam board would work for an enclosure? Cheap, easy to construct, and easy to store if you made it fold-up.
Might insulate it too well. If it gets hotter than 38C in there print quality will suffer.
Re: Spring sheet lifting during print !
Has anyone tried binder clips mine is lifting too on the spitfire mk xv1 wing print...
Re: Spring sheet lifting during print !
Jesus, this is disappointing.... i guess it wasn't tested on large prints.... 😮
Re: Spring sheet lifting during print !
i use a 1mm galvanized steel sheet with a PEI foil for large prints.
Re: Spring sheet lifting during print !
I just had an idea I'm gonna print some slotted clips to go on the corners so it doesn't lift 🙂
Re: Spring sheet lifting during print !
i think if the pulling force is to strong, nothing would prevent a deformation of the print surface.... even if there was a stronger bond between sheet and heatbed. at least the heatbed (pcb) itself would bend as well.
@maximilian.r: ok, if you use an additional solid steel plate (1mm or even thicker), you can obviously withstand higher pulling forces.
and with the design of the MK3, this should be a decent solution.
dem inscheniör is' nix zu schwör...
Re: Spring sheet lifting during print !
i think if the pulling force is to strong, nothing would prevent a deformation of the print surface.... even if there was a stronger bond between sheet and heatbed. at least the heatbed (pcb) itself would bend as well.
@maximilian.r: ok, if you use an additional solid steel plate (1mm or even thicker), you can obviously withstand higher pulling forces.
and with the design of the MK3, this should be a decent solution.
i also have a 1.5 mm steel sheet but thats overkill. The issue is now more with the PEI sheet lifting from the steel.
i think a 1.5mm spring steel with PEI powder coat would be a perfect solution, maybe Prusa could this as an option... 😉
Re: Spring sheet lifting during print !
yeah, that would be cool. the design of the MK52 is explicitly to allow an easy change of the print surface. such a powder coated "monster" steel sheet, provided by prusa, really would be nice.
....I think a 1.5mm spring steel with PEI powder coat would be a perfect solution, maybe Prusa could this as an option... 😉
of course such an additional heat capacity needs to be compensated with a new, proper PID calibration for the heatbed.... otherwise you would end up in severe oscillations of temperature.
dem inscheniör is' nix zu schwör...
Re: Spring sheet lifting during print !
Just thinking loud... maybe increasing bed temperature would help? In any way instructions for bed temp says bigger model bigger ber temp.
Re: Spring sheet lifting during print !
...
of course such an additional heat capacity needs to be compensated with a new, proper PID calibration for the heatbed.... otherwise you would end up in severe oscillations of temperature.
I think thats not really an issue, the system has more "thermal inertia" but the senor measures the temperature at the bed and not the surface of the steel. So i think you will end up with a sligthly less temperature on the surface.
I didn't see temperature fluctations / oscillations with the 1mm galvanized steel plate.
Personally i think the bed temp is not that critical, my PrinterBot (which i owned before my MK2 & MK3) had a relay for the heatbed with 5 °C oscillations and worked ok
But i have to adjust the Live Z Value as galvanized steel has different magnetic properties than spring steel 🙄
So an Live Z offset in the slicer wolud be great ! maybe as a preset like filament & Printer type.....
Re: Spring sheet lifting during print !
On the other hand a pid calibration is easy to do and doesn't take long, so why not do it just to be sure?
Re: Spring sheet lifting during print !
2 Reasons:
1. I am lazy .... 😉
2. i switch between thin and thick sheets. And doing a PID after each change... see 1.
Why do i switch between sheets ? the 1mm plate is galvanized steel, not spring steel, so it is not so flexible, which is ok for big parts but not so nice for smaller stuff.
Re: Spring sheet lifting during print !
So an Live Z offset in the slicer wolud be great ! maybe as a preset like filament & Printer type.....
Isn't that already in Slic3r? Under "Printer settings" --> Z offset. Just make two printers there and different z offset for each.
Re: Spring sheet lifting during print !
So an Live Z offset in the slicer wolud be great ! maybe as a preset like filament & Printer type.....
Isn't that already in Slic3r? Under "Printer settings" --> Z offset. Just make two printers there and different z offset for each.
Uuups...... never saw that, thanks. 😳 😳
EDIT: that could also work as a solution for the different PID settings
Re: Spring sheet lifting during print !
That could also work as a solution for the different PID settings
Sorry off topic but confirming. So, let me get this straight.
Corrections?
MK2S kit owner since 8/15/2017
Re: Spring sheet lifting during print !
Sounds ok...
BTW: no PID tuning necessary for the thicker steel sheet. i do not see any fluctuations.
Re: Spring sheet lifting during print !
Out of curiosity as I don't have a MK3 yet, how thick is the spring steel plate? Thinking of maybe modifying one of my old printer to use such a plate if I can find one and glue a PEI sheet to it.