Silicone bed leveling mod for MK4S Debate
I have 3 Prusa's ranging from MK3S, 3.5S and 4S. Happy with all the printers.. My 4S however produces 0.7mm variance compared to my other printers which have about 0.2mm or smaller. The 4S uses the fixed magic metal boxes Mr Prusa likes to call them which is supposed to allow heat expansion over temperature to keep a uniform first layer calibration. One of my printers is a 3.5S which has the metal magic boxes on the bed and did a variance check using octoprint bed visualizer cold and over temp. The bed variance doubled with this scenario. However, using my silicone mod on the 3S and the 4S I noticed only a 5% increase vs a 100% change using the metal box standoffs.
Anyway, just curious if anyone played with this..
Prusa is my hero btw and always will be.. No other company matches their support, quality of products and upgradable paths for prior printers. All other 3d printer company's just make them obsolete and stop supporting them. Hats off to you guys...
RE: Silicone bed leveling mod for MK4S Debate
I have tried it. I couldn't notice any difference in terms of print quality, in relation to the heat expansion issue try changing your Z-offset in the slicer by 0.004mm (this is what I have set for my satin sheet by ymmv), this should eliminate the rippling issue that seems to be going around with the printers that have the loadcell equipped.
RE: Silicone bed leveling mod for MK4S Debate
So you did the silicone mod also on the MK4S? I have been concerned that the springiness of the silicone spacers might mess with the algorithm used to process loadcell data into proper measurements. I did the mod also, and in Octoprint Bed Level Visualizer I saw a huge improvement. However, if the mod messes with load cell measurement, then I am concerned that the visualizer map cannot actually be trusted. Perhaps I tuned the bed very well to something that is not flat in the real world.
Did you do careful first-layer tests before and after the mod? I didn't, and I would have like to see if there was indeed improvement, or at least no harm.
RE: Silicone bed leveling mod for MK4S Debate
There is an original publication is on this forum.
The title is:Bed Levelling Mod & bed level calibration guide (for Beginners also)
The author is:
christianback
I try to provide the link here:
https: // forum . prusa3d . com / forum / original-prusa-i3-mk3s-mk3-improvements-archive/bed-levelling-mod-bed-level-calibration-guide-for-beginners-also / ?You please need to remove all the spaces I added in order not to run into any filtering system.
My ask is, if anybody here does expect or know, if this modification with the springs will be as well working on MK4S.
The Nyloc mod as well as the silicone mod obviously does work with MK4S.
Btw: I do have the spring-based modification successfully running on my MK3S.
My personal expectation is, that it should work, but I wanted to fetch opinions and knowledge here.
RE: Silicone bed leveling mod for MK4S Debate
here the orig link - lets see, if it stays and can be used:
https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-improvements-archive/bed-levelling-mod-bed-level-calibration-guide-for-beginners-also/?