tag:blogger.com,1999:blog-3615478772815290200.post7228520286631978263..comments2024-02-21T19:57:00.859+01:00Comments on 3D printer improvements: Tribed: a fully automatic bed leveling and tool height adjustment, with FSR and 3 Z screwsJeremie Francoishttp://www.blogger.com/profile/02984201174566394892noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3615478772815290200.post-45447905495936091152019-10-02T14:27:41.043+02:002019-10-02T14:27:41.043+02:00Update 20191002!
To be frank, I would probably no...Update 20191002!<br /><br />To be frank, I would probably no more recommend the burden to implement this solution unless you like to tinker of course.<br /><br />If you design a new printer from scratch, better go with a super sturdy frame that will not distort with time or stress, e.g. by using super thick smooth Z rods, and very long linear bearings for the bed. It is still possible to link 3 Z axes (e.g. by means of a belt underside, or 3 steppers). Modern software compensation with head-mounted sensors is pretty reliable nowadays. They do not produce visible artifacts, if (and only if) the sensor and printing surface are well matched (which is not always the case).<br /><br />E.g. modern 3D printers like the UM3 (I have one as well) are workhorses that "just work". After not trusting it fully, I admit I ended up leaving the "autolevel" on and I have yet to see a problem. It does this by detecting the sudden flattening of the capacitive sensor signal when the nozzle ends up hitting the bed and stays at a constant distance while the bed is kept moving up a bit further -- something that could easily be duplicated in another setup, and that probably was somehwere else (not worth a patent imho).<br /><br />The main advantages left with a 3-point bed leveling system IMO is to prevent any freeplay in the bed at all because it brings 2 additional Z axes by definition... It also helps to make ultra-light heads, while improving visibility/printable surface (by not having such sensors on the head).<br /><br />My main complaint about reliable printers like the UM3 (beyond the outrageous price!) is that it is incredibly slow. They have such a massive head to move around, with the additional burden that one just cannot see what it is printing (=it is impossible to fine tune the flow in real time). It also waste a really significant surface because of the dual head setup (nothing to do with the sensor actually here). In this respect, I would better buy an E3D tool-changer nowadays, or even a BCN3D: no need to drag an unused head everywhere, for the few jobs that require dual extrusions in my case. Both of them have very sturdy frames and rails, and once finely tuned, bed leveling is probably something to forget about.<br />Jeremie Francoishttps://www.blogger.com/profile/02984201174566394892noreply@blogger.com