{"data":{"model":{"id":"140093","slug":"snap-together-manual-z-axis-for-cheap-laser-engrav","name":"Snap-together Manual Z-axis for cheap laser engravers ","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"5.0000000000","myRating":null,"ratingCount":1,"description":"\n\n\n

Snap-together version of https://www.thingiverse.com/thing:5233648. Slight internal structural differences to accommodate other mounting options but otherwise much the same. Fits directly on Fokoos and Eleksmaker A3 laser machines. Accepts Neje laser modules directly and others with easily modified adapter plate. It will bind up if heavy-handed with the laser module M3 clamp screws... make them just snug enough to keep module in place, no more.

Please know that this is not the smoothest operating mechanism there is\u2026 but, in this case, it helps keep the laser at a constant height without a locking mechanism. My earlier version(s), with rods and bearings, could actually fall under their own weight at inopportune times. But it is \u201csmooth enough\u201d to allow easy and relatively precise height adjustment for focusing, etc. It has right at 9 complete turns of top to bottom adjustment\u2026 a range of 75mm total travel on the slide; i.e. about 8mm per turn of the knob.

And, again, as this Z-lift isn\u2019t for continuous, high-speed operation and heavy loads, this is a case IMO where printed slides and threads make sense. As long as it doesn\u2019t melt or get broken by a \u201cheavy-handed\u201d gorilla\u2026 maybe it\u2019ll last as long as the machine it get installed on? Only time will tell\u2026

Print Settings

Printer Brand:

Prusa

Printer: \n

I3 MK3S

Rafts:

Supports: \n

Yes

Resolution:

0.3mm / 0.2mm

Filament:

\n\n Sunlu PLA \n

Notes:

Support required is minimal... from the build plate only. Recently I've also started printing with a ridiculous number of perimeters (6!)... on the recommendation of various prominent YT'ers. Doesn't seem to hurt.

\nAn observation about printed sliding surfaces\u2026 it helps if the mating surfaces are NOT printed at the same resolution and with layer lines running in the same direction. To test I printed two sliding mechanisms\u2026printed vertically-oriented, the set hardly slides at all without considerable force applied, printed horizontally-oriented, that set slides better but feels a bit \u201csticky\u201d\u2026 but mismatch either set and it is \u201cjust right\u201d.\n

For the \u201cthreaded\u201d parts \u2013 the leadscrew and carriage \u2013 I felt both needed to be printed oriented vertically to insure their cross-section is as round as possible. In this case, I found that if I printed one at 0.3mm layer height and the other at 0.2mm to \u201cmismatch\u201d the layers\u2026 I got smoother operating threads than if both were printed at the same resolution.

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