This is not made yet, but the start of a build log for a laser engraver. Rather than getting off tangent too much from LowRider-inspired Foam Ripper , I am starting a new topic here. I am initially starting with Mike’s design as shown in the thread message above, but who knows what it will end up looking like. Mike’s design is mentioned in that thread & included here also for easier reference: located: https://www.modelflying.co.uk/forums/postings.asp?th=147510
The end plates I will probably end up using 250mm lengths of 2060 or 2080’s, but have assembled all the parts from the original build as a starting point. I did find a couple of dimensions for the wheel holes so far that were not consistent in the bottom & top frame, so I adjusted them. They were about .5mm off of being parallel with the V-slot. I was originally thinking of using eccentric spacers for the main beam, but that would require 4. Mike pointed out in the other thread that the eccentrics might take that cantilever out of square. If they are adjusted equally & check square while adjusting, should be able to use them. After fitting Mike’s wheel adjustment 3d parts I am kind of like that method. I also plan to use the low profile screws from openbuilds instead of the flat head screws, so I adjusted the countersunk holes as needed. I assembled the parts in fusion 360 using the .123dx files from Mike’s design, a 5500mw laser model from grabcad (https://grabcad.com/library/laser-diode-5500mw-1) & a limit switch from grabcad (https://grabcad.com/library/limit-switch-10t85-gsfy-10-1). The 2040 is 500mm length & the 2020 is 360mm in length in this design. That should give me at least 400x200mm or more of burning room. I am currently planning to use a 6 watt diode laser with this design.