Finishing Up The LR32 Adapter Plate + Test Run
This is going to be a long post.
After some "successful" prints, my extruder started clicking again. Seemed like another clog. So I opened it up once more.
It did seem like the Bowden fitting on top of the heat sink was not that tight.
@mikev12345 I re-did the Hatfield fix using CHEP's method of measuring the tube section. And this time I put some Loctite Blue 242 Threadlocker on the Bowden fitting. Seems to be ok so far.
Back to the LR32 adapter plate design. The plate is good to go. But I needed a way to fasten it to the Festool sled. I could have just gotten some M6 wingnuts from the hardware store, but I wanted to try designing some knobs in Fusion 360. This is what I came up with:
Due to the nature of the threaded posts on the sled, and the height of my router base, I needed a specific clearance, and the hex nut that goes inside had to be quite low.
It printed ok. I'm getting blobs where a layer is started or stopped. They completely match up with the z-seam alignment in Cura (set to random). I haven't had time to do a bunch of tests again, but I'm thinking either over-extrusion, or not enough retraction.
The last thing I designed is a "pin lock", which I got the idea from someone on Festool Owner's Group forums. Basically it's a spacer that locks the indexing pin "up", so the sled can slide freely back and forth and not index the 32mm holes on the guide rail. Could be useful for non-32mm operations, like cutting slots or dados.
This could have easily been plywood, but again, trying to practice Fusion 360 and it looks nicer.
Using The Jig
The following isn't a tutorial or anything, but should give you an idea of how my pieces work and what's involved in setting up the LR32 system, as well as a mini-review and accuracy test.
First I attach my 3D-printed baseplate to the router, with the screws that came with it.
Next I had to calibrate the router sled to the guide rail, by tightening a screw on either side so there is no play.
Then the router + adapter plate slides on the LR32 sled with the two M6 threaded studs going through the holes on the adapter plate.
I intentionally left these oversized, so the whole thing can be centered. Speaking of that, here is the 40mm centering mandrel that comes with the sled kit:
This gets plunged through the center hole in the sled, ensuring the router spindle is perfectly centered with the sled. And then it is tightened down (with my 3D-printed knobs).
Then the router motor can be removed from the plunge base, and the centering mandrel is swapped for a 5mm brad point boring bit. And the drilling depth is set on the plunge base turret.
To configure the guide rail, there are two "end stops", that align the row of holes a certain distance from the edge of the cabinet gable. Options for 32mm, 16mm, and 9.5mm. I picked 32mm.
I did not purchase the "front stops", which set back the row of holes the appropriate amount from the edge of the cabinet (usually 37mm). Instead I am using a Paolini Pocket Rule to push the rail back. I figure I'll use it for lots of stuff, but this is one of the reasons I got it.
Then the rail should be clamped down on either side, from underneath.
Which results in this kind of goofy, diagonal, hanging-off-the-edge-of-the-MFT setup.
Front row of holes drilled:
Flip the cabinet slab around and drill the back row of holes.
Time for some accuracy checks.
I couldn't get my caliper to lock in on the exact values of 32.00mm and 37.00mm, but you get the idea. As far as I can tell... perfect.
My thoughts:
— set up is not that bad, I feel like it would take me 10min, totally worth it to batch out a bunch of shelf pins
— accuracy is dead on
— it's everything I loved about my homemade jig (fast, tight tearout-free holes, perfect dust collection with the router), but accurate and repeatable
— the 3D-printed parts work well, and look fairly "OEM"
— this was by no means a cheap solution (having to buy the guide rail was a bit of a tough pill to swallow as a hobbyist), but I'm planning on a good amount of future cabinets for the house so I think it will be worth it. If you for some reason already have the holey rail, this "essentials kit" and using a non-Festool router is actually not that bad of a proposition I think
For kicks here's a pic of the "pin lock"
Hopefully this was mildly interesting to someone
