Thread: a perfect 90deg joint - 15mm Alu
As for the use of the part, it will be part of a coffee grinder with these used to crush the beans:
This means there will be mostly clockwise turning forces acting on the mount and the carriage, although I don't know what the torque is yet.
I'm contemplating a similar problem at the moment, so I thought I'd add it in here rather than start a new topic.
Here's a corner joint, with three 15mm plates (Eco Cast, so should be 15mm consistent across):
Idea is to get the edges aligned perfectly and easily. Plates are held using M5 bolts, with 5.5mm through-holes on the plate faces to allow some wiggle room on the edge threaded holes. This must come up quite often in various CNC machine builds, so I'm curious what you normally use.
So far I've got the following solutions on my list:
- pocket cuts to match the plates against each other
- corner jig to align plates, so no further machining
- locating pins
Dead square box is needed, I'm open to any suggestions.
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