The angle iron would only provide a base for mounting the sensors. The
vertical part could be used for cable clamps, so that the cables are
directed down (relative to the position in the picture), not radially.
The sensors would be positioned in an arc, of course, not aligned to the
straight edge.
Since you already have the CNC mill working, making the arc/crescent
shape (your original design) out of say 2 mm sheet metal would not be a
problem.
But I would not bother welding the parts, I don't see any benefit to that.
As for ease of positioning the thing, I'd make the inner edge of the
metal say 1 mm larger radius than the wheel. At assembly I'd use a piece
of 1 mm thick flexible plastic (with slots for the sensors if needed)
between them, keep it pressed, tighten the bolts. Any play (in the ends,
around the bolts) would arrange in an angular offset, which is irrelevant.
On 6/30/2021 09:56, John Dammeyer wrote:
From: Cristian Bontas [mailto:[email protected]]
Hi
I'd go for something similar to the picture, but simpler.
Make the two cylinders and use a piece of angle iron for the sensor support.
Two holes for the bolts to go through. Offset so that the side of the
angle that is parallel to the shaft (and the bolts) clears the outside
of the round casting. Grind/cut from the middle of the other side of the
iron to clear said casting. Or make the cylinders the right height so
that the side of the angle iron fits between the flange (on top of the
casting) and the disc.
On 6/30/2021 00:31, John Dammeyer wrote:
I often have trouble coming up with simple solutions.
Thanks Christian,
Making the two cylinders is pretty easy. The only problem with the straight
angle is that the sensors have to be mounted in an arc around the disk. Since
I have the CNC mill, cutting out the top section with the right profile
wouldn't be hard. I also have a 3:1 shear/brake/roller and a heavier duty ring
roller so I could in effect make my own angle iron but curved after the bending
and welding.
In fact a friend suggested I model the whole thing with the 3D printer. The
attached photo is what I did for my Gingery Lathe but time constraints mean
it's still at that point where the BeagleBone, Machinekit and the Xylotex Cape
are back in the kennel. As yet haven't had a chance to get to the point where
it's all working.
John
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