I have to admit I'd be tempted to go really basic. Bend a piece of strip
steel into a L shape. Drill a 10mm hole in one leg for one of the
mounting bolts to go through. Mount two slotted sensors such as these
<https://www.ebay.co.uk/itm/201613548203?epid=1293723330> on another
piece of steel. Hold everything in place temporarily and tack the two
steel pieces together.
You need to be a bit careful to ensure the sensors are spaced correctly.
When one is looking at the edge of a tooth the other needs to be looking
at the centre of a gap or the centre of a tooth.
Les
On 29/06/2021 22:31, John Dammeyer wrote:
I often have trouble coming up with simple solutions.
Attached the photo of my encoder disk made from aluminium so slotted or reflective sensors would be required. My first idea of a clamp around the casting to hold the sensors really didn't work out.
The bolts holding the upper casting down are 10x1.5-35mm bolts and there's a flat machined area in the casting for the lock washer and bolt head. It's really hard to determine exactly what the bolt circle is but a guess of 120mm between bolts creates roughly 84.8 radius circle.
What if I turned out two spacers? Clamped them in place and then welded a bracket to them. Or even just a curved piece with much larger holes clamped down to allow some tweaking for fit. Then maybe spot weld in place with final welding off the machine.
Then on this plate mounted the sensors.
Good idea? Or also doomed to failure?
Thanks
John Dammeyer
"ELS! Nothing else works as well for your Lathe"
Automation Artisans Inc.
www dot autoartisans dot com
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