Thanks Les, You can't quite see it in the photo but there's even an arc slot inward a tad to serve as the index. So a total of 3 slotted sensors are sitting on my desk. This was the overly complex plan A. When the drawing is rotated you can actually see the sensors are offset so one looks at the tooth and one at the slot between.
> -----Original Message----- > From: Les Newell [mailto:les.new...@fastmail.co.uk] > Sent: June-29-21 3:00 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Mounting spindle sensors. > > 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> > 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 > > > > > > > > > > _______________________________________________ > > Emc-users mailing list > > <mailto:Emc-users@lists.sourceforge.net> Emc-users@lists.sourceforge.net > > <https://lists.sourceforge.net/lists/listinfo/emc-users> > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > <mailto:Emc-users@lists.sourceforge.net> Emc-users@lists.sourceforge.net > <https://lists.sourceforge.net/lists/listinfo/emc-users> > https://lists.sourceforge.net/lists/listinfo/emc-users
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