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- Feb 1, 2015
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I saw that as well and it was an inspiration for my design. My concern with that was that I would have the push rod to contend with. I decided to use a solenoid instead. Instead of a direct release, the solenoid releases a seer, much like the triggering mechanism on a firearm or crossbow. That way, a relatively weak solenoid can release a fairly strong spring for a crisp action of the half nut lever. The design also allows manual use of the half nut lever.Nice work Greg!
I saw a really neat solution on here a while back which used a spring loaded lever that was triggered by a push rod mounted to the lathe bed. Seemed very repeatible and robust.
Here is a preliminary view of the mechanism shown in a cocked position. Activating the solenoid will pull down the lever, releasing the sear which will allow the bolt to move to the left, thereby releasing the half nuts. It is cocked by rotating the half nut lever clockwise which will simultaneously engage the half nuts an move the bolt to the right which will reset the seer. There are a still few parts missing from the design.