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THF/Tine Weeder Log.md

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+# 30NOV2024
+
+tines - 11 pounds to travel 9 inches
+effective lever arm approx 15 inches
+let's just say a tine worst case is 20 pounds
+
+![[Pasted image 20241130114206.png]]
+
+Yeah, I think 5/8 rod is the right call
+
+pressure on .12" plate = 20 lb / ((.625) x (.125)) = 256 psi
+
+But snap in bushings would be better
+https://www.menards.com/main/hardware/fasteners-connectors/specialty-fasteners/bushings/midwest-fastener-reg-5-8-id-regular-3-4-od-hole-snap-bushing-15-count/66402/p-1444439917699-c-9547.htm
+https://www.menards.com/main/electrical/conduit-conduit-fittings-raceways/conduit-fittings-supports/sigma-proconnex-trade-snap-in-bushing/49392/p-1444430928210-c-9538.htm?exp=false
+
+
+current design
+- 1.5 to 7.5" gap in 1" increments
+- outer tines are spaced 13.9" when fully spread, 7.9" when fully brought in
+- any guides for formed parts w.r.t. bend radii, etc.?