I'm trying to get better about taking photos about what I'm doing. I think it adds a little color to the posts and it definitely makes it easier to remember what I did when writing the journal.
A package of replacement bike chain links was purchased in order to shorten the scrap chain. An attempt was made to drill out a link since a chain tool was not available. It proved unsuccessful. A bike shop will be visited and requested to perform the service or a chain tool will be purchased.
Chain links from a hardware store
The hot glue gun element and nozzle mounting issue was addressed. The heating element cavity had a hole and measures slightly larger in diameter than 5/32” since a #8 bolts fits easily. A spare 2 ½” bolt purchased for the servo mounting provided a mounting screw for the nozzle. The diameter of the nozzle is larger than 3/8” in diameter but was drilled with a 3/8” bit. When the nozzle hole is expanded the nozzle should fit against the ¾” aluminum bar snuggly. Heat dissipation through the aluminum may be an issue.
Components for nozzle mounting
The nozzle with a too long bolt
Nozzle and bolt separated
Nozzle and bolt through mounting plate
Profile of nozzle and bolt
Mount aluminum bar to plastic with countersunk bolts from the underside
Clean saw blade and glue to servo
Build circuit and wire
Install in mint tin enclosure
Test + debugRevise documentation