EL34's CNC P11

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CNC bird feeders The regular daily bird crowd: I get mostly smaller birds like Gold finches, Chickadees, Tufted tit mice and Nuthatches at my feeder. Once in a while I get a pair of Cardinals. Two times a year, on the yearly migration route, I get some Grosbeaks and a couple other cool looking birds like Indigo buntings. Every night I get flying squirrels on the feeders which are really fun to watch. I decided to re-do my feeders after a renegade gray squirrel got past my anti-squirrel device. The squirrel then proceeded to chew the plastic base off the feeders so he could get to the seed. The seed wasn't staying in the feeder very well any more. Time to make new feeder bases! Below is a Cnc'd base to a bird feeder. The material is HDPE cutting board material. It was cut from a 12" x 18" x .5" thick piece of HDPE. The HDPE machined like a dream. I have never cut a material that cut so cleanly. I used a .25" carbide endmill on my rotozip spindle. The Rotozip was spinning at full speed, around 30,00 rpm. There was zero melting of the HDPE, as it was cut, which is something you always get with plastics. The cutting chips were very small, silky feeling plastic chips. It almost feels like Teflon when you pick up a handful of chips. Here is a link to US plastics, where I purchased the HDPE - US Plastics Link
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The four center pieces are .5" round standoffs that I left as part of the HDPE material. The lid sits on the standoffs. I added drain holes in case rain water gets past the overhead roof. The birds sit on the outer perch ring which is 1.5" away from the outer jar lid. 1.5" seems to be the right distance for a small bird perch.	The seed jar is a one gallon plastic Rubbermaid jar that I bought at Wal-Mart for about $3. The lid of the jar is machined so that the seed can fall through and come out around the outside of the jar lid. The four jar lid mounting points are screwed into the four HDPE standoffs seen in the center of the machined piece.
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Here's the feeder loaded with black oil sunflower seeds, which seems to be the birds favorite food. I added stainless ring bolts to the top of the jars. There is 2" diameter aluminum washer on the inside of the jar to keep the bolt from pulling through the plastic jar.	Here's both feeders mounted under a cedar canopy shelter. The birds have their own picnic shelter, which they like, because they don't have to keep watch overhead for predators. The overhead shelter also keeps the rain out of the feeders and the birds just sit under it when the weather is nasty. It is hanging off one of my decks, about 15 feet in the air and 8 feet out past the railing of the deck. The L shaped mounting pole swings in over the deck so I can fill the feeders. There is a big dome shaped metal lid around the vertical pole so that squirrels cannot get to the feeder.
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CNC bird feeders