[Pi IoT] - Remote Horse Feeder System Post Challenge : Fun with Acrylic

RE: [Pi IoT] - Remote Horse Feeder System Post Challenge : Fun with Acrylic

mcb1 — Mon, 12 Sep 2016 09:51:06 GMT

Hand drilling acrylic will usually end up with problems uless you use the proper drill bits.

You have much better luck with a drill stand, but the piece needs to be clamped down, otherwise it climbs the drill and then breaks out.

There are a few other plastics glues on the market.

I found one that used a pen which added a primer, and then the glue to produce a clean joint.

There is nothing like using the proper acrylic solvent, it is magic and bonds the two pieces together.

Mark

RE: [Pi IoT] - Remote Horse Feeder System Post Challenge : Fun with Acrylic

Robert Peter Oakes — Wed, 07 Sep 2016 12:45:13 GMT

First of all, it is perfectly ok to keep on blogging about your project until completion. E14 can see when the various posts are made so it should not be an issue and also everyone would be keen to see how it ends, even thought the challenge is done

When cutting acrylic the reason your getting cracks / breakages is because the rake on your drill is wrong. Yur probably using a metal drill (The most common) and it has a relatively steep rake and will "Snatch" the plastic, especially as it breaks through the bottom.

You need to either re-grind the bit to the correct rake or buy a bit specifically for acrylic. An alternative would be to use a STEP drill, they tend to have a shallower rake and may give better results.

I found this, it will help explain how to grind your drill bit if you are able, or at least explain in more detail

Drilling and Proper Handling and Maintenance of Acrylic Sheet: Plastic Distributor & Fabricator

RE: [Pi IoT] - Remote Horse Feeder System Post Challenge : Fun with Acrylic

balearicdynamics — Wed, 07 Sep 2016 08:26:36 GMT

Interesting post on acrylic...

If I can suggest something, derived by some complex acrylic works with the mill machine and drilling, the most important thing is not just to make progressive larger holes - that is also useful but rime consuming - but the shaft rotation speed. Acrylic tends to become hot almost faster than any other material and then break. What should be done is to find a shaft rotation so slow that you see the parts of acrylic powdering and not fusing.

Enrico

RE: [Pi IoT] - Remote Horse Feeder System Post Challenge : Fun with Acrylic

fvan — Wed, 07 Sep 2016 08:21:08 GMT

I'm doing the same thing, adding "post-challenge" in the title as a clear identifier ([Pi IoT] Alarm Clock #23: Notifications (Post-Challenge) )

In fact, I think it's great you continue working on it, even after the challenge [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-9661ccf5-e628-417a-aea7-cc0b67265a46/4555.contentimage_5F00_1.png:16:16]