Discussion in 'Project Logs' started by Cheapskate, 25 Jun 2009.
I think its the acrylic. I mean it was free, so whatever...
Some solvents and glues can cause "crazing" on the surface of the material. Test on a small area first!
OK... After a few months of downtime, I'm back at it.
-and I just saw someone added to my tags! DOH!
-I started this one with the grooves.
-Then there were more grooves, then the shapes got cut.
-Next I cut a bevel into the sides of two of the parts. This batch of parts involved 5 code files and 3 bit changes.
-It looks like one of my measurements was off.
-I have all the fan cover parts done.
-Now I have started on the fins. Say bye to Bananaman.
I haven't had a chance to drop a thank you to my sponsors in a while.
I thought you only came for the morbid squirrel humor?
-Just noticed I got tagged again.
-I got the rotozip out to get rid of the excess frame material.
-I cut most of the offending part of with a hacksaw first.
-Then I drum sanded to the lines. This is a two-handed job, but something had to take the pic. This setup can get dicey too. I need to make a bigger base for the router. It wanted to teeter-totter.
-There's one rough-rounded corner that will never draw blood again! HA!
-I could have just cut the oversized part I made earlier down, but I was too lazy to figure out where .242 was on the ruler. I cut a new one.
-The cord will go through this gap and down along the edge of the radiator.
-Here's more evidence that I've become dependent on the mill. Instead of taking a few minutes with a file to square off the inside corners, I spent nearly an hour milling them out.
-Test fit with the fins. This sucker is going to stick WAY out from the back.
-I glued the last side of the fan cover on. -had to polish one side first...
-Someone got me wondering if you could fuse Delrin to itself and plexi. I also tried gluing to that stuff they make fans out of. I'll have the results of that later.
There will be another pause in updates. I have to sand a whole lot of fins.
All hail the cool sponsors!!!
Think fans are made of ABS, should be able to glue it ok.
Nice updates, Cheaps
Lookin' good cheaps .
That plexi array almost looks like glass! What feed rate are you using through it and are you using a single pass or multiple?
@Azayles - I remembered I did this experiment in the past... after it failed. Fans are made out of something similar to delrin. I found out, (again) that you can't fuse it to plexi. Once the acrylic solvent dried, both parts could be separated. The surface of the fan and the delrin were unscathed.
@DJayness - 7 IPM feed rate, 2 IPM plunge rate, about 4000rpm, 32nd of an inch per pass.
For the 3/32 bit I used on the grooves, I slowed down to a 4 IPM feed rate.
Isn't 7 IPM pretty fast?
Cool sponsors hailed....!
not as fast as 9001 IPM.
@Stonedsurd - With a sharp 1/8" 4 flute bit it works well. The bit stays cool and there is no chipping. I slow it down for larger bits like the 3/8" bevel tip. Visually it's insanely slow.
I'm sick of sanding...
-I chopped off a bit of tube for the reservoir. It will be easier for me to work on the design if the materials are laying around, (and in the way.)
-This is a blurry shot of me tapping the HWLabs SR1 radiator out to 8-32. I gave up trying to find metric screws as long as I needed.
-This is the current SU of the res. I plan to have a CCFL running through the middle, and the white tube is supposed to be a spiral cut insert...
-but SU can't handle spirals very well. There's an insanely complex and time-consuming way to do this, but I'm not up for it. I know what shape I need, and I'll likely be working from a flattened .DXF anyway.
-I went through and did inventory of my gasket pile for the reservoir, and got an idea for something Bloo needed. That's right; I went off on another experimental tangent.
-I started putting together a micro-res/filter. This is basically a warm-up for working on GG's res. Here I'm milling the core part. I messed up and assumed the bit was 1/2" deep. It was only 3/8", so I have those nasty melted spots on the drill holes.
-These are stainless steel screens from old sink aerators. I have enough around to keep a stoner in business for years. The bottom of the pocket looks bad because it is right on the fusion area of the two layers, and it only had 12 hours to cure.
-After I milled the base part, I quickly cleaned up the hole with Comet a bit of felt. This was another part of the experiment. I wanted to see if I could mount a barb in 1/8" of material.
-I glued the two parts together.
-The gasket cutting experiment had a failure. The bit was mostly tearing its way through the rubber. It caught on the loose edge and peeled the gasket free. The holes bored out nicely, though.
-The second try worked much better. I used a harder sheet, and made shure there was plenty of extra material. The 'burr' came off with some sandpaper. I was tempted to try to use it as an eraser.
-I got a little rough installing the screens, and I ruined one of them. So I had to dig out a 'new' one. I picked out one with the least rust to clean up.
-Sanded and polished.
-OK for a speed job.
-I should change out that ugly red for some black gasket stuff some day.
So now I have a handy filter for getting junk out of new loops. I should get back to sanding.
Maybe I'll do something else instead. I'm sick of sanding fins.
Thanks again to my fantastic sponsors.
Damn cheap there is just way to many cool little bits going into this!
Also you may find THIS interesting
The site you posted was neat too. I downloaded a lot of scripts. The one you linked to can't fix the issue I currently have with SU, though. If you do a follow-me along a path that changes from all 3 axis, it tilts the shape you extrude. That 2nd pic is me trying to get an oblong channel to follow a spiral.
What I'm doing would require a way to do a follow-me operation along 2 paths...At least that would be the quickest way.
ow I see I remember trying to learn spirals for the helix res in that old simx project... think your right to just keep it in your head lol
So I upgraded the mockup...
-and I realized the current plan would add ~15 pounds of plastic.
-I think I'll remove a lot of the middle fins, and gradually taper them back for some extra complexity. It will also make the res insides more visible. I also don't have to cut the res tube to match up with the thickness of the fin assembly this way.
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