Testing final fit in the shop:
Finally, in action again!
(Various gravel and rocks were found and thrown in the mixer to “polish” :D )
Can’t forget all the welding I did either. Yes, I know you shouldn’t weld galvanized steel! (It makes some nasty smells that you REALLY don’t want in your lungs) It was what was available.
I did some machining for the hub:
In my last post, I showed a 30W diode-pumped laser; it came out of an etching laser used primarily on stainless steel; (30W is nowhere near powerful enough to cut metal) but it should be enough to cut 1/4″ plywood well enough.
When cutting metal, something like 4kW is more appropriate, which is what cut these parts I designed:
These will become a new flat belt pulley for a very, very old cement mixer. Next opportunity I get, I’ll post a picture of the assembly; bottom line is that I’ll be TIG (aka GTAW) for the welding it.
I’ve been wanting to build a laser cutter like lasersaur or build.net for years now, but I haven’t been able to build up enough cash yet to do it. I do have a dangerously powerful laser pointer (OK actually I have like, 5 of them) that I built in college in 2008, however…
I swept aside some of the other crap on the desk, and installed Ye Olde Beefcake Supply to provide the 12v it needs, using the multimeter to make sure I don’t give it too much juice. 200mA seems about right – I know it can take 300, but I just don’t want to risk it.
I’m a big fan of retaining my eyesight, so I ramped up the voltage to a point where I can see it in order to focus on the black origami paper (electrical tape works fine too)
This picture is kind of crap, but that’s the best I can do with my phone. I set pronterface to 50mm/minute and ran in straight lines… success! it pretty much “etched” the paper, enough so that it appears as though it were die cut. Pictures were difficult to take, however – I can’t focus that close on such a fine line.
I’m not likely to continue with this, as I plan on bringing this particular printer back in to service as soon as the replacement extruder arrives in the mail.
Make a battery pack!
I have the worst tendency to just go ahead and make things, but the gist of this is 12 used laptop batteries connected 3s3p using flat wire braid, silicone wire, and a male 3s balance connector from the LHS.
Check out the wacky flat cells in there… I haven’t seen another one like it since then… I’m not sure what that form is even called.
At least this is better than the default WordPress “Hello World”.
Let’s see how long it takes me before I update this…