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Assuming I've got the right email address, you've got mail. Extrapolating from the data about other titanium's and what the book says the gist of it is: 830-915C for maximum 1h (likely below 30 mins due to being thin material) for the solution treatment. Water quench. Age at 480-595C for 4ish hours....
I'm going to the library tomorrow so I'll grab some scans/pictures of the book. You're looking at temperatures of the order of 1000+°C without using a direct flame (makes titanium carbide, hard but brittle) so induction heating might be an idea to get it up to initial temperature. The ageing bit req...
We did some labs at university on material treatments. Proper heat treatment of titanium is most likely a bit beyond your average person although if you're interested I'm pretty sure we have the heat treatment handbook floating around the library somewhere. Should be able to work harden it easily en...
- Sat Apr 27, 2013 7:40 am
- Forum: Roboteer Websites
- Topic: need advice on source for gears and/or the best forum
- Replies: 2
- Views: 1732
With the loading required you could quite possibly get away with only using a pulley type mechanism. Consider a reversing belt drive ( 180 degree twist in the belt ). Stick the pulleys on the hinge axis of your door and then permanently attach the rope/belt/chain to the pulley. When you open either ...
Just plug the battery into a spare channel, make sure + in on the middle pin of the receiver and you won't break anything. I think for your receiver - is closest to the edge. If it doesn't work put negative on the other side.
Positive should be on the middle pin and negative closest to the edge, you might want to see if you can swap the battery connector for a three pin one so plugging it in the wrong way round just won't work rather than blowing up something
- Fri Mar 22, 2013 7:59 am
- Forum: Antweights
- Topic: Antweight bits for beginners
- Replies: 36
- Views: 30371
It would, might have to play with potentiometer values or hack your transmitter to get the extra travel. Simplest way I can think of is put a resistor on each side of the pot track making it effectively longer so it has to travel further to get the same proportion of voltages hence your axe travel f...
- Thu Feb 14, 2013 5:34 pm
- Forum: Off-topic
- Topic: Slip rings, rotary connectors, reels, etc.
- Replies: 4
- Views: 3113
Couldn't you build something roll up extension lead style? No slip rings plus extends from one end. No auto retract though but you could buy a cheap retractable tape measure, swap the tape for wire, run one end out a hole made in the centre of the reel and case and the other through the tape hole. M...
- Wed Feb 06, 2013 11:39 pm
- Forum: Questions (and answers)
- Topic: Polycarbonate vs HDPE
- Replies: 12
- Views: 5644
I've cold bent acrylic to the right shape then used a heat gun to get it close to melting to relieve the stress. The closer to melting you get it the less it springs back. HDPE should work better than acrylic because it cold bends better and has a lower melting point (you could dunk it in boiling wa...
- Wed Jan 02, 2013 6:27 pm
- Forum: Antweights
- Topic: Servos as speed controllers and cheapo 9g gear motors!
- Replies: 22
- Views: 5071
Replace the potentiometer with a trimpot or a pair of resistors. should get you close enough to deal with any wandering using radio trims.
- Wed Dec 12, 2012 3:50 pm
- Forum: Antweights
- Topic: charging smaller lipo batteries
- Replies: 8
- Views: 2303
That one can only do 2s or 3s lipo's. You could probably cheat and solder a couple of micro jst connectors to the balance lead and get it to treat the cells a 2s or 3s battery. As it's balancing the cells and you won't be soldering cells together you shouldn't get any explosions.
Would allowing slip in the drive via a friction clutch or belt work? Static friction coefficient (not slipping) is generally more than Dynamic friction coefficient (slipping) so when the output shaft is stalled the load on it is reduced making more power available to the other outputs. I may be talk...