power switches for ant and beetle weights Goto page Previous1, 2, 3Next
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Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
I would also like to give this a go. I take it this could handle 10A or so ? _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Mon Apr 02, 2012 7:13 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
hopefully it'll handle 10A lol
otherwise its kinda pointless
We haven't tested it yet though but it should do it, worst case we'll need the stainless steel bolt that had the bigger head or some heavier copper, but looking at what happens in the speed controllers, its not going to be far off. _________________ Mechanical engineers build weapons, civil engineers build targets
Jake - I received mine shortly before I left for honeymoon, will get it fired up sometime soon and provide feedback etc _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Wed Apr 25, 2012 6:18 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
sorry marto missed your post for some reason.
These are perhaps not production quality just yet.
I believe they are M1.6 screws.
Also the plan is to solder the wires on then cut channels in the polycarb top to let the wires out where you want them for your bot.
lemme know how it goes. _________________ Mechanical engineers build weapons, civil engineers build targets
I've ordered a few of these to try them out......main issue I think would be if the screw backs out during combat. The team whyachi switches fail "on" so avoid that problem. Perhaps a loctite patched screw would work here if they do tend to come loose.
Thu Apr 26, 2012 5:07 am
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
do it up tight, it won't come loose _________________ Mechanical engineers build weapons, civil engineers build targets
Sat Apr 28, 2012 9:42 am
kitbots
Joined: 25 Apr 2012
Posts: 23
quote:Originally posted by Valen:
do it up tight, it won't come loose
why wouldn't it? I've found loctite is pretty much essential in my bots to keep the screws tight. These switches will turn off if they loosen even a little.
There are all metal locknuts that could be soldered in place AND prevent the screw loosening off.......
Vibration could be an issue but I think @ the scale we are talking it would be fairly unlikely as the screw is a tiny M1.6 one. Also M1.6 locknuts?? They exist? I would like some.
We have been using variations on bolt switches in robots for years as have many in the community, nobody has had a problem with them turning off yet.
Those switches are used in high power rockets often pulling 100G with 50G vibration on top of that. Again still not coming loose.
Your solving a problem that doesn't exist.
If it was part of a joint where there was actual force and movement and the bolt was being structural then its a different issue.
The tightening force would be measured in KG, the forces acting on the bolt would be measured in grams. _________________ Mechanical engineers build weapons, civil engineers build targets
Sat Apr 28, 2012 7:54 pm
kitbots
Joined: 25 Apr 2012
Posts: 23
Well if they have worked in practice then I'll give them a chance as is.
Thanks, Pete
Sun Apr 29, 2012 12:50 am
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
and then you can blame jake when it comes loose
haha _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Sun Apr 29, 2012 5:49 pm
Philip Experienced Roboteer
Joined: 18 Jun 2004
Posts: 3842
Location: Queensland near Brisbane
quote:Originally posted by Nick:
I could definitely use one! BTW: I can get the M1.6 screws for under 2 cents from McMaster if you want.
Is that right? I would like 100 of the M1.6 at that sort of price next time you put in an order, please. _________________ So even the rain that falls isn't actually going to fill our dams and our river systems
Mon May 14, 2012 7:50 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
so has anybody i sent a switch to actually put it in a robot? ;-> _________________ Mechanical engineers build weapons, civil engineers build targets
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