Which Actuator?

[aero_storm]

Hi,

I have a problem. I have no idea what actuator to use. I cant even find a suitable website to buy off. If possible, I need one that is self contained with batteries. I have looked before anyone accuses me off not researching so any of you who were about to accuse me, go on to my profile and look at my motto.

Thanks,

Alex R

[joey_picus]

Is there a reason you need one thats self contained with batteries?

[aero_storm]

Its easier I suppose, for a first time builder. I am however prepared to get one that isnt self contained, if need be.

Thanks,

Alex

[typhoon_driver]

alex it would actually be far easier to have a unit that is not self contained.

Its easier to use a single battery pack for everything in a machine as you require a removeable link for every seperate power source in your robot. These have to be positioned together which can make your life more tricky.

I suggest looking on ebay for an actuator or failing that look for companies that specialise in them based in the UK. If they dont have shopping carts etc then send them an email and maybe even ask for sponsorship (you would be amazed what you can get for free).

As an aside, your post comes across as very aggressive along with your motto on your profile. If you take a friendlier approach people will be more willing to help you out.

[aero_storm]

erm.....Sorry. it was meant as a joke but Ill change it:blush:.

Alex

[typhoon_driver]

no worries mate.

One thing I have learned after a few years on this forum is to always think two or three times about what you write!

[aero_storm]

Dont I know it!

Alex

[aero_storm]

No-one has really posted any actuators on this page. Sorry to bump this thread but I am getting desperate. Please help.

Alex

[typhoon_driver]

no idea if rob still sells them but

http://www.robotstuff.freehomepage.com/catalog.htmlhttp://www.robotstuff.freehomepage.com/catalog.html

if you can still get them for 18 quid for one then you will doing good as you will looking to pay 150 quid easily for one. I would drop him an email and ask.

What might help people post is to post what specification you are looking for. Ie the travel of the linear actuator, the weight, the force you are looking for etc.

You can easily make your own actuator using a drill motor and a car jack. Weighs a fair bit but it will work nicely. Or you can make one using a threaded rod and nut. This is what ploughbot does along with a couple of others.

I will see if i can find pics on the net later.

[aero_storm]

Thanks Gary, I owe you yet another one.
I was looking for about 40-60kg of lift, about a 10-15cm extension, and as fast as possible i.e 40mm/s as a minimum. If possible, I would also like it to be quite a low voltage, so that it is cheaper to over-volt.

Thanks again Gary,

Alex