did you get my e-mail gary?
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did you get my e-mail gary?
yeah sorry was runnning out the door jst after I posted. reply sent
Right for a 4ch reciever do i need four seperate crytals on four seperate channels?
Nope you only need 1 crystal per receiver.
Could someone give advice on this setup-
4 wiper motors at 24v, gearbox removed like gary says, running off 2 12v 5ah batteries in parallel to give 24v. I plan to use 2x 30amp electronize speedos. Could someone say if this would work and maybe battery life i could expect and any other advise (not on weight). I obviously need to put each pair of motors in paralell to get 24v in them?
i think it would be in series to give 24V not parallel
batteries in series, motors in parallel.
yeh realised that
so is there anything else about this setup that screams ah noob to anyone?
Yes Windscreen Wiper motors :)
Interms of amount of time lasted I would guess a fair amount! I ran 2x Technobots WW motors for about 15min @24v on 2.2amp SLA batteries. So I would expect about the same from yours if not longer.
Regards
Ian
k ty. Yeh ww motors are noobish but hey so wat (retorical question).
I plan to use would i connect the speedos in parallel to the batteries so i get 24v going through both?
yes, and then you connect each individual motor in parallel again to the speedo as you will want the 24v going to both motors
Is it possible to get a mixer(s) for electronizes that will let 1 receiver output control motors in forward and reverse of two seperate speedos, and another output to make one side go forward and the other backwards so it will turn?
Thats what any mixer does. The GWS one from technobots is one of the best.
ok thanks, i knew thats what mixers do but i wasnt sure if they worked for electronizes or which ones did.
any recommendations for good but cheap 40mhz fm transmitters?
I started out with the Futuba 2ER which Technobots (http://www.technobots.co.ukhttp://www.technobots.co.uk) now sell for just under £40. That includes the receiver and two servos, although you probably wont need the servos. It only has two channels however, so youll need to replace it if you add any weapons that need remote control.
http://www.technobots.co.uk/en-gb/dept_546.htmlhttp://www.technobots.co.uk/en-gb/dept_546.html
Ok i think we might get that one. Does anyone know of any with a few more channels but are still reasonably priced?
The minimum your going to pay for a 3+ channel 40mhz radio set is going to be about £100 unless you find someone selling second hand.
You could try looking at the Hitech radio kits. I found one place selling them here.
http://www.westbourne-model.co.uk/Hi...0Radios.htmYou
I would highly rate the Laser 4/6. It comes complete with a mixer in the TX which saves you putting one in the robot.
Regards
Ian
Have a look on Ebay for 40 mhz transmitters and recievers. I picked up a brand new 6 channel Futaba set for £95. Bargin!
Thanks, i just ordered a lazer 4 today
Hi
Im looking to build a lifter/flipper in my bot taking this into consideration- less than 100 psi, easy quick and cheap(£40-£70) to build, takes up little space. I was thinking linear actuator unless someone else can think of something that fits the spec
think about using a window wiper mechanism . Im no expert but they are cheap and can lift alot , im not sure about space wise though
well funnilly enough i bought a 10 pack of ww motors. Ive got a reasonable amount of room. Could any1 give me info on ww system or other systems
The WW Mechanism sold by Technobots isnt really suited to a featherweight lifter mechanism. Maybe if youve got a welder and lots of extra space in your robot, it might just work. If I were you Id start looking for a decent and compact linear actuator to buy with your £40-£70. You could probably make quite a decent homemade one if you put your mind to it.
Na when you get free money spend it, dont make a homemade one. How bout http://technobots.co.uk/en-gb/dept_528.htmlhttp://technobots.co.uk/en-gb/dept_528.html KIT D. Would that be ok?
Can anyone explain how a motor lifter would work like the ww one?
Sorry i didnt mean a window wiper i meant a window Winder , It is in the side of the door in a electric car windows it can lift quit alot att hight voltage
Might be worth looking at a Zeobot type actuator http://www.technobots.co.uk/en-gb/dept_528.htmlhttp://www.technobots.co.uk/en-gb/dept_528.html you can either buy the kit or make your own. I made one a while back and used a threaded rod from a workmate and put a drill motor on the end.
http://www.teamblazer.50megs.com/images/flybot_arm_testing.jpghttp://www.teamblazer.50megs.com/ima...rm_testing.jpg
http://www.teamblazer.50megs.com/images/arm.jpghttp://www.teamblazer.50megs.com/images/arm.jpg
ok. well any opinions on the zeobot actuator?
Space wise I have about 40-50cm length and bout 20-30cm width
We use an electric window winder mechanism from a renault with its stock CIM motor and we can easily lift 35kg with a 50cm arm on 12v with the unit held in our bench vise. We have put two of these in our lifter bot Haemorrhage and our new one. Haemorrhage has a drill motor adapted for its so it can lifter within half a second on 12v while the new lifter bot has the standard motor and can lift completely in 1 sec on 24v.
I can supply some pictures and possibly a small video is anyone is interested in the mechanism and how weve wired it up.
Picture of the new lifter on my profile
I would be interested in that, Im looking at the possibility of using a similar system and it would be great to have some pictures of how it can be done. :)
Many thanks,
Lenny
those zeobopt motors dont really look up to the job for full on featherweight fights, i used one in the same way over2 years ago in ploughbot. lifted 6kg, but 12 it struggled too much. Robo Challenge use a Window wiper motor with a car jack on the end for the pit, it lifts atleast 80/90kg. I think your best bet is probably the same mechanism on a drill or gold motor, i have been trying to send some pictures out recently of mine, not sending though.
Ok well ive got plenty of ww motors at my disposal, im thinking of either a similar system to alans or a car jack. Any1 any ideas how heavy and big a car jack is?
A car jack can be quite chunky. If you strip down a cheap workbech such as the one here: http://www.toolstation.com/index.html?code=12739http://www.toolstation.com/index.html?code=12739
Then you can take out the leadscrew assembly. I just brought one and did that this morning actually after seeing Alans format. A drill motor should have plenty of torque to lift a feather at the end of an assembly like the one Alans made, and at quite a speed. A windscreen wiper motor would work but would be horribly slow.
I pop some pictures of the assembly up this evening. As for mark Na when you get free money spend it, dont make a homemade one ... free money?
Grant of BNG (british nuclear fuels)
Anybody have any idea of the reduction inside a technobot wiper motor?
And does anybody with good cad skills like to do me a drawing?
What do you want drawing and to what quality? ie.producing parts for milling or rough prototype.
Chris - http://www.featherweights.org/forum