small speedo for selfrighter drill motor

[calumco]

anybody suggest me a speedo thats small and can be used for a drill motor running a selfrighters gear box. Ive got a sabertooth10a would that do or wouldnt it like it? Ive got a million electronizes laying about but they are too big and bulky

[plargen]

Re: small speedo for selfrighter drill motor

these might work depends on voltage

http://www.ebay.co.uk/itm/Marine-50A-Sp ... 35c3ff5af6





im using these to drive both my present bots

http://www.ebay.co.uk/itm/7-2V-16V-320A ... 3cc5ac5bda

[Bodge Job]

Re: small speedo for selfrighter drill motor

i would have thought it depended on the extra gear reduction, if is a largeish reduction then i would have thought the sabertooth would be fine as it shouldn't stall, and if it does draw to much the esc should limit it

[maddox10]

Re: small speedo for selfrighter drill motor

http://www.botbitz.com/index.php?route= ... duct_id=56

[calumco]

Re: small speedo for selfrighter drill motor

sorry forgot to say, 18 v drill running on 22 volts, and its got 3x drill gearbox innards built into 1 so dunno what the ratio is, but its slow and powerful, will check the links out thou cheers guys

[typhoon_driver]

Re: small speedo for selfrighter drill motor

Why not just use a relay instead of a speed controller?

[Max]

Re: small speedo for selfrighter drill motor

You could even make it act like a servo with a potentiometer to make it much easier to control.

[Gabe01]

Re: small speedo for selfrighter drill motor

Two interesting concepts Gentlman, for myself I'm looking to control an actuator. If one could make it behave like a servo I would be very happy. E.g. If I moved the stick halfway the actuator will move halfway and so on. I am keen on seeing your responses, and links are always welcome, the system is running 18v Gimson actuators. I appreciate this is a tiny bit of a thread hijack.

[typhoon_driver]

Re: small speedo for selfrighter drill motor

George francis used to make a controller that did just this. As far as I know took a feedback and was able to turn a motor into a precise servo. Although these are like ducks teeth to find these days.

As for a current product that can do the same? I'm not aware of such a thing.

[widow_twanky]

Re: small speedo for selfrighter drill motor

George francis used to make a controller that did just this. As far as I know took a feedback and was able to turn a motor into a precise servo. Although these are like ducks teeth to find these days.

As for a current product that can do the same? I'm not aware of such a thing.

Seem to reacall that the george francis ones were simply fitted with limit switch connections.

The team delta relays http://www.servocity.com/html/electroni ... _dual.html are also fitted with limit switches but the actuator we have in Cylon has these integral anyway so aren't necessary. Control of actuator position is simply apply power to move, take power off to stop.

Most of the Roboteqs are capable of closed loop position mode http://www.roboteq.com/technology/robot ... motormodes as are many other controllers. Never used them but you just need to look at the instruction manuals.

In reality using the relay just gives you one big servo. I had thought about using those for an axes (Put a cam on the shaft to operate limit switches and you're away

Andy

[Max]

Re: small speedo for selfrighter drill motor

Her are some good links for making a giant servo using an arduino:

An introduction to making a linear actuator into a servo:
http://www.youtube.com/watch?v=BP8cc5he ... sults_main

An explanation of how it work:
http://www.youtube.com/watch?v=T3PiexN1 ... 0B9916E4AD

A good website explaining the code:
http://abigmagnet.blogspot.co.uk/2008/1 ... t-one.html

[calumco]

Re: small speedo for selfrighter drill motor

i think i'd have my weapon and selfrighter on a seperate tx for someone else to do the weapons for me cause managing driving, weapon and a self righter would be impossible! think i'll just go for a speedo, i no james uses little speedos for the drill motor that powers for the arms of preditor.