# Linear actuator motor

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countersunk
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Linear actuator motor

Can a 12v/24v, 3a, 150 RPM motor fitted with a lead screw (linear actuator) produce a thrust of 600 N? What would be the ideal confiuration of a motor (AC/DC) to produce a thrust of 600N?

colin9876
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Re: Linear actuator motor

In physics theory a force in Newtons can be produced by a small motor of any size depending on the gearing!
What is limited is the WORK DONE, i.e. the force x the distance

So a 24v 3a motor is 72watts, or 72joules of energy per second
so excluding losses, this could produce a force of 600N over a distance of abount 12cm per second (as 600 x .12 = 72)

what do u want this linear force to move?

countersunk
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Re: Linear actuator motor

HI Colin!
Thank you for your reply! I am making a prototype of a fowler bed where 1/3rd part of bed is lifted through an angle of 75 degree. I am looking for a suitable motor to do the job. The rate of displacement can be controlled to some extent as the pitch and helix of the lead screw would be designed accordingly.

Regards,

colin9876
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Re: Linear actuator motor

ok so I would estimate max 100kg load on that 1/3rd of hospital bed

This means an 70w motor could lift 100kg at a theoretical max of 7cm/sec which would be fast enough, so ur 24v 3a motor would be ok, but as you rightly point out getting it to work ALL DEPENDS ON THE GEARING.
most hospital beds work on mains power so could use an AC 240v motor, or do you want this to run off a back-up battery?

countersunk
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Re: Linear actuator motor

HI Colin!
240V AC motor will do, infact would be better option, but I think it will need a bigger reduction gearbox to reduce the rpm. The

assembly needs to be compact and make minimum noise. WHich one do you think would be optimum for use?

Regards.

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