Select an actuator with the correct stroke length of an air actuator

by aviral
(india)

i am working on a pneumatic gear shifter for a buggy ......i require an air actuator with a variable stroke length. actually a one which has 4 stages of motion.....what should i be looking for


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Bill says...

Hello Aviral.

When you say 4 stages of motion, do you mean 4 positions?

If it were me designing your application, I'd would simply select two double acting cylinders with the appropriate stroke lengths, and install them blind end to blind end.

Then, depending which of the 4 ports you put air into, the whole double actuator would move, along with the tooling, to provide 4 repeatable positions.

Hope this helps.

Cheers,

Bill

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Motor replacement with a higher HP motor

Can you replace a 3 hp motor with a 7 hp?

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Bill says...

Sure you can, as long as the shaft interconnects and mounts work properly.

I think what you are saying is can your air compressor handle a 7 HP motor if it is built to handle a 3 HP motor, though.

I am not your compressor design engineer. However, if it were me, and I knew that the RPM of the motor shaft was the same for both motors, your air compressor shouldn't care whether it's a 3HP or 7HP motor.

The issue that would concern me is if I had a mechanical failure in the pump that added load to the motor, the larger motor may not "notice" that, and continue running which might be catastrophic for the pump.

If I only had a 7HP motor replacement, and it was my compressor, and the motor RPM's were the same, I wouldn't hesitate.

Cheers and good luck.

Bill

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Select right type of air compressor

We are a fire, water, smoke restoration company. We use the cans of compressed air to clean electronics, appliances, and other hard to reach areas where smoke and dust has accumulated.

Can you suggest the size of small portable compressor that would best work for us. I am considering one for each of our trucks.

Susan

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Bill says...

Howdy Susan.

First off, I'd pick an oil-less compressor, to eliminate the potential for compressor oil to slip downstream from the compressor onto your electrical equipment.

Second, I'd make sure that I had a desiccant in-line dryer before the blow gun, to strip any moisture from the air before it blew onto a computer board or some such.

Then, what power supply will you have? If you are carting the compressor into a home from the truck, then 120 VAC will work, assuming the home / building you are restoring will have power available.

You can, then, probably get away with a 1/2 - 1 HP or so, 1 or 2 gallon tank, DIY type air compressor.

Ensure that it has a regulator and air filter at the discharge port.

The regulator (these are usually included) is to lower the pressure to the point where your blow gun does the job adequately without too much pressure to possibly cause damage.

The air filter to take free water out of the compressed air as it leaves the tank.

Again, just before the gun, install an in-line desiccant dryer to take out water moisture, and you are good to go.

Cheers,

Bill

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