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Drill Torque Loss Answered

Hi,

I am having some trouble with torque loss from a drill motor and gearbox I harvested for a project. I followed the steps in this instructable (https://www.instructables.com/id/Hacking-Drills-CheapPowerful-GearboxMotors-for-/) to get the motor and gearbox. I then hooked it up to a motorshield and an arduino.

Originally the drill (Rigid 18v Cordless) States that it can deliver close to 500 lb-in of torque. However when I hook it up to my apparatus I am able to stop the spinning with my hand.

I use PWM to control the speed but upping the speed still does not produce the required torque.

If anyone has any ideas as to why it dropped in torque I would be very appreciative.

Thank you in advanced.

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Alipha
Alipha

5 years ago

I apologize for posting in two threads, I switched over to this one after realizing the description was better suited.

I am powering it with the 18V Li-ion battery.

I am using the MD10C motor shield from Cytron (https://docs.google.com/document/d/1rgQzn-nWn-qcWN...

The power supply is being capped at 30A by an inline fuse.

My thinking is that the PWM is limiting the voltage and hence the current because event at stall it is not drawing above 20A. And if I bypass the arduino and shield it will jump well above 30A at stall.

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mpilchfamily
mpilchfamily

5 years ago

Your not feeding the motor enough power. What motor shield are you using?

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Downunder35m
Downunder35m

5 years ago

If you don't have the patience to wait for a response to a single thread, it makes sense to include all details instead of opening another thread.
Caitlinsdad already pointed in the right direction.

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caitlinsdad
caitlinsdad

5 years ago

How many volts are your supplying to the drill motor and what amperage is the power supply capable of?