BobRip
Elite Member
Or just get a small six volt battery and charge it separately occasionally. Your use is very low duty cycle with low torque. A six volt battery should work in this situation.
is there any way to slow down a DC motor?
- Thread starter Wyld Bill
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Or just get a small six volt battery and charge it separately occasionally. Your use is very low duty cycle with low torque. A six volt battery should work in this situation.
ptgdigger
Silver Member
The winch on the deflector is the wrong tool for the job, you would be MUCH better served just using a linear actuator for that function , much lighter wiring , no heavy duty switch or contactor and a nice slow controlled movement.
See that steel triangle on your chute below the winch? thats about where the bottom of the actuator would mount.
6" stroke: New Xscorpion 6" Linear Actuator 12 Volt DC 450 lb Static w Adjustable Stroke | eBay
8" stroke: New Xscorpion 8" Linear Actuator 12 Volt DC 450 lb Static w Adjustable Stroke | eBay
Ray
See that steel triangle on your chute below the winch? thats about where the bottom of the actuator would mount.
6" stroke: New Xscorpion 6" Linear Actuator 12 Volt DC 450 lb Static w Adjustable Stroke | eBay
8" stroke: New Xscorpion 8" Linear Actuator 12 Volt DC 450 lb Static w Adjustable Stroke | eBay
Ray
JRP
Platinum Member
Wyld Bill said:
Lower voltage will slow down a DC motor. If there are relays involved you need to make sure the relays still get the correct voltage. A resistor in series will give you lower voltage. The resistor, however, is not efficient and wastes energy in the form of heat. Go see a golf cart shop. They might have a new or used set up for you.
A resistor must have the right ohm value and must have a power rating (watts) higher than what you will put into it. Power is volts x amps.
JRP
Platinum Member
Wyld Bill said:
Yes
If you lower the voltage across the motor it will turn slower. A resistor in series with the motor will lower the voltage across the motor. Make sure the resistor watt value is higher than the power you will put into it. That is watts, volts x amps.
Go see a golf cart shop. They are experts at making DC motors variable speed and may fix you up with a used setup.
sparc
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Maybe you'd be better off with some 12v linear actuators than using those winch motors.
Neither the chute discharge angle or rotation would take much movement. With some
simple linkage or a lever and drum you get movement in whatever direction you want.
You can get linear actuators that are geared for different travel rates. Their motive force
is a function of the actuator motor size (fractional HP) and gearing. Travel rates in the
range of 2"/sec with 25# of force or 0.5"/sec. with 100# force are common, and you
can get even slower/stronger ones.
It would have been helpful to those who responded early on if they knew the application
in your first post. A photo and description of what you wanted to accomplish would have
yeilded responses that were more in line with your needs.
Neither the chute discharge angle or rotation would take much movement. With some
simple linkage or a lever and drum you get movement in whatever direction you want.
You can get linear actuators that are geared for different travel rates. Their motive force
is a function of the actuator motor size (fractional HP) and gearing. Travel rates in the
range of 2"/sec with 25# of force or 0.5"/sec. with 100# force are common, and you
can get even slower/stronger ones.
It would have been helpful to those who responded early on if they knew the application
in your first post. A photo and description of what you wanted to accomplish would have
yeilded responses that were more in line with your needs.
woodsmith
Bronze Member
You could probably replace that with a windscreen wiper motor. It will move slowly and it can make the reciprocating motion that I think you are after.
By wiring it through a switch you can get it to start and stop where you want or you can use the auto park to stop it in the same place each time.
Something like this might work.
By wiring it through a switch you can get it to start and stop where you want or you can use the auto park to stop it in the same place each time.
Something like this might work.
Yeah that was my origonal idea of what to do but I already had all the parts to do this so I figured what the heck. It works good it is just a bit too fast. Also a lot of the linear actuators I looked at had the opposite problem,...they were super slow. That and people have had trouble with water getting in them.
Well I think the best route to go for now is a in-line resistor. I don't can if it "wastes energy" I'm just using it intermittently on occation. I dont care if it produces heat since it will BE WINTER. So I just need to find a resistor with a high Wattage rating but low resistance.
I'm just thinking,....I replaced a BUNCH of SCR slave and master controllers in some ventilation units with electric heat a few years ago. A lot of the old SCRs were still good with a nice big aluminum heat sink on them. Probably could hae used one of them.
I'm just thinking,....I replaced a BUNCH of SCR slave and master controllers in some ventilation units with electric heat a few years ago. A lot of the old SCRs were still good with a nice big aluminum heat sink on them. Probably could hae used one of them.
