DC motor & control

DanO

DanO

AzB Silver Member
Silver Member
Just bought a PSI Penn State Industries DC 1/2HP motor and control. Working on a secondary lathe project and I wanted to get a motor before deciding on the pulleys.

The motor is solid. Very happy with my selection there. The problem is the speed. I wanted to go with a direct drive with no step pulley.

The PSI starting speed is 1800 RPM (not noted) and the high end clocks in @ 3800 RPM. I can easily go with a 2 to 1 pulley dropping the high end to 1900 but that only cuts the low end to 900 RPM.

I was expecting the controller to start @ zero. :(

Is there a controller that cuts the PSI down to zero, or do I need to take a different approach? I like to clean shafts and turn squares @ around 200 RPM.

I do not want to add a secondary slow speed motor. Clean and solid on this one.
 
DanO said:
Just bought a PSI Penn State Industries DC 1/2HP motor and control. Working on a secondary lathe project and I wanted to get a motor before deciding on the pulleys.

The motor is solid. Very happy with my selection there. The problem is the speed. I wanted to go with a direct drive with no step pulley.

The PSI starting speed is 1800 RPM (not noted) and the high end clocks in @ 3800 RPM. I can easily go with a 2 to 1 pulley dropping the high end to 1900 but that only cuts the low end to 900 RPM.

I was expecting the controller to start @ zero. :(

Is there a controller that cuts the PSI down to zero, or do I need to take a different approach? I like to clean shafts and turn squares @ around 200 RPM.

I do not want to add a secondary slow speed motor. Clean and solid on this one.
Click to expand...


There are three turning post in the control box that will let you change the speeds.
 
open the control box and mark the 3 pots so you can put them back if needed.

turn the pot closest to the big brown capacitor just a little JUST A LITTLE clock wise and try it out.

make all adjustments with the box unplugged..... then test your adjustment.....

It will slow you starting speed....................


Kim
 
whammo57 said:
open the control box and mark the 3 pots so you can put them back if needed.

turn the pot closest to the big brown capacitor just a little JUST A LITTLE clock wise and try it out.

make all adjustments with the box unplugged..... then test your adjustment.....

It will slow you starting speed....................


Kim
Click to expand...

Good info.

How slow can you slow the starting speed down to?

Thanks
Dake
 
All I can say is WOW. I have the full range of the potentiometer and I'm running 0 to 3k according to my digital tach. Or I can set it to 2000 max and it zeros out around half dial. This leaves me open to any pulley combination I decide on. I'm leaning towards the zero to 3k with a 1 up to 2 pulley to double the torque for no particular reason. Or I'll go 1 to 1 as originally planned since I'm not coring with this set up.

Kim, you weren't kidding with the JUST A LITTLE statement. Jeez I barely move it. What's the other two pots do?

Thank You gentlemen.
 
Has anyone tried replacing the on off rocker switch on the PSI controller with an on off on switch? Just trying to simplify and not add a secondary box for the polarity change for reversing.

Thanks.
 
That would not do you any good since that switch is on the AC input side of the circuit. And may or may not cause some problems. But it would not reverse the rotation of the motor. You have to reverse the polarity of the DC output in order the reverse the motors rotation.
 
DanO said:
Has anyone tried replacing the on off rocker switch on the PSI controller with an on off on switch? Just trying to simplify and not add a secondary box for the polarity change for reversing.

Thanks.
Click to expand...

I added a reversing switch to my penn controller and have been using it for over two years with no problems. I left the original on off switch intact and put the reversing switch right beside it.
 
Last edited:
tsp&b said:
That would not do you any good since that switch is on the AC input side of the circuit. And may or may not cause some problems. But it would not reverse the rotation of the motor. You have to reverse the polarity of the DC output in order the reverse the motors rotation.
Click to expand...

That was my concern since I seen the motor leads going to the board.
Thanks again gentlemen.
 
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