Easy....
First, if separate power switch no work needed there if it is built into the speed control then justa but more work needed.
My description can be used for both, describing just the speed control, if power also needed then just do same for the switch on the speed pot.
Locate a place where a toggle switch can be installed.
SPDP for speed, 2P2P for speed and power.
Also locate another pot of approximately save value as speed control.
You will need to do some voltage measurements to confirm things, but we will ASSUME the speed control is connected between a supply voltage and ground with the center "wiper" providing the signal to the controller.
If this is true, then locate a spot to mount second pot, a multi-turn pot would be better as it is less likely to drift.
Connect a wire from each end of existing pot to new one so they are parallel.
STOP
Test lathe to make sure still operates normally then unplug and wait minute.
Disconnect the wire from center of existing pot to center terminal of switch, a new wire from outside terminals of switch to the center of each pot.
Now you can select existing that you can adjust on fly or second one.
The second one is your fixed speed, pot can be hidden or otherwise.
Sent from my SM-G781V using Tapatalk
First, if separate power switch no work needed there if it is built into the speed control then justa but more work needed.
My description can be used for both, describing just the speed control, if power also needed then just do same for the switch on the speed pot.
Locate a place where a toggle switch can be installed.
SPDP for speed, 2P2P for speed and power.
Also locate another pot of approximately save value as speed control.
You will need to do some voltage measurements to confirm things, but we will ASSUME the speed control is connected between a supply voltage and ground with the center "wiper" providing the signal to the controller.
If this is true, then locate a spot to mount second pot, a multi-turn pot would be better as it is less likely to drift.
Connect a wire from each end of existing pot to new one so they are parallel.
STOP
Test lathe to make sure still operates normally then unplug and wait minute.
Disconnect the wire from center of existing pot to center terminal of switch, a new wire from outside terminals of switch to the center of each pot.
Now you can select existing that you can adjust on fly or second one.
The second one is your fixed speed, pot can be hidden or otherwise.
Sent from my SM-G781V using Tapatalk