On Feb 4, 9:

I think I understand the switches, transformer and relays. �And, how to
change the lathe to 220v. � I do not understand what the "Heating Relay"
does.

Fred

The FR relay is probably the overload for the motor. See the FR NC
contact in the KM1 coil cirucit for KM1.

From the photograph it appears that the 110 connection on the
transformer needs to be moved to the 220 connection in a 220 mode.

The notes refer to Figure 10 as 110 volt wiring and Figure 11 as 220
volt wiring. Do you have Figure 11?

KM1 applies the power to the motor through KM2 or KM3 depending on
which is selected. This provides direction. Forward or reverse.

I see what to do to change the control circuit to 220 but not what to
change to make the motor 220.

More tomorrow. Too sleepy to continue.

Bob AZ