Hi from South Africa, a little help please

[irving2008]

The resistors are on the boards but they don't do current limiting, they are sense resistors that provide a voltage proportional to the winding current, typically 0.5v per amp. This is used to drive comparators that turn off the drive for a short period of time, the so-called 'chopper' action. This is done most easily with the L297 companion chip or a dual op-amp, a dual flipflop and a clock pulse e.g. 555 timer. There are several examples on the web.

There are other ways to do the necessary current limiting but not with the L298 chip.

(thanks for the PM btw, appreciated).