The built-in database has twenty common drivers listed. If you wish to enter a driver manually, you will need to supply up to four parameters.

If you don't know one of the values, just enter zero for it's value.The software will use the generic value based on the nominal diameter you select for the driver. (shown here in red)

When you return to the front screen, the known values will be shown in blue and any substitutions will be shown in red.

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