Thanks for the earlier info re brown pestel. The manual obtained with the machine specifies a BP unit, but the only ID on the boards suggests its a Parametrics. Three separate terminal blocks, TB2 power in, TB3 power out, (these two self explanatory) and TB1 the control signals. Is there any info av...

[quote="Martin"][/quote]
many thanks for the quick response, I'll get on with the reading

Can anyone supply info re the connections to terminal block 1 (6 way) on the Brown Pestell spindle speed control.