I was cutting 18 tpi imperial which means I have to disengage the feed after every pass .The machine I purchased is the imperial one not the metric.I tried to cut the thread leaving the feed engaged and the thread looked excellent but when I checked it with inch and metric thread gauges there was no match.I checked the gears and their positioning and they are correct.I measured the lead screw and its imperial also.Could the half nuts be out of adjustment?(I mean to loose or to tight) Thanks for your input |