1000ppr encoder

Hi, I have just rebuilt my lathe and decided to get an Omron 1000ppr encoder to replace my home made a + z one, in the hope to do rigid tapping.. My question is, I cant seem to get above 250rpm (checking the spindle position hal test). My ini file is set to a base of 30000. Is this encoder ok to use with a parallel port card, and what sort of speeds should i expect? With my home made one with 60 slots I could thread at 1200rpm

250 RPM is 4.166 RPS so that's a count period of 60 usec
at 1000 PPR = 4000 counts per turn. This is 1/2 the
maximum possible  count rate at a 30 usec base thread
sample period but:

1. Quadrature is never perfect square waves so the pulses may
be narrower than expected.

2. The 30 usec base thread period has jitter added so the sample
period may be considerably longer when you add latency spikes,

So basically the base thread rate will limit the maximum countable
RPM especially on higher resolution encoders.

Hi. So a Mesa card is on the cards in the near future. But for now, my encoder came with a 40 tooth pulley and a 10 tooth pulley. If I had to do a 4:1 ratio and edit my hal file from 4000 to 1000 (making it a 250ppr encoder) would this work and would this help? Bearing in mind the encoder is driven from spindle and not motor