I can't seem to get the correct feed rate for tapping using Gibbs with PostHaste. For example, I tell Gibbs that I am using a 3/8" tap with 24tpi and the feed rate that PostHaste gives me in the program is F25. If I change the tpi to 20 in Gibbs, PostHaste gives me F30. I have been having pretty good luck with PostHaste, but have not been able to figure this out. I would appreciate any help.
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Thanks Jeff, I had no idea that the speeds were tied to the feed rate.
Feed (IPM) = RPM X pitch
IPM = 1000 X 0.050 (1/4-20 ---- 1/20 = 0.050)
IPM = 50