I've never seen an okuma skip lines EXCEPT when you are uploading/downloading thru RS-232 and your communications are not set up right. Then lines are blown during transmission and the Okuma detects them as you try to run it. Are you doing this by chance? I'd have to admit, I've been disappointed with the Okuma's of late. The
Cadet mate was a weak joke and the Cadet with 700U was a giant ...