mikey,
I'm measuring at the minor diameter of the Jacobs taper using the DI, it's where I'm coming up with the .010 runout. It's a bit confusing in that the collar in the pic in my original post indicates at .002 runout (??). Am I correct in assuming that if the bearings were an issue it would show at the collar as well as the JT ?? Or am I missing something ??
Only have the one DI (cheap HF DI) so haven't tried looking for needle bounce yet since the lowest speed on this DP is 685rpm according to what was listed in some of the manuals. So I wasn't sure if the needle swing at that speed could be mistaken for bounce or not.
Earlier you referred to running the DI "inside the taper", were you referring to the drive sleeve at the top of the headstock or the male Jacobs taper of the of the spindle ??Trying to check the right areas correctly. Thanks.
I'm measuring at the minor diameter of the Jacobs taper using the DI, it's where I'm coming up with the .010 runout. It's a bit confusing in that the collar in the pic in my original post indicates at .002 runout (??). Am I correct in assuming that if the bearings were an issue it would show at the collar as well as the JT ?? Or am I missing something ??
Only have the one DI (cheap HF DI) so haven't tried looking for needle bounce yet since the lowest speed on this DP is 685rpm according to what was listed in some of the manuals. So I wasn't sure if the needle swing at that speed could be mistaken for bounce or not.
Earlier you referred to running the DI "inside the taper", were you referring to the drive sleeve at the top of the headstock or the male Jacobs taper of the of the spindle ??Trying to check the right areas correctly. Thanks.