I am following this video to try to reprogram my z needle position. I get a z needle home error when the machine initializes.

https://www.youtube.com/watch?v=UvoCQgEuZlg

Problem is, when I go into service mode and select "Teachi" and press f2 for "ok" the menu disappears and I do not get a chance to move and program the needle.

When I hit "Teachr" I see some needle commands using CE and 0 but they won't move the needle.

What is the difference between "Teachi" and "Teachr"?

Any idea what is going on? I know the video is for an SIL-10AF but I'm seeing the same menus so I assume the cal method is the same.