Second post from me in two days...
This one relates to my next jobs on that cleaned up aluminium offcut but is also quite pertinent to the 'learning the basics' question.
My Uni spends a lot of time in drilling mode and does a pretty decent job of it for someone who can't find space for a dedicated pillar drill but I am often left feeling that there is room for improvement with my technique with holes slightly off target or deep holes diverging from the vertical by more than I would like.?
So... ?excluding modifications to the original machine, ?how to do drilling better on the DB or SL??
Specific variations and questions...
When to clamp and when to slide the vice/job around to move between holes??
Holding sheet material too big for a vice or table
How to hit the mark accurately (or why do I often miss?)?
Centre punch or edge find and use the dials??
Centre drill or not? (I now use a 3mm 90 degree spotting drill which is easier to eyeball onto marks)?
Do all ops on one hole before moving to the next or do all holes with one tool before changing tools??
Tool changes and limited quill travel (a consideration that the drilling section of 'Miniature Machining Techniques' seems to ignore)?
There may be better reading material available - most of what I have is about lathe work.?
Regards, Andy
