On 6/7/2015 11:42 PM, pyotr filipivich wrote:
DIY often means "We could have bought it for less ... but it was
the process which was why we did it."
...

I heartily agree! Not only the process, but the continuing satisfaction
when using the product of our own doing. However ... when the results
of doing it ourselves are not what we expected, there will be
disappointment; directly proportional to the time, effort and care that
we put into the project. Snag is putting a lot of care into his project
and there is the potential for a lot of disappointment.

I see the drill motor & PWM drive as the weak link, especially regarding
constancy of feed. For a powered feed on my lathe, I used a servo amp
with tach feedback and it's amazingly constant:
http://www.mwdropbox.com/dropbox/ServoPowerFeed.pdf
Buying the servo amp might be less satisfying than building your own PWM
drive, but I still get a REAL NICE feeling every time I use my power feed.

Bob