Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
  topic list next in topic

Subject: Speed control for laminator motor

From: Richard Spelling <rls@...>
Date: 2010-04-29

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Went to bed tired and annoyed I couldn't easily find a slower gear motor
for the laminator.

Dreamed about building a magical speed controller that would let me run
the existing motor infinitely slow.

Realized I could use "temporal kinetic and thermal stabilization" since
it's a worm gear motor.

I.E., I build a standard PWM controller but set the frequency real
sloowwwwww.

Imagine having the speed turned down real low. Along comes a pulse. The
motor spins up and turns the worm screw a revolution or two, then spins
down. The board advances a fraction of an inch. An in-determinant amount
of time later, along comes another pulse.

Yes, it's "jogging" the board forward and not continuous motion, but
between jogs it sits between the rollers long enough for the heat to
transfer through the paper.

I'm thinking about 10Hz.

Whatcha think? Just another crazy idear from Richard?

Now I just need to build the board.

Wait a second, I need my laminator to build the board to fix the laminator!


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iEYEARECAAYFAkvZmXgACgkQ7R3zOzCoP9TDTwCgif7mfECp/31+fYq2RX/lkLca
rcgAnjxf1FYgfzIrYMy3PBHKB2I1CcW6
=z+Py
-----END PGP SIGNATURE-----