Many moons ago I converted a Compact5 to Mach3. I used a larger DC motor
on the tool changer with a cam operated switch on the back end of the
turret spindle to count tool positions. Tool changes took less than a
second. I have a video on YouTube, filmed with a mouldy potato
<https://www.youtube.com/watch?v=D4PrCejPbZ8>
You can just about make out the aluminium cam on the back of the turret
spindle. The Z axis stepper was replaced with a servo but the X axis
stepper was retained.
Les
On 09/01/2021 02:30, Gregg Eshelman via Emc-users wrote:
Look for emco cnc lathe compact 5 turret on YouTube and you'll see several
videos of it operating, stock and modified. Stock, they are pretty at changing
tools.This guy used EdingCNC and wrote a subroutine to operate the upgraded
stepper motor he put on the turret. Quite speedy changes. The original steppers
on the Compact 5 were just 75 steps rather than the typical 180.
"The Emco turret has a ratchet wheel and a pawl to keep the turretplate in
position.. i wrote the subroutine for the toolchange so that it rotates 4 degrees extra
to release the pawl, and then 10 degrees back to put the ratchet wheel firmly to the
pawl.. with this ratchet wheel.. the turret can only turn in one direction.. if you look
closely.. you can see the turret turning back a bit after a toolchange."
https://www.youtube.com/watch?v=bfIzuWAEZiw
Here's a demo of a stock standalone Compact 5 CNC lathe turret. Note it rotates
quite a bit farther past the tool position before backing up to lock, and the
rotation speed is slower. Crazy thing was programmed to be able to advance 6
positions, which runs it around 360 degrees back to the same tool. Why not have
it ignore commands for a 6 position change?
https://www.youtube.com/watch?v=-kNYLt6ne_w
'Tis a shame the Welturn and Welmill upgrades for the Emco standalone lathe and
mill are long out of production and nobody has bothered to clone or make lower
complexity functional equivalents with 21st century components.
On Friday, January 8, 2021, 5:07:36 AM MST, andy pugh <bodge...@gmail.com>
wrote:
On Fri, 8 Jan 2021 at 07:26, Andreas Linnarsson
<andreas.linnars...@gmail.com> wrote:
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