FILENAMES:

shcab.jpg
shcnc.jpg
shnew.jpg
shzaxis.jpg
shzoom.jpg

DESCRIPTION:

Pictures of a Sherline CNC conversion. Posted by Richard 
Everett (everett@oz.net).

Richard provided the following description:

>Here are some pictures from my sherline cnc conversion.  This is 
>the first conversion I have done for a sherline mill.  The total
>cost of everything except the mill itself was under $200.  The motor
>for the z axis is rated at 85 oz/in holding torque, while the x and
>y axis motors are 65 oz-in.  These were surplus used at $5 each.  The
>controller is a bipolar chopper drive current limited, 2 amp per phase,
>40 volt drive using the L297/L298 chipset.  This is an excellent low-cost
>solution for small to medium size steppers.  Dan Mauch has a NICE kit
>using this chipset that controls three motors and has a parallel port
>connector built on the board too.  I would highly recommend his driver kit.
>(Currently priced at $150, I believe).  I toured his shop the other day
>and was very impressed he could turn out such nice products and still
>be able to price them very reasonably.
>
>The pic "shnew" shows some of the more expensive/higher torque/pretty
>parts I will now use on the mill.  These new parts will bring the
>conversion cost to around $500.  The motors are PacSci PowerMax series
>195 oz-in double shaft with flats.  They are priced new from a local
>PacSci distributor for $76 each.
>
>The pic "shcab" shows the cabinet I purchased from Boeing Surplus.  It came
>with a huge outdated laser printer on top, which I pulled some motors from
>and then junked.  Perfect roll around stand for the mill.  I also used the
>laser printer controller box as the housing for my stepper motor power supply
>and driver boards (pictured on the top shelf of the cabinet).  Pretty good 
>for $25, ya think?  And Jim Harvey doesn't like recycling tools and such!
>;)
>
>Richard