Insert a 1/8” calibration blank into the IBS/E (Figure
20). You may also use one of the small bits included with
the IBS/E kit. Insert the ISB/E into the mounts (Figure 21).
The mount was designed to hold the ISB/E with the front
(knob) of the tool facing right or left as shown. This will
allow you to access both the spindle lock and the speed
knob. Tighten the spindle clamping nuts (1” machine
screws in front) on both mount clamps. Tighten the nuts
holding the lower mount clamp in place.
Place a small square on the table and move the spindle
until the bit is up against the square as shown in Figure 22.
If the bit is not fully against the edge of the square, twist
the whole spindle mount assembly clockwise or counter-clockwise until it is. Tighten the upper mount clamp nuts
(Step 4) and the lower back plate nuts (Step 3).
Move the X axis to the left and place the square
against the bit as in Figure 23. Check to see if the square is
flat against the bit. Move the X axis to the right and
place the square against the bit as shown in Figure 24.
If the square does not mate with the length of the
bit, you may need to adjust the upper shaft (Figure 25)
forward or backward to
correct this issue. Adjust
one side, then the other as
needed. Once adjusted,
repeat this step until the
square is flush with the bit
on both sides of the CNC.
This completes the
spindle hookup. I will post
the drawing files for the
IBS/E spindle mount on my
support page for the KReduCNC. I will
also post the drawing files for the
There are other spindle options
that I have used with success on the KReduCNC. Figure 26
shows the spindle from a Foredom flex shaft. Since the
heavy motor is mounted at the other end of a flex shaft,
you can pack a great deal of cutting power at your
disposal. It will accept 1/8” and 1/4” bits. While it uses the
same mounts as the Wecheer WE248, the one shown in
Figure 26 is a version that has a dust shoe that connects to
I wrapped all my wires, cables, and cords with some
split loom tubing (Figure 27). This protects the wires and
cables, and gives your machine a better look.
Next month, I will conclude this series by testing the
spindle and milling a couple parts. Check out the video here
showing when I made the first cuts of the IBS/E spindle:
SERVO 02.2017 43
For any questions or comments, please visit the SERVO Magazine forums
at http://forum.nutsvolts.com / viewtopic.php?f= 49&t=17408.