3. Depending on whether the tool holder releases or not, do one
of the following:
l
If the Tool Holder Releases
Tighten the Power Drawbar
in quarter-turn increments with two adjustable wrenches.
After each turn, push the Release Tool button. Stop when
the tool holder does not release. Then, loosen the Power
Drawbar one quarter-turn with two adjustable wrenches.
l
If the Tool Holder Doesn't Release
Loosen the Power
Drawbar in quarter-turn increments with two adjustable
wrenches while pushing the Release Tool button. Stop
when the tool holder releases.
4. Make a visual reference to help you set or adjust the drawbar
tension in the future: use a paint pen to make a witness mark
on both the head of the drawbar and the end of the spindle.
About Drawbar Tension
While machining, the Tormach Tooling System (TTS) collet holds a
Tormach Tooling System (TTS) tool holder in the spindle by applying
a clamping force to both the shank and the shoulder of the tool. The
tension force that is applied to the drawbar pulls the Tormach
Tooling System (TTS) collet into the spindle taper, which then
applies the clamping force to the Tormach Tooling System (TTS)
tool.
The force on the drawbar — known as drawbar tension — is applied
differently depending on the tool changing method:
l
Automatic (using the Power Drawbar)
Tension is applied
by the compressed spring washers.
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Manual
Tension is applied when you tighten the drawbar into
the collet using a wrench.
Adjust the Initial Setup
In this adjustment, you'll verify that there's enough clearance
between the end of the drawbar and the Power Drawbar cylinder.
NOTICE!
If you don't do this adjustment, there's a risk that the
drawbar can loosen, or that operations can be louder than
normal.
1. Examine the space between the hex head screw on the Power
Drawbar cylinder's rod and the top of the drawbar.
Figure 2-42: Correctly spaced drawbar and Power Drawbar
cylinder.
2. Verify that the gap is between 3/64 in. and 1/8 in. (1 mm and
3 mm). Depending on the size of the gap, do one of the
following:
l
Between 3/64 in. and 1/8 in. (1 mm and 3 mm)
You
have completed adjusting the initial setup. Go to
l
Less Than 3/64 in. (1 mm)
Go to Step 3.
3. Disconnect the shop's air supply from the Power Drawbar
button.
4. Pull out the quick-release pin.
5. Pivot the Power Drawbar cylinder assembly to the left so that
you can access the Power Drawbar cylinder's rod.
Figure 2-43: Power Drawbar cylinder pivoted to the left.
Page 15
©Tormach® 2019
Specifications subject to change without notice.
tormach.com
TD10559: Owner's Guide: M ATC Retrofit for PCNC 1100 Series 3 (1119A)
TECHNICAL DOCUMENT
