Specifications

In order to ensure the stitches are loaded, driven and clinched properly in addition to ensuring
continuous operation of the G20 style heads, it is important that the wire leaves the Cutter Block
Assembly (G20597BA) in a straight horizontal line. Wire straightness is the single biggest factor for
ensuring good stitches and stitcher head reliability. Although straightness is set at the factory, every
roll of wire has varying degrees of twist which make it necessary for the user to properly straighten
the wire prior to production as well as during normal production. Follow the steps for
straightening wire listed below.
Horizontal Adjustment
Slide the Wire Holder Retaining Spring (G20583)
over to the side and remove the Wire Holder Assembly
(G20559BA or G20659A) from the Stitcher Head.
Make sure the Small and Large Feed Gears are
engaged. Activate the stitcher and observe the feeding
of the wire from the Cutter Block Assembly and take
note of the direction the wire is moving. Turn the Wire
Straightener Nut (G20621) in the Cutter Block
Assembly to adjust the wire. If the wire is feeding
upwards, turn the Wire Straightener Nut clockwise. If
the wire is feeding downward, turn the Nut counter-
clockwise.
Front-to-Back Adjustment
If the Left or Right Wire Guide Bars (G20541 or
G20542) are not properly positioned, the wire will rub
against them as it exits the Cutter Block. Look at the
G20 Head from the side, past both the Right and Left Wire Guide Bars. Make sure there is a clear
view of the opening in the Fixed Wire Cutter (G20600). If there is not, loosen the Flat Head Machine
Screws (G20579 and G20614) securing the Wire Guide Bars to the Wire Holder Pivot Block (G20543
or G20643) and move them out of the path of the wire. Tighten the Screws after making sure the Wire
Guide Bars are even with each other. Replace the Wire Holder and
re-engage the Wire Holder Retaining Spring. Load a piece of wire into the
Wire Holder. Using a mirror, check to make sure the wire in the Wire
Holder is lined up with the grooves in the two (2) Bender Inserts*. If it is
not, loosen the Socket Head Set Screw (G20273) in the front of the Wire
Holder and the Hex Nut (G20226) securing the Wire Holder Eccentric
Screw (G20665). Turn the Eccentric Screw until the wire is aligned with
the grooves in the Inserts. Tighten the Hex Nut and Set Screw to secure this
setting. Remove the wire in the Wire Holder and load another piece in the
Stitcher Head. Verify that the setting established is accurate with this piece
of wire.
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Wire Straightening (Figure 7)
Figure 7 - Straightening the Wire
G20559BA
or G20659A
G20583
G20600
G20621
G20621
Bender
Insert
grooves
* A complete parts listing can be found on page 47