Challenge EH-3C, Руководство по эксплуатации

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3-3
F.352-KO/EH-3C DRILL/AUG 03
3.0 ACCESSORIES
This optional backgauge assembly provides additional
versatility to the EH-3C. The automatic trip on the side
guide permits step and repeat type of operation with a
minimum distance between holes of
3 /
8
” (9.5 mm) with
the standard stops or 1 /
4
” (6.3 mm) minimum by the
use of a fixed gage, available as optional equipment.
As each set of holes is drilled, the side guide is auto-
matically tripped, and as soon as the drills clear the
stock on their up stroke, the guide is free to move to its
next stop. This is accomplished by pushing the stock
to the left and moving the guide at the same time. When
drilling one, two or three holes only, that fall within the
9” (23 cm) limitations of the machine, the automatic
trip bracket (located at the left of the machine) can be
turned so that it does not engage the trip lever.
3.7.1 Setting the side guide stops
First set the rear gage to the desired back margin. Be
sure both sides are set to the same dimension and
tighten the two thumbscrews. Next, remove the guide
shaft and set the guide stops to the desired distance
between holes (a scale in the guide shaft is provided for
this purpose). The guide shaft is then replace in the
rear gage and final adjusting or centering of holes is
accomplished with the knurled screw at the extreme
left end of the guide shaft.
The automatic trip gage comes equipped with seven
stops. Additional stops can be purchased at a very
nominal price. Challenge fixed index gages are recom-
mended where the same job is to be handled over and
over again. They are easily and quickly attached and
removed. NOTE: When drilling narrow strips, the side
guide roller assembly should be mounted on the inside
of the side guide assembly.
3.6 RIGHT-SIDE SIDEGUIDE KIT
Cat. No. K-5731
This kit includes all of the parts and hardware neces-
sary to add a right-hand sideguide to your existing
backguage. When used in conjunction with the left-
hand sideguide, multiple hole patterns can be drilled by
shifting the stock from one sideguide to the other be-
tween drilling cycles.
3.7 AUTO-TRIP BACKGAUGE
Cat. No. A-4615-9