13
CAUTION
●
Do not use automatic feed when the workpiece
has a tapered bottom surface through which a
hole is to be drilled.
When putting a hole through workpiece with a
tapered bottom surface or bottom surface with a
radius, such as angle, channel, H-section steel,
etc., use low feed rate at the start as well as toward
the end of drilling operation where the likelihood of
tool chipping is high. (Fig.22)
R
Fig. 22
(9) Finishing Drilling Operation
WARNING
●
When drilling cycle is complete, the Drill Motor
will stop automatically. If it does not, it is a
machine failure. Turn off the Motor Switch and
contact sales agent through which you have
purchase your machine or an authorized dealer
near you for repair.
●
Be alert at the end of drilling operation when
slug will automatically pop out. Do not touch
slug: it is very hot and has sharp edges.
When drilling cycle is complete, the Drill Motor will
come to a complete stop automatically. Once it
has come to a stop, pull the Rod Handle outward
away from the machine and turn off the automatic
feed switch. Turn the Rod Handle clockwise to raise
the Drill Motor. Then promptly turn off the Magnet
Switch. If a Magnet is left alone with its switch
turned on for many hours, electric current will keep
flowing
through the Magnet at the cost of shortened
service life.
(10) Removing Slug
Do not proceed to the next operation without
removing the slug from the operation just
finished.
At the end of drilling operation slug will pop out
automatically ejected by the spring-operated Pilot
Pin. Should a slug left in the hold sticking, remove it
from the hole by tapping the collar of the slug with a
needle stick or something. (Fig.23)
Fig. 23
6-3. Drilling Oblong Hole
CAUTION
●
Always drill oblong hole manually and slowly.
Drill oblong hole in the order of
①
,
②
,
③
. For the
steps
②
and
③
, use manual feed and take care so
that the cutter may not be fed into the workpiece with
too much force. If automatic feed is used, damage to
the cutter or unexpected accident may result. Use a
file
to take off any sock that is left unmachined.
Spacing between each step of drilling operations
should be so arranged that the Pilot Pin will always hit
the sold material yet to be machined. (Fig.24)
Fig. 24
6-4. Drilling Stacked Plates
CAUTION
●
Remove slug as each plated is finished:
otherwise, being blocked by the slug left
unremoved, the cutter cannot cut into the next
layer of plate, which results in the Magnet base
being pushed up possibly causing accident.
●
For stacked plates drilling, always use manual
feed and drill slowly and carefully.
●
Before drilling stacked plates, securely clamp
the plates together in place.
●
When drilling stacked plates, retract the cutter as
each layer of plate is
finished
in order to remove
slug from the drilling area, then put another hole
in the next layer of plate.
File away any excesses
Summary of Contents for ATRA ACE WA-3500
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