Wire EDM Machine Operation Chapter 12
Copyright November, 98 Page 12-4 Sodick Inc.
WORKTANK AND TABLE:
Use AC-500 or equivalent and spray down the tank and table and let sit for several
minutes. A toilet bowl brush works well for scrubing out the tank and a toothbrush for the
smaller areas.
If a small amount of acid is used, wipe up excess with a cloth.
If a large amount of acid is used, disconnect the large gray drain hose where it attaches to
the dielectric tank and put it in a bucket. When you rinse out the worktank, the water and
acid will go into the bucket and not the dielectric system.
AC500 is available from Rochester Midland (800.842.3919)
Use only an Arkansas stone on the table to remove nicks and scratches. If a fine India
stone is used, it will scratch the table and remove too much material.
WATER FILTERS:
The overflow in the dielectric tank should be the width of the opening and drop several
inches with the worktank empty. If not add water and if it is narrower, the filters are
getting clogged. Look at the pressure gage located on the top of the dielectric tank and
verify that it is not in the red zone. Using a white container, catch some of the water .It
should be visibly clean. If it is gray or slightly black the filters need to be replaced. Water
is constantly flowing through the filters and the filters catch any particle that is bigger
than what the filter is rated at. To replace the filters, turn the circulation pump off with
the chrome toggle switch located to the right of the resistivity meter. Unscrew the wing
nut and remove the metal cap, rubber washer and the brass washer and pull the old filter
up and throw it away. Verify that the o ring is located on the flange where the bottom of
the filter seats onto. CAUTION: The o-ring may stick to the bottom of the filter. The o-
ring must be in place for the filters to work properly.
CARBIDE POWER CONTACTS:
The carbide power feeders deliver the electricity to the wire thus charging it with current.
They need to be indexed when the witness line is about .010"-.015" deep or about every
70 or 80 hours. Sodick provides an indexing tool with the machine or a 6" scale could be
used to track location of the power feeder. Loosen the set screw (3mm allen wrench)
located inside the head of the cap screw that holds the short power cable to the front of
the upper head and push the feeder about .040" and retighten the screw. The lower head
also has the same style feeder, but the screw that holds it in place is located behind the
head (5mm allen wrench). Loosen it and index the feeder and retighten the screw. Once
the entire 1st surface of the feeder has lines on it, flip it over and use this entire 2nd side.
It is a good idea to clean the feeders every other time they are indexed. You must keep
track of which way the feeder is indexed so the wire is on a new area each time it is
indexed.
To Next Page
Loading...