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Drytac HOT PRESS HGP260 にも：取扱説明書 (19 ページ)

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HOT PRESS USERS MANUAL

ACUUM

ROUBLESHOOTING

The vacuum gauge should indicate approximately 25" of

mercury during normal operation. If the reading is too low, or

the press takes a long time to "pull a vacuum", check for one

or more of the following common problems:

1. Foam or other materials trapped in the seal: It is very

easy for the foam overlay blanket to become misplaced and

inadvertently become trapped in the seal. This will allow air

to leak in, preventing a good vacuum from forming. Foam

used in the press will tend to expand over time. As this

happens, you should lay it on the bench and trim a strip off

each edge. Also check for paper, canvas or other materials

that may be stuck to the lid and interfering with the seal.

2. Press is not level: If all four corners of the press are not

level, it may be difﬁ cult to achieve a proper vacuum. Use

a carpenter's (bubble) level to verify. If one corner is out

of alignment, use shims under the press as necessary to

correct.

3. Misalignment of press lid: To verify this, do the "bookmark" test.

Cut thin strips of paper and place at different sections of the seal all the

way around the press. Close the lid and secure the latches, then try

to remove the paper strips. The paper will normally be held tight. If the

paper can be pulled out, this will indicate there is a gap between the

seal and the lid of the press.

Normally, this can be resolved by adjustment of the hinges at the rear

of the press. Refer to the Routine Maintenance section on page 14 for

the procedure.

A gap at the front of the press may also indicate that the latches need to

be adjusted. The latches should snap shut with a ﬁ rm "click" but should

not be difﬁ cult to close. If they are too loose, follow the adjustment

procedure in the maintenance section. Do not overtighten the latches,

as this will cause them to wear out prematurely and will not improve

the vacuum.

4. Diaphragm has split or has been cut: Inspect the diaphragm

carefully for holes, particularly around the edges and in the corners.

Small holes can be repaired with a bicycle tube repair kit. (Apply the

patch to the bottom of the diaphragm.) If necessary, the diaphragm can

be removed from the press for inspection. Be sure to disconnect the

press from the power source before taking the diaphragm out.

5. Internal vacuum leakage: Put your thumb over the hole in the rear

corner of the diaphragm and observe the reading on the vacuum gauge.

If the reading is still too low, check the following:

a. Check that all vacuum hose connections are tight.

b. Check the pump ﬁ lter for blockage. Ensure the pump is off, then

unscrew the ﬁ lter bowl, pull the ﬁ lter cartridge out and reﬁ t the bowl. If

this ﬁ xes the problem, the ﬁ lter element will need cleaning. Unscrew

the retaining plate at the bottom of the cartridge and withdraw the ﬁ lter

element, wash in household detergent and re-assemble.

Note: The HPG560 has two vacuum inlets, one in each corner.

Illustration 15A: "Bookmark" test

Illustration 15B: Tugging on each strip

to determine vacuum seal.

Illustration 15C: Checking for internal

vacuum leakage.

Troubleshooting