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3.5.4. Joining
The joint faces must be barely moving when brought into contact with each
other. The contact pressure should be uniformly increased to 0.15 N/mm²
(DVS 2207, Part 1) and must be maintained during the cooling-off period
(Fig. 14, column 5). The contact lever is secured with the clamping lever/knob
(37) during the cooling-off period. The requisite pressure, as described un-
der 3.5.1., should be taken from the tables in Figs. 9-13. After the joint has
been completed, a uniform, double bulge must have formed around the en-
tire circumference. The shape of the bulge gives an initial indication as to
the uniformity of the weld. Dimension K of the bulge (Fig. 15) must always
be greater than 0, i.e. the bulge must project beyond the circumference of
the pipe all round.
3.5.5. Releasing the welded pipe
At the conclusion of the cooling-off period, the clamping lever/knob (39), by
which the contact lever is secured, must be released before the clamps are
opened, so that the contact pressure can be slowly relieved without adverse-
ly affecting the welded seam. The clamping cams (35) can then be opened
and the welded pipe removed from the machine. Allow the welded seam to
cool naturally, i.e. do not accelerate the cooling process with water, cold air
or similar. For stress loading capacities, see the manufacturer's information
on pipes and mouldings.
4. Maintenance
Before undertaking any maintenance or repairs, disconnect the machine from the
mains. Operations of this nature must not be carried out other than by qualified,
trained personnel.
4.1. Maintenance
REMS SSM machines are entirely maintenance-free. The gear of the elec-
tric facing cutter runs in a sealed grease housing and therefore does not
need any lubrication.
4.2. lnspection/repairs
The anti-adhesive coating on the heating element must be cleaned with non-
adherent paper or a non-fraying cloth and spirit or industrial alcohol before
each welding process. Any remnants of plastic adhering to the heating unit
must be cleaned off in the same way. In this process, take care to ensure
that the anti-adhesive coating on the heating element is not damaged by
tools.
The facing cutter motor is equipped with carbon brushes. These are subject
to wear and must therefore be inspected and/or replaced from time to time.
For this purpose, loosen the four screws on the motor cap (40) approx. 3
mm, pull the cap to rear and remove the two covers from the motor housing.
lf the facing cutter drive belt becomes slack after a prolonged period of use,
it must be retensioned. To do this, loosen the stud in the housing to the le-
vel of the motor spindle and slightly turn the clamping cam with motor in a
clockwise direction. Now re-secure the clamping cam with the stud.
lf the machine is subject to severe contamination, the mounting bars for the
sliding block, heating element and facing cutter must be cleaned and re-
greased from time to time.
5. Wiring Diagram
Butt welding unit see Fig. 16.
Electric facing cutter see Fig. 17.
6. Action in Case of Trouble
6.1.Trouble
Butt welding unit does not heat
Cause
·
Butt welding unit is not plugged in
·
Mains lead is defective
·
Mains socket is defective
·
Unit is defective
6.2. Trouble
Plastic remnants stick onto the heating element
Cause
·
Heating element is dirty (see 4.2.)
·
Anti-adhesive coating is damaged
6.3. Trouble
Electric facing cutter does not run
Cause
·
Facing cutter is not in operating position (limit switch)
·
Mains lead is defective
·
Mains socket is defective
·
Unit is defective
6.4. Trouble
Facing cutter stops or no clean surfaces through facing
Cause
·
Excessive forward feed
·
Dull cutter blades
·
V-belt slips (see 4.2.)
6.5. Trouble
Clamped pipes do not align
Cause
·
Adjustment of clamps is out of position (see 3.2.)
7. Guarantee Conditions
For improper used and subsequently damaged PTFE-coatings of the heating tool
no guarantee will be granted.
All REMS machines, power drives and hand tools are guaranteed for 6 months
from the date of sale to the enduser, however not exceeding 12 months after sale
to the dealer. The date of sale has to be proven through sales documents. Any
faults that are attributable during the guarantee period and are in our reasonable
opinion proven defects in workmanship or material will be repaired at no charge.
Defects which are traceable to normal wear and tear, misuse or abuse, unsuitable
working materials, use for purposes other than originally intended and own or
outside interference which REMS is not liable for, are excluded from the guaran-
tee. Guarantee services are exclusively handled through authorized service sta-
tions. Claims are only accepted when the item in question arrives without prior
interference in the relevant REMS service station.
Both forward and return freight for any item returned under this guarantee is pay-
able by the enduser.
P.S.: Various figures and statements in this operating manual are taken from the
DVS directions 220 and 2208 (DVS: German Association of Welding Technolo-
gy, Düsseldorf).
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