GBC Docuseal 2700, Руководство по обслуживанию

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5.0 TROUBLESHOOTING
5.4 Theory of Operation
This laminator uses heat, roller pressure and film tension to continuously apply adhesive coated
laminating film to both sides of sheet type materials simultaneously. Electrical and mechanical
properties of this machine are described in this manual. A basic understanding of the theory of
lamination is required to service this laminator.
5.5 Theory of Lamination
The product being laminated should be receptive to, and capable of attaining a good bond with
molten polyethylene adhesives.
Most paper products can be laminated with a high degree of success. This is because molten
polyethylene adhesive bonds to individual fibers of the paper surface.The rougher the surface
texture, the more fibers are exposed to adhesive and the better the bond between adhesive and
product. Inks and other printing products affect this bond. While good adhesion occurs between
most inks and molten adhesive, poor adhesion may exist between some inks and the paper when
laminated. Some ink products are heat sensitive and/or lack the ability to be bonded using
thermal lamination.
Some paper and card stocks are coated with silicones, wax or varnish which inhibit the ability of
molten adhesives to stick tightly to individual paper fibers. In such cases a superficial bond
develops which may or may not be adequate, depending upon the intended use of the finished
laminate.
Smooth surfaces such as photographic, metallic and plastic are difficult to laminate, since no
fibers are exposed for the adhesive to contact. Materials such as these may require an alternate
method of lamination.
Products containing moisture will not laminate well. The moisture coverts to steam and forms
bubbles in the lamination.
5.6 Heater Circuit
The GBC 2700/3100 is a Heat Shoe type laminator that operates at a fixed temperature. The heat
shoes are heated by two infrared, rod type heaters that are slid into the shoes. A heat sensor
mounted on the lower heat shoe monitors the temperature which is controlled by the Main PCB.
A ready indicator on the control panel will illuminate when the laminator reaches operating
temperature. A Thermal cutoff is mounted to a bracket on the lower heat shoe and protects the
laminator from a runaway overheat condition. If the laminator is left idle for more than two hours
it will shut down. The power switch must be turned off then on to reset. The Main PCB must be
calibrated when replaced. See section 6.0 Adjustments for calibration procedures.
5. 7 Motor Circuit
Power is supplied to the motor circuit when the "Run" button on the control panel is pressed. To
stop the rollers the button is pressed a second time. The speed control knob on the control panel
will vary the speed of the rollers by increasing/decreasing voltage to the DC motor. The circuit is
protected by a 3.6 amp fuse.