Perfecta 115 TS - Knife Drive Malfunctions

Service Manual 2 Knife Drive
2.4 Knife drive malfunctions
1/09 PERFECTA 115 / 132 / 168 / 225 – TS 14
PERFECTA Schneidemaschinenwerk GmbH  D-02625 Bautzen  Schäfferstr. 44  Tel.: +49-3591-556-131 to -133  Fax: +49 3591-556-139
2.4 Knife drive malfunctions
The following trouble can occur in the knife drive assembly and will not be indicated
by the computer control system in the form of an error message.
• The main motor cannot be started
Remedy:
- Switch S56 for "manual cranking" (refer to the Operating Manual) under the fly-
wheel guard is locked. Unlock this switch.
- The flywheel guard is not properly closed. Turn in the lock screw until the safety
switch is closed.
- Fuses are defective. Replace the corresponding fuses.
• Cutting or clamping cannot be triggered
Remedy:
- The Main motor is OFF.
- One of the cut-release pushbuttons is defective. Change the pushbutton.
- The carbon brushes have no contact with the slip rings. Refer to "Clutch/brake
assembly maintenance".
- Refer to "Hydraulic clamping system malfunctions".
- The pedal is locked (S69).
- Y62 has no contact or is defective.
• Heavy jerking when the knife is reversing at its lower dead centre
Remedy:
- The overload expansion ring has come loose. Re-tighten the fixing bolt. Please
refer to "Knife Drive Anti-Rupture Device" in the Operating Manual.
- Very dull knives are often the cause for the overload expansion ring to respond.
Change the knife.
- The knife cut-through position has been set too low.