Choppers

Caution: Always wear proper safety equipment (glasses, gloves, respirator, etc.) when working on spray equipment.

• Problem Glass binds up.
  • Possible Causes: Obstruction in roving path.
    Solution: Trace roving path from source to chopper for any obstructions
    and fix as necessary
    
  • Possible Causes: Improper anvil sleeve to bearing tension.
    Solution: Adjust as necessary.
  • Possible Causes: Improper cutter head to anvil sleeve tension.
    Solution: Adjust as necessary.
  • Possible Causes: Resin on roving.
    Solution: Clean as necessary, keep roving away from resin and overspray.
  • Possible Causes: Worn cutter wheel.
    Solution: Replace.
  • Possible Causes: Open slots in cutter wheel.
    Solution: Be sure all blade slots are filled with a retainer bar and spacer
    (whether a blade is inserted or not).
    
  • Possible Causes: Worn or broken blades.
    Solution: Replace.
• Problem Cutter not shutting off.
  • Possible Causes: Stuck chopper poppet valve.
    Solution: Replace and lubricate o-ring on chopper poppet valve in gun.
  • Possible Causes: Worn poppet valve seat.
    Solution: Replace.
  • Possible Causes: Broken poppet valve spring.
    Solution: Replace.
• Problem Cutter does not come off.
  • Possible Causes: Sticking resin needle prohibiting actuation of poppet valve.
    Solution: Replace packings.
  • Possible Causes: Bent trigger.
    Solution: Replace.
  • Possible Causes: Stuck poppet valve.
    Solution: Clean, replace, and lubricate seals.
• Problem Improper chop length.
  • Possible Causes: Worn or misadjusted anvil sleeve.
    Solution: Replace or adjust properly.
  • Possible Causes: Worn blades.
    Solution: Replace blades.
• Problem Cutter running too slow.
  • Possible Causes: Tension on anvil sleeve to bearing or cutter head too tight.
    Solution: Adjust as necessary.
  • Possible Causes: Low air volume.
    Solution: Inspect hoses for kinds or cuts.
    Inspect primary air line to system for proper diameter and
    volume.
    Call M.V.P. at 727.573.2955 to discuss or email us at
    ctechserv...@mvpind.com.
    
  • Possible Causes: Worn air motor.
    Solution: Replace or rebuild.
  • Possible Causes: "Dry" air motor.
    Solution: Oil air motor daily with 3-5 drops of Magnum AMO air motor oil.
  • Possible Causes: Chopper poppet in gun sticking.
    Solution: Remove, replace o-rings and lubricate.
    Check for broken poppet spring and replace if necessary.
    
• Problem Cutter not running.
  • Possible Causes: Chopper poppet stuck in closed position.
    Solution: Clean, replace o-rings if necessary and lubricate.
  • Possible Causes: Air motor "locked-up".
    Solution: Rebuild or replace air motor.