EC-3500 ML -2000, 4000 & 5000

Problem Checks
Machine will not start. Check display for error message
Check disconnect.
Is feed selector in retract. Is stroker selector in automatic?
Is foot pedal cover in place?
   
Stones will not feed out. Check spindle nose alignment
Check feed pressure should be above 1.6.
Check wedge hook for free movement.
Check bushing in spindle for burrs.
   
Initial diameter knob does not change where feed regulator stops. Damper assembly low on oil.
Check balls in damper assembly may be lodge in seats.
Clean and add new oil
   
No coolant flow. Check coolant level.
Check flow valves are open.
Check overload in main electrical panel.
Check voltage at pump.
   
Cycle does not stop at zero. Check LVDT for correct position.
Check LVDT for sticking or binding. Make sure honing indicator needle is
at zero with power off.
 
Machine stops and powers down 
at the end or middle of a cycle
Check for drive faults. 
Check spindle and stroker belt tension.
 
Spindle or stroker coast to a stop. Check brake resistors
   
Stroke length changing. Check stroke length clamp handle for tightness.
Check pin height in bottom clamp assembly.
Check stroker pivot free play.
Reduce stroker speed.
Reduce feed force.
 
Spindle will not hold alignment. Check bearings in spindle.
Check fixture alignment.
Check spindle temperature. (max. 145F)
   
Switches on operator panel not working correctly. Check contacts for switch.
Check input/output voltage from
switch.
   
Feed system will not change from
rough to finish.
Check air pressure at air regulator.
Check solenoid valve.
Check air flow control valve.
Check air cylinder.
Feed system will not change from 
expand to retract.
Check air pressure at air regulator.
Check solenoid valve.
Check air flow control valve.
Check air cylinder.
Latch and unlatch does not change. Check air pressure at air regulator.
Check solenoid valve.
Check air flow control valve.
Check air cylinder.
Check belt tension.
Check push button valve.
Make sure EC2776 link is in slot.
Check that compensator gear is engage in rack.
 
Stonewear compensator not working. Check air pressure at air regulator.
Check solenoid valve.
Check air flow control valve.
Check air cylinder.
Check belt tension.
Check push button valve.
Make sure EC2776 link is in slot.
Check that compensator gear is engage in rack.
 
Feed dial is loose, moves forward and reverse very easily. Check tension on drag wheel. 
Check 2 clamp collars for tightness.
Check clutch bearing in clutch housing.
Check spring in spring housing.
   
Machine knocks during cycle. Check to make sure the carriage or fixture is not hitting anything.
Check stroker pivot freeplay.
Check stroke position lock for tightness.
Check that stroker driveshaft assembly is not hitting rear frame casting.
Check connecting rod assembly.
Check spindle and stroker pulley alignment.
 
Stroke length adjustment handwheel does not stroke length.
Check belt tension.
Check pulley alignment.
Make sure handwheel is tight on pulley shaft.
Make sure 2 rods are tight.



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