38294 Pelton Rd. Willoughby, OH 44094
Phone: (440) 918-1701 Fax: (440) 918-1720
 
 

Press Trouble Shooting Guide

 

 

1) Hydraulic pump will not start:

Reset light curtain (If installed)
Check that the three Emergency Stop switches are released
Check that the control power is on (120 VAC ON Lamp), on newer presses this lamp is blue, press the blue lens to turn on control power
Check overload relay on hydraulic motor starter and reset if required


2) Press will not move:

Hydraulic pump must be running
Gates & guards must be closed and switches activated
Light Curtain (If installed) must be reset, and not blocked, indicated by green light on
If no light curtain is installed or is Bypassed; two cycle start buttons or Top Cycle Start and an applicable function button must be pressed
Output enable switch must be on (If installed)
Top platen must be locked
Hydraulic oil must be full and not over temperature (Fault light on steady) unless in Set-up mode

 

3) Clamp will not open:

General
See items 1 & 2 above
Pressure column must be out and proximity switch made
Check the clamp open position on the Clamp Setup Screen, Clamp must be above (less than) the open position to move down
Must use Inch Open and Top Cycle Start pushbuttons without light curtain
Semi-Auto Mode
If the machine has Light Curtains and they are manually disabled, you must use the Top Cycle Start and Inch Open pushbuttons to open the clamp
If Cycle Stop switch is on (Illuminated at the end of the cycle) you must use the Inch Open (and Top Cycle Start, if Light Curtain is not installed or active) pushbutton(s)


4) Clamp will not close:

General
See items 1 & 2 above
Pressure column must be out and proximity switch made
Pressure column "In" Proximity switch must not be made
If equipped, Mold core shuttle must be in and proximity switch must be made
If Equipped, Top Ejectors must at or above the "Up" position as set
If using the Top and Bottom Cycle Start Pushbuttons they must be pressed simultaneously
Check the Clamp Set-Up screen and check the Clamp Pressure and flow values
Semi-Auto mode
Mold must be fully open, see clamp setup screen
If equipped with light curtains, the parts must be removed, or the light curtains broken between cycles
If Purge Limit is greater than zero, you must first purge the inject to close the clamp


5) Pressure Column will not move in:

See items 1 & 2 above
Hydralock Selector switch must be on
Hold the Cycle Start Switch(es) until the pressure column move in
Hydralock must be collapsed and collapsed proximity switch must be on
Clamp must be at or above "Closed" position as set on Clamp Set-Up Screen
In Semi-Auto Mode the inject barrel must be full to the preset volume to enter the cycle


6) Pressure Column will not move out:

See items 1 & 2 above
Hold the Cycle Start Switch(es) until the pressure column move in
Hydralock must be collapsed and collapsed proximity switch must be on
Clamp must be at or above "Closed" position as set on Clamp Set-Up Screen
In Semi-Auto Mode the inject barrel must be full to the preset volume to enter the cycle
If Cycle Stop switch is on (Illuminated at the end of the cycle) you must use Inch Open and, (If light curtain option is not installed), the Top Cycle Start pushbuttons
On older presses: If the light curtain is disabled, then on the first cycle after selecting Semi-Auto Mode you must manually open the press as if the Cycle Stop were engaged (see above)


7) Pressure column hits the clamp while moving in:

After changing a mold always turn the Hydralock Selector "off"
Check and adjust the "Mold Closed Position" on the Clamp Set-Up Screen
Visually check the adjustment of the Hydralock spacers and/or the Hydralock adjustment screw, adjust as applicable
Disconnect the Pressure Column In proximity switch
Turn the Hydralock Selector "On"
Raise the clamp, and observe that the pressure column comes in when the clamp reaches the closed position
Check that the gap does not exceed 1/4", adjust as required
Retract the pressure column
Re-connect the Pressure Column in proximity switch
WARNING: Do not allow the Hydralock to extend more than 5/8" or damage will result


8) Hydralock will not collapse:

Check that the guards and light curtain (if equipped) are closed and made
Check that the Output Enable switch (if equipped) is on
Check to see if the Cycle Stop Switch is on and illuminated


9) Hydralock will not expand:

Hydralock speed or pressure set too low on Clamp Set-Up screen
If Inject Transfer Mode is on, Hydralock will not expand until Inject and Dwell are done
Hydralock pressure switch is already on, or analog pressure sensor is indicating set pressure
The pressure column must be in and both proximity switches must be made
Hold the Cycle Start Pushbutton(s) until the Hydralock expands

 

10) Hydralock will not stop expanding:

Hydralock speed or pressure set too low on Clamp Set-Up Screen
In Inject Transfer Mode the Hydralock will continue to expand until the "Transfer Time" set on the Auxiliary Options Screen has expired
The Hydralock pressure as set on the Clamp Set-Up Screen is below the set point of the Hydralock Pressure Switch or the Hydralock Pressure Transducer, raise the Hydralock pressure


11) Inject plunger will not move forward:

The Screw Lifting Arm must be down and the Screw Arm Down Proximity switch must be on
Screw motor must be off and/or Inject volume must be full before auto injecting
Mold is not in the "closed" position
Inject set volume must be more than zero
Hydralock collapsed proximity switch must be off
Hydralock Safety proximity switch must be off
The Pressure column must be in and the two proximity switches must be made
The Hydralock pressure as set on the Clamp Set-Up Screen is below the set point of the Hydralock Pressure Switch or the Hydralock Pressure Transducer, raise the Hydralock pressure
The Hydralock pressure as set on the Clamp Set-Up Screen is above the set point of the Hydralock Pressure Switch or the Hydralock Pressure Transducer, raise the Hydralock pressure or correct the overpressure condition, check for double-inject
For Automatic injection the Semi-Auto mode must be selected
If the press is not in Inject Transfer Mode the Hydralock Pressure set point must be satisfied before injection will start
Check the 1st stage inject pressure and speed
If the 2nd stage inject volume is not zero then check the 2nd stage inject pressure and speed
If no light curtain is installed or it is manually disabled the Bottom Cycle Start and the Manual Inject pushbuttons must be used
If a vacuum time has been set on the Auxiliary Options Screen, injection will not start until the vacuum time has expired
The Purge Inject (Manual Inject) pushbutton will only work when the Clamp is in the Open position
If the Purge Limit on the Main Operation Screen is not zero, the Purge Inject Pushbutton will be disabled after the preset volume is purged and will not be enabled until the next cycle or the mode is changed to Setup

 

12) Inject plunger will not retract:

Mode selector must be in Setup mode
The Screw Lifting Arm must be down and the Screw Arm Down Proximity switch must be on
Pressure and flow may be too low to move the plunger, try adjusting the manual System Pressure and System Flow controls while holding the Plunger Retract Pushbutton


13) Screw motor will not run:

Inject volume is above the set point
Inject volume is above the maximum volume
Feed port alarm is active, no stock in feeder (Screw motor will run for 10 sec. each time the Jog Screw is pressed in Semi-Auto)
With the Screw in the normal position, the Screw Arm Down and the Jog Safety Proximity switches must be made
With the Screw in the clean-out (or lifted) position, the Screw Arm Down and the Jog Safety Proximity switches must not be made
Screw set speed too slow
Screw temperature too cold for rubber compound
In Semi-Auto with the Screw Reload switch on and with the screw start option on the Auxiliary Options Screen set to "Screw Start After Inject", the screw should start after the Dwell Timer finishes, the Screw Delay Timer Finishes and the Cure Timer Starts.


14) Screw motor runs continuously (or until barrel is full):

With the Screw in the normal position, the Screw Arm Down and the Jog Safety Proximity switches must be made


15) Top Platen will not move up:

Gates & guards must be closed and switches activated
Light Curtain (If installed) must be reset, and not blocked, indicated by green light on
Press must be in Set-Up Mode
Select the Top Platen Up, if Light Curtain is not installed, also press the Bottom Cycle Start Pushbutton


16) Top Platen will not move down:

Gates & guards must be closed and switches activated
Light Curtain (If installed) must be reset, and not blocked, indicated by green light on
Press must be in Set-Up Mode
If equipped with Hydraulic Top Platen Locks, select Unlock Top Platen, light should blink when locks have retracted
Check the Top Platen Unlocked proximity switch
With manual Top Platen Locks, pull locking bar completely out
Select the Top Platen Down, if Light Curtain is not installed, also press the Bottom Cycle Start Pushbutton


For any problems not listed, please contact the Service Department at:

 
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