New Designed

Hydraulic Shearing Machine For Sale

Start from year 1982, leading hydraulic shearing machine manufacturing for 40 years.

  • Customized based on customer's practical use.
  • CE certified and 3 years warranty.
  • Timely after-sales service and support.

Common faults and troubleshooting of the guillotine shear

The main motor cannot be started #

Causes

  • Emergency stop switch off
  • 1QF1 switch off
  • Lack of phase
  • Hydraulic oil cannot be extracted

Solutions

  • Turn on the emergency stop switch
  • Close 1QF1 switch
  • Check the circuit
  • Check whether the filter is blocked

NCRDY is not displayed #

Causes

  • The start switch of CNC system is not started
  • X-axis, shear angle and clearance are not in place

Solutions

  • Press the NC system start switch
  • Press the hand wheel control key once, move the cursor to relevant positions respectively, check which of X, a and G is not in place, and analyze the cause.

The X-axis does not work properly #

Causes

  • Servo drive alarm
  • 1QF3 not closed
  • The power line or encoder line or servo motor fails

Solutions

  • Check the cause of the alarm (see remarks)
  • Close 1QF3
  • Check the wiring

The size of X-axis is 5mm and 10mm larger or smaller than the normal state #

Causes

The position finding is not accurate when returning to the reference point.

Solutions

  • Shut down and restart
  • Move the reference point sensor 1-2mm or adjust the sensing distance of the sensor

The blanking size is different from the actual programmed size #

Causes

  • Caused by artificial feeding
  • Rear stop movement of machine tool

Solutions

  • Refeeding and shearing
  • Corrected X reference point

The machine cannot go down #

Causes

  • Down valve stuck
  • No signal to downstream valve
  • No main pressure

Solutions

  • Check down valve
  • Check the control circuit
  • Check the main pressure valve

No main pressure #

Causes

  • Main motor not started
  • The main pressure valve is damaged or inoperative
  • PLC control circuit failure

Solutions

  • Start the main motor
  • Replace or clean the main pressure valve and check the control valve coil circuit
  • Check PLC controller

The slider does not drop after the foot switch is depressed #

Causes

  • The controller has no “ncrdy” signal
  • Loose line
  • PLC no signal output

Solutions

  • Check that there is no “ncrdy” reason
  • Check and connect relevant circuits according to the electrical schematic diagram
  • Check PLC controller

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