How to Adjust the Mechanicalzero Point of EJ/GC

How to adjust the mechanicalzero point of EJ/GC

The mechanical zero point of EJ/GC may be deviated from its original position when power

supplyis recovered from power failure or when the power supply is turned ON, in the case EJ/GC

generated positional gap but the machine is started running before identifying and correcting it.

Though the adjustment procedure of mechanical zero point of EJ/GC is described in the Instruction Manual(Chapter 15), this section describes the procedures to adjust it generally without using any

special tools such as depth micrometer which may not be ready for local engineer.

Readjust it according to the following <Procedures>

Necessary tools

・19mm Spanner

（hex-spanner is set in a standard tool kit, but it is better to use bi-hexagon ring spanner）

・24mm Spanner （bi-hexagon ring wrench is set in a standard tool kit.）

・Plate: diameter 25mm, thickness 2±0.1mm

（it is convenient to use a HK$2 coin as a substitution）

・Round bar: approx. diameter 10mm, length ７0mm

・Flat plate

<Procedures>

1. Detach the mold （or let it be held on the fixed side to release the movable side）.

2. Loosen the U-nut and the power lock.

3. Turn the GC pulley to move the GC face to the position where the interval is 2mm from the

movable die plate.

Place the plate (thickness 2mm) to the GC head and ensure to align both faces of GC and the

movable die plate.

4. Push the EJ shaft to ensure to align both GC and EJ faces with hands.

Using the round bar, with placing it on the GC faces, push the EJ shaft to align GC and EJ.

5. Push the guide plate.

Ensure that there is no gap between the guide plate and EJ shaft.

Keep the bar placed as mentioned in the step-4 to prevent the EJ shaft from moving when the

guide plate is pushed.

（ＯＫ : Gap closed） （ＮＧ : Gap open）

6. Keeping this state, tighten the power lock and U-nut.

Ensure to keep the bar placed as mentioned in the step-4 to prevent displacement

during tightening.

7. Makeauto forced zero adjustment.

（Refer to the another manual “How To Make Forced Zero Adjustment”）

8. Set the position of GC and EJ to be retracted respectively to 1.0mm.

9. Advance the GC in the <PREPARATION> mode and then retract it.

10. Make sure that it is aligned with the movable die plate surface when the actual measurement

is 1.00mm.

GC protrudes from the movable die plate face GC intrudes from the movable die plate face

Increase the GC setting shown in the ADJUST field in the [CHECK］ screen. / Decrease the GC setting shown in the ADJUST field in the [CHECK] screen.

11. Advance and retract the GC again to ensure that the GC positions properly.

Repeat this step until it aligns with the movable die plate surface.

12. In the same manner, advance and retract the EJ.

13. Make sure that EJ is aligned with the movable die plate surface when the actual measurement

is 1.00mm.

EJ protrudes from the movable die plate face EJ intrudes from the movable die plate face

Decrease the EJECT setting shown in the ADJUST field in the [CHECK] screen. / Increase the EJECT setting shown in the ADJUST field in the [CHECK] screen.

14. Advance and retract the EJ again to ensure that the EJ positions properly.

Repeat this step until it aligns with the movable die plate surface.

<Note>

If the mechanical zero point is adjustedproperly, the EJECT can position in the range

between 4.40 and 5.00mm and the GATE CUT can position in the range between 2.90 and

3.50mm. If they position out of this range, the zero position is not adjusted properly.

Please repeat these procedures to adjust them properly.