Bedienungsanleitung Huvema HU 550 VARIO (Seite 18 von 32) (Englisch)

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CHANGES AND TYPING ERRORS RESERVED CHANGES AND TYPING ERRORS RESERVED

7.5. replacinG chanGe wheels

• Disconnect the machine from the power source.

• Loosen the 2 fastening screws and remove the cover.

• Loosen the fastening screw (C, fig 21) on the quadrant.

• Swing the quadrant (D) to the right.

• Loosen the bolt (E) of the lead screw or loosen the bolts of the quadrant to remove the change wheels from the

front.

• Install the change wheels according to the feed and threadcutting table (fig. 22) and mount them on the

quadrant.

• Swing the quadrant to the left until the gear wheels engage.

• Adjust the backlash by inserting a normal sheet of paper between the change wheels.

• Tighten the fastening screw on the quadrant.

• Reinstall the cover and tighten the screws. Connect the machine to the power source.

8. UsinG The Machine

8.1. sTraiGhT TUrninG

Figure 23 – Straight turning

With straight turning, the tool feeds parallel to the axis of rotation of the work piece. The feed can be either manual

or turning the hand wheel on the lathe saddle or the sop slide, or by activating the automatic feed. The cross feed for

the depth cut is achieved by using the cross slide.

8.2. facinG and recesses

Figure 24 – Facing and recesses

In the facing operation, the tool feed perpendicular to the axis of rotation of the work piece. The feed is made

manually with the cross slide hand wheel. The cross feed for cut depth is made with the top slide or lathe saddle.

8.3. TUrninG beTween The cenTers

Figure 25 – Turning between the centers

For turning between the centers, it is necessary to remove the jaw chuck. Fit the MT3 center into the spindle nose

and the MT2 center into the tailstock. Mount the work piece fitted with the driver dog between the centers. The

driver is driven by a catch or face plate.

Note!

Always use a small amount of grease on the tailstock center to prevent overheating.

8.4. Taper TUrninG UsinG TailsTock off-seT

Work pieces to a side angle of 5 mm can be turned by off-setting the tailstock. The angle depends on the length of

the work piece.

Proceed as follows to off-set the tailstock:

• Loosen the fastening screw (A, fig. 26).

• Loosen the fastening screw (B).

• Loosen the front set screw (C) a couple of turns and tighten the rear set screw (D) the same amount of turns.

Repeat this until the required angle is reached. The value can be read on the scale.

• Tighten the set screw (B) and the front (C) and rear (D) set screws to secure the tailstock in this position.

• Tighten the set screw (A).

• The work pieces must be held between the centers and drive by a face plate and driver dog.

After taper turning, return the tailstock to its original postion as indicated on the scale (E) of the tailstock.

8.5. Taper TUrninG by seTTinG The Top slide

Figure 27 – Taper turning by setting the top slide

By angling the top slide, tapers may be turned manually with the top slide. Rotate the top slide to the required angle.

A graduated scale permits accurate adjustment of the top slide. The cross feed is performed with the cross slide. This

method can only be used for short tapers.

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