CP43维护手册.pdf.pdf - 第65页
5 – 23 V ersion 6.0 Chapter 5 The T welve Stations The rotational angle of the clutch is determined by the curve of the cam; thus, it need not be adjusted. However , the vertical setting of the clutch and the backlash of…
Chapter 5 The Twelve Stations
5.3 Station 3
At station 3, the part is rotated to the initial theta axis position. This
function is termed “pre-rotation” and abbreviated to Pθ. The pre-rotation
function rotates the part picked up at station 1 to approximately the angle
specified in the program. Pre-rotation reduces the cycle time by reducing
the time spent to perform fine rotational adjustment (Fθ) at station 6 after
vision processing has been performed at station 4.
However, pre-rotation can only be carried out in units of 90°; parts are
rotated +90°, 0°, or –90°. If a program calls for a part to be rotated 180°,
the part is first rotated either +90° or –90° at station 3. Then at station 6,
the part is rotated the remaining 90° plus the number of degrees necessary
for fine rotational adjustment. Thus parts that require 180° rotation
slightly lengthen cycle time.
Pre-rotation involves vertical movement as well as rotation in the θ
direction.
Pre-rotation is driven by cam and cylinder mechanisms. The cam drives a
lever, which drives a rod, which drives a lever, which drives the clutch,
which rotates the cylinder +90° or –90°.
Fig. 5-23 Pre-rotation (P
θ
) Mechanism at Station 3
5 – 22
Version 6.0
CP IV-3 Maintenance
5 – 23
Version 6.0
Chapter 5 The Twelve Stations
The rotational angle of the clutch is determined by the curve of the cam;
thus, it need not be adjusted. However, the vertical setting of the clutch
and the backlash of the gear must be adjusted. These adjustments should
be performed with the power off.
Clutch Vertical Adjustment
(1) Press [SET], [MANUAL], [I/O] and [OUT] to access the IO map. Turn
"YO22 PQ ROT SOL ON" to ON and "YO23 PQ ROT SOL OFF" to OFF
and remove the stopper so the lever can move freely.
(2) With the cam at 0° touch the dial gauge to the fluorescent disk and set
the gauge to zero.
(3) Using the cam handle, turn the cam handle backwards to 260°.
(4) With the cam angle at 260°, adjust the adjustment rod so the nozzle
pushes the dial gauge down to 0.25 to 0.35 mm.
Fig. 5-24 Pre-theta (Station 3) with Cam at 260°
CP IV-3 Maintenance
Chapter 5 The Twelve Stations
Gear Backlash Adjustment
(1) Set the cam angle to 0°.
(2) Place the dial gauge on the gear teeth as shown below.
(3) Loosen the housing bolt on the machine main body.
(4) Turn the gear shown below by hand. Tap the housing with a rubber
hammer until the amount of gear backlash is 0.1 mm.
Fig. 5-25 P
θ
Gear Backlash Adjustment at Station 3
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Version 6.0
CP IV-3 Maintenance