Donati DRH 1 Series, Инструкция по эксплуатации

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MAN16MG05
instructions for use series drh
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drt 100
1. Acting on down push button -1- , take the hook block in down position -2- and keep out the load (fig. 145).
2. Keep out tension at the hoist pushing circuit brake switch
-3-
; switch in “O” or “OFF” position, reach the work
area, keep on the pendant push button to avoid any other ground activation (fig. 146).
3. Remove motor cover -4- screwing out the four screws -5- (fig. 147a).
4. Remove the fun -6- screwing out the screws -7- (fig. 148a).
6.4.2 Lifting brake adjustment (cylindrical motor DRH4 24kW)
To adjust hoist motor brake go in this way:
• Hoist motor is cylindrical type with electro-magnetic brake with spring in DC current.
• Braking is mechanical due to sprigs that pull the keeper against the disk, so braking motor shaft.
• Brake gaskets ,asbestos free, can wear less or more according with service intensity.
• Brake gasket wearing increases the clearance between keeper and gasket. This causes a progressive
lost of braking torque ,having so longer braking space. For this reason could be necessary the brake
magnetic gap adjustment.
• When brake magnetic gap reaches 0.9 mm go to adjustment.
fig. 145 fig. 146
1
2
3
fig. 147a fig. 148a
5
4
6
7
101 instructions for use series drh
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MAN16MG05
fig. 149 fig. 150
fig. 151 fig. 152
• Check the total thickness value of brake disk (friction ma metallic disk).
When the thickness reaches a value of 8.1 mm go to disk replacement, using SOLELY original
spare parts.
• For brake disk replacing operations see point 6.6.3
5. Loosen register screws -8- using an hexagonal wrench (fig. 149a).
6. Dowel 3 blades thickness
-9-
of 0.8 mm near fixing screws positioned at 120°, between the magnet and the
keeper, leaving them inserted during all adjustment.
7. Adjust magnetic gap thickness screwing the fixing screws TCEI -10- using a setscrew wrench with a crossed
sequence, until to reach a light strength on the thickness blades (fig. 150a).
8. Tighten register screws -8- , with an hexagonal wrench, against the motor shield.
9. Loosen fixing screws TCEI -10- about 1 turn , extract the thicknesses and tighten the screws -10- with a dyna-
mometric wrench adjusted at 46 Nm with a crossed sequence (fig. 151a).
10. Check with a thickness gauge -11- that magnetic gap value is 0.5 ± 0.05 mm (fig. 152a).
11. When magnetic gap value is NOT in tolerances stated at point 6 , go to a new adjustment.
KMAN16MG05