SEW-Eurodrive CMP40 User manual

Drive Technology \ Drive Automation \ System Integration \ Services

Revision

Synchronous Servomotors

CMP40 – CMP100

CMPZ71 – CMPZ100

Edition 07/2010 19352816 / EN

2Revision of the Operating Instructions – Synchronous Servomotors CMP40 - 100, CMPZ71 - 100

1Measuring the working air gap of the BY brake

Revision

Synchronous Servomotors CMP40 - 100, CMPZ71 - 100

1 Revision

1.1 Measuring the working air gap of the BY brake

The working air gap can be measured via the stroke of the pressure plate when the

brake is released. The permitted working air gap for brake sizes BY2, BY4 and BY8 is

0.15 – 0.6 mm. If the working air gap exceeds 0.6 mm, the brake will have to be

replaced.

The working air gap cannot be adjusted.

INFORMATION

This revision describes amendments made to the operating instructions "Synchronous

Servomotors CMP40 – 100, CMPZ71 – 100" (part number 16907213/EN, edition

07/2010). The following chapters are amended:

• Chapter 7.2: "Notes on the BY brake", page 67

Please use the data and descriptions made in this chapter. This document does not

replace the above mentioned operating instructions.

INFORMATION

Customers can check the working air gap for inspection purposes.

Revision of the Operating Instructions – Synchronous Servomotors CMP40 - 100, CMPZ71 - 100 3

1

Measuring the working air gap of the BY brake

Revision

1.1.1 Brake with manual brake release

1. Isolate the motor and brake from the power supply and safeguard them against

unintentional power-up.

2. Remove the forced cooling fan, if installed.

3. Connect the brake to the power supply.

4. Release and apply the brake electrically. When doing so, measure the stroke ∆H of

the pressure plate at the studs. This stroke ∆H corresponds to the working air gap.

4386101131

ΔH

4Revision of the Operating Instructions – Synchronous Servomotors CMP40 - 100, CMPZ71 - 100

1Measuring the working air gap of the BY brake

Revision

1.1.2 Brake without manual brake release

1. Isolate the motor and brake from the supply and safeguard them against uninten-

tional power-up.

2. Remove the forced cooling fan, if installed.

3. Remove the closing caps [1] from the two boreholes.

4. Insert one screw each into the boreholes.

SEW-EURODRIVE recommends the following screws:

5. Connect the brake to the power supply.

6. Release and apply the brake electrically. When doing so, measure the stroke ∆H of

the pressure plate at the studs. This stroke ∆H corresponds to the working air gap.

7. Remove the two screws when you have finished measuring the working air gap.

8. Close the two boreholes with new closing caps [1].

The following table shows the part numbers for the replacement closing caps:

Brake sizes Screw size Part number

BY2, BY4 M5x75 1328 145 3

BY8 M6x70 0011 834 6

Brake sizes Part number

BY2, BY4 1328 148 8

BY8 1322 534 0

4386103563

[1]

[1]

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