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]