Coil Size; Curved Track Specification; Lms Component Selection; Coils - Bosch Rexroth NYCe 4000 Design Manual

26/47
Hardware components selection
4.5.3

Coil size

4.5.4

Curved track specification

4.6

LMS component selection

4.6.1

Coils

Bosch Rexroth AG R911386072_Edition 07
every time the carrier moves through the curve at the moment the sensor is
no longer detected. For that reason the second restriction applies for carriers
with large magnet plates. The second restriction applies for the following
magnet plates of the following length.
● TM series: L > 192 mm
m
● TL series: L > 384 mm
m
● TB series: L > 864 mm
m
The maximum coil length that can be used in a curve is limited by the radius
of the curve. A smaller radius results in a smaller coil length. The coil type for
the curve can be selected from the following table.
Curve radius TM3 series coil
r < 400 mm ✓
r < 800 mm ✓
r > 800 mm ✓
Tab. 4-1: Coil types for a curve
The force reduction in a curve depends on the radius of the curve. When the
carrier is in between two coils the force reduction is the largest. For example,
on a curved track with a carrier of 192 mm, a radius of 400 mm and TL6
series coils, a force reduction of 25% is measured in between the coils.
The system designer must always be aware that the available
force is reduced by 25% when using a curved track.
The position accuracy of a carrier in a curve is undefined.
The coils that are needed for the application is a result of the drive sizing
calculations, see chapter 4.4 "Drive size calculations" on page
Remarks
● If the application uses a straight track geometry, the minimum required
margins are 10%.
● If the application uses a curved track geometry, the minimum required
margins are 35%.
● As mentioned in the
paragraph "Carriers", 3 types of magnet material is available. If SmCo
vacuum magnets are used, an additional 10% margin for drive currents
and magnet forces is required.
NYCe 4000 Linear motion system LMS Design Guide
TM6 or TL6 series coil
✓
✓
chapter 4.1 "Introduction" on page
TL9 series coil
✓
24.
21, in the