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M-238 High-Load Linear Actuator

Dynamic, High-Resolution Precision Drive with DC Motor and Direct Position Measuring

Optional: linear encoder for direct position measuring
High load capacity up to 400 N
Travel range 50 mm
Resolution to 0.1 µm
Velocity to 30 mm/s

The velocity constancy of an M-238.5PL at 30mm/s.

The repeatability of the M-238.5PL with linear encoder is less than 0.3µm.

The M-238 requires less than 1.5 seconds for a 30-mm step.

M-238, dimensions in mm. Note that a comma is used in the drawings instead of a decimal point.

Product Description Description Specifications Downloads Quote/Order

Reference-class linear drive

High-resolution, high-load linear actuator. Highly dynamic, closed-loop DC motors for high velocities.

High-quality components

Ball screw for high velocities and a high number of cycles. Stable bearing at shaft output reduces lateral forces on the pusher. Nonrotating tip for uniform motion prevents wobble, torque, and wear at the point of contact. Incl. flat and spherical tip for decoupling forces. Noncontact limit switches protect the mechanics. A direction-sensing reference switch supports automation applications

Highly-accurate position measuring with incremental linear encoder

Noncontact optical linear encoders measure the position with highest accuracy directly on the platform Nonlinearity, mechanical play or elastic deformation have no influence on the measurement.

Application fields

Precision alignment, external drive element for guided systems.

Motion	M-238.5PG	M-238.5PL	Tolerance
Active axes	X	X
Travel range in X	50 mm	50 mm
Maximum velocity in X, unloaded	30 mm/s	30 mm/s
Positioning	M-238.5PG	M-238.5PL	Tolerance
Minimum incremental motion in X	0.5 µm	0.3 µm	typ.
Unidirectional repeatability in X	± 1 µm	± 0.3 µm	typ.
Backlash in X	3 µm	1 µm	typ.
Reference switch	Hall effect	Hall effect
Reference switch repeatability	1 µm	1 µm
Limit switches	Hall effect	Hall effect
Integrated sensor	Incremental rotary encoder	Incremental linear encoder
Sensor resolution	4000 Cts./rev.
Sensor resolution		100 nm
Drive Properties	M-238.5PG	M-238.5PL	Tolerance
Drive type	DC gear motor with ActiveDrive	DC gear motor with ActiveDrive
Nominal voltage	24 V	24 V
Drive force in X	400 N	400 N	typ.
Mechanical Properties	M-238.5PG	M-238.5PL	Tolerance
Permissible push force in Y	100 N	100 N	max.
Drive screw type	Ball screw	Ball screw
Drive screw pitch	2 mm	2 mm
Gear ratio i	3,71 : 1	3,71 : 1
Overall mass	2400 g	2400 g
Material	Aluminum anodized, chrome steel	Aluminum anodized, chrome steel
Miscellaneous	M-238.5PG	M-238.5PL	Tolerance
Operating temperature range	-10 to 50 °C	-10 to 50 °C
Connector	D-sub 15-pin (m)	D-sub 15-pin (m)
Recommended controllers / drivers	C-863.12 C-885 with C-863.20C885 C-884	C-863.12 C-885 with C-863.20C885 C-884

3D Models

M-238 3-D model

Version / Date

zip - 648 KB

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Datasheet

Datasheet M-238

Version / Date

2023-07-12
pdf - 736 KB

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Documentation

Short Instructions MP122EK

Linear Actuators: M-168 / M-22x / M-23x

Version / Date

6.0.0 2023-10-10
pdf - 372 KB

Download

Documentation

User Manual MP77

M-238 High-Load Linear Actuator

Version / Date

1.1.0 2020-11-04
pdf - 2 MB

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M-238.5PG

High-load linear actuator; DC gear motor with ActiveDrive; 50 mm travel range; 400 N feed force; 30 mm/s maximum velocity; ball screw; incremental rotary encoder, 4000 counts/rev. sensor resolution; limit switches: Hall effect

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M-238.5PL

High-load linear actuator; DC gear motor with ActiveDrive; 50 mm travel range; 400 N feed force; 30 mm/s maximum velocity; ball screw; incremental linear encoder, 100 nm sensor resolution; limit switches: Hall effect

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