Yaskawa SGDH Linear Sigma Series - Manual (Page 175)

7.1 Linear Servomotor Installation
7-11
7
(3) Magnetic Attraction
The linear servomotor is constructed of an opposing coil assembly and magnetic way. Therefore, the coil assem-
bly is subject to magnetic attraction as shown in the following table (calculated values). Consider the magnetic
attraction when designing the device.
* 1. Indicates an air gap value of -0.3 mm (-0.012 in) relative to the design value.
* 2. Indicates the magnetic attraction for the maximum force.
7.1.4 SGLTW and SGLTM Linear Servomotor (T Type with Iron Core)
(1) Magnetic Way Installation
The SGLTM magnetic way is packaged with two magnetic way yokes secured with aluminum mounting spacers.
Do not remove the installation spacers until the magnetic way is temporarily fixed to the device.
Use the following procedure to install the SGLTM magnetic way.
1. With the mounting spacers attached, place the magnetic way on both positioning steps. Make sure that the
machine and magnetic way are not scratched or dented when positioning the magnetic way. Set the
dimensions of these positioning steps to match the W2 dimensions in the following table.
Coil Assembly
Model
SGLFW-
Air gap G
∗1
is mm (in)
Magnetic attraction F
∗2
(N)
20A090A†
0.7 (0.03)
410
20A120A† 600
35†120A† 1100
35†230A† 2100
50†200B† 2700
50†380B† 5200
1Z†200B† 5300
1Z†380B† 10400
Air gap G
Magnetic
attraction
F
IMPORTANT
Mounting spacer
Caution! Magnetic force!