00197042-04_SM_X-Serie-S_Customer_EN - 第149页

6 Gantries 6.3 X and Y axis Service Manual SIPLACE X-Serie S 06/2019 149 Overview Fig.184: Overview of incremental encoder 1. Incremental encoder (mounted on the holder) 2. Holder 3. Fastening screws (3x) for holder Fig…

6 Gantries

6.3 X and Y axis

148 Service Manual SIPLACE X-Serie S 06/2019

Fig.183: Casting marks on the incremental encoder

► Align the incremental encoder. Pay at-

tention to the following points:

– Set the exact height of the scale.

– Align the incremental encoder, us-

ing the two casting marks (arrows),

which mark the read area.

– Align the incremental encoder paral-

lel to the scale. The gap at the top

and bottom must be the same size.

► Tighten the fastening screws.

► Reconnect to the electricity supply (connector X14 or X15 on head interface).

CAUTION

Check how the cables are run!

► Make sure that the axes can be moved without damaging the cables.

► Fasten the cables with cable ties.

► Move the gantry into the end stopper and check that the buffer does not come into contact

with the cable.

► Check the track signals with the test device (see 6.3.8 "Track Signals and Zero

Pulse" [}153]).

6.3.2 Replacing the Y axis incremental encoder

Parts, equipment and tools

●

Select the correct incremental encoder:

Machine Incremental encoder (read head)

SIPLACE X4i S, X4 S, X3 S, X2 S MS22/25 Y axis [03094996‑xx] (including plastic

thickness gauge)

SIPLACE X4i S micron, X4 S micron MS30 Y axis [03102065‑xx]

●

If needed, mounting bracket for Y axis sensor [03086842-xx]

●

For MS22/25 incremental encoder: test device PG1-I [03102699‑xx]

●

For MS20/30/35 incremental encoder: test device PG-U [03071361‑xx] from FS02 (see also

technical information "Checking the track signals at the X and Y axes" [DE:TI2019‑02D04]

[EN:TI2019‑02E04])

●

Ethanol

Isopropanol – IPA can be used as an alternative.

6 Gantries

6.3 X and Y axis

Service Manual SIPLACE X-Serie S 06/2019 149

Overview

Fig.184: Overview of incremental encoder

1. Incremental encoder (mounted on the

holder)

2. Holder

3. Fastening screws (3x) for holder

Fig.185: Overview of gantry interface

1. Gantry interface

2. Trailing cable holder on gantry

Removal

► Switch off the machine, disconnect it from the power supply and secure it to prevent

unauthorized reactivation.

1.2 "Preparatory work..." [}16]

► Unplug the incremental encoder cable from the gantry interface. In this case make a note of

the position to make clear assignment easier later on.

► Unthread the connection cable as far as the incremental encoder.

► Remove the three screws fastening the incremental encoder holder and carefully remove this

together with the incremental encoder.

Installation

► Clean the reading surface of the incremental encoder with a cloth and ethanol or with a Q tip.

► Fit the incremental encoder with the three fastening screws. To do this, place the thickness

gauge provided between the incremental encoder and the scale, so that there is a gap. This

gap must either be 0.4mm (golden scale) or 0.75mm (black-white). Use the corresponding

thickness gauge (plastic).

► Reconnect to the electricity supply.

CAUTION

Make sure that the cables do not rub against anything.

Make sure that the axes can be moved without damaging the cables.

► Fasten them with cable ties

► Check the track signals with the test device (see 6.3.8 "Track Signals and Zero

Pulse" [}153]).

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6.3 X and Y axis

150 Service Manual SIPLACE X-Serie S 06/2019

6.3.3 Mechanical adjustment of the incremental encoder

The incremental encoders (read units) on the X and Y axis are adjusted exactly to the position of

the incremental scale. The two limit marks on the incremental encoder show where the top/bottom

positions of the scale should be.

Set the incremental encoder mechanically to a distance of 0.75 mm to the incremental encoder.

NOTICE

Plastic disks

To set this distance, use one or more small plastic disks with a total thickness of 0.75mm.

► Feeler gauge 0.75mm plastic [03090774-xx]

After this adjustment of the incremental encoder you have to check the zero pulse and track sig-

nals.

Correct installation should ensure correct count and zero pulse signals. For troubleshooting pur-

poses (error analysis and fixing), you will need to measures these signals.

Please also observe section 6.3.8 "Track Signals and Zero Pulse" [}153].

6.3.4 Travel Ranges and Speed Monitoring

The travel range of the X and Y axes will be determined during machine calibration.

Fig.186: Travel range for X and Y axes (X series shown as

example)

1) to 4) = gantry 1 to 4

The end of the X axis travel range is + or -

0.5 mm before the software limit switch,

which is 1.5 mm before the buffer. A safety

distance of 2.0 mm to the buffer is adequate

if the X axis moves into this area with ex-

cessive speed.

The end of the Y axis travel range is + or -

2.0 mm before the software limit switch. The

Y axis travel range for a particular place-

ment area is monitored in one direction by

the software limit switch and a buffer. In the

other direction, there is a permanent ex-

change of communication between the axes

and their positions, via the SPI bus. (see

also 6.3.7 "Anticrash Function" [}152]).