System Connection; Readhead Only (No Interface) - Renishaw ATOM Installation Manual

System connection:

Readhead only (no interface)

The ATOM readhead is available in several variants:
Cable variant with a 15 way D-type connector
u
Cable variant with interboard connector
u
FPC variant
u
None of these readhead variants has an integral calibration (CAL) button. Provision should be made
in the customers' electronics for momentarily connecting the CAL line to 0 V to initiate the calibration
routine, switch AGC on/off or restore factory defaults. See page 28 for pin-out information.
Calibration is an essential part of system set-up that optimises the incremental signals and
phases the reference mark. See page 22 for information on the calibration routine.
For cable variant with interboard connector
Ensure that the interboard connector is inserted into the connector on the customers' electronics
u
NOTE: Care should be taken to ensure correct orientation
Use a metal clamp around the cable ferrule to ground the readhead cable and ensure continuity
u
of the shields
Provide appropriate strain relief
u
u Ensure suitable clamping to retain interboard connector to the mating connector
JST 12 way,
single row
12SUR-32S
ATOM
linear installation guide
1 13
2 14
Interboard connector
14 way, dual row
DF23C -14DS- 0.5 V
For FPC variants
Ensure that the FPC cable being used has the following specifications:
16 core
u
Conductor pitch 0.5 mm
u
Minimum exposed conductor strip length 1.5 mm
u
u Maximum exposed conductor strip length 2.5 mm (to ensure isolation from the body)
Contact your local Renishaw representative for more information of the FPC design requirements.
Shielding
For optimum performance:
u Ensure 100% shielding
Ground the mounting brackets
u
Ensure continuity of all shields
u
Maximise the distance between the encoder and motor cables
u
Provide appropriate strain relief at the readhead
u
Shield
connect pad
Example of strain relief:
Interboard
connector
4 mm
PCB FPC
connector
FPC
cable
Readhead LED
0-0.5 mm
3.25 mm
11