© 2016 SPI Lasers UK Ltd.
Commercial in Confidence
SM-S00500 Revision A 21 October 2016
redPOWER QUBE Cased Fiber Laser User Manual
7.6.5 PL5 – Machine Interface
The Machine Interface connection is made through PL5 at the rear of the QUBE Fibre Laser,
via a 25 way D-Type Plug (male). It consists of seven inputs and seven outputs. Each
input/output can be software configured to perform a specific function selected from a list of
available functions. The default configuration should be suitable for the majority of
applications, but the configurable flexibility allows Laser Integrators to tailor the interface to
their application if required.
To prevent operational problems caused by ground loops, the Machine Interface I/O hardware
is opto-isolated and requires an external 24V supply, connected as described in section
7.6.5.1, in order for the outputs to function. The configured output functionality is available in
both Local and Remote operating modes, although the Machine Interface must be provided
with 24V to power the opto-isolation.
Some of the functionality for the input/output is multiplexed depending on the processing
mode, for example; the Laser ON / Process Cycle Start changes functionality depending on
whether the QUBE Fiber Laser is processing in parameter sets or process cycle mode.
Please read all of this section before using the Machine Interface to be familiar with all its
operation.
7.6.5.1 Machine Interface Supply
The Machine Interface must be powered by a power supply in range of +15 to +30V (typically
+24V) capable of delivering 200mA. Power is provided by connecting the external supply
between PEXT and GNDEXT on the pin allocations shown in Table 10. Two PEXT and
GNDEXT connections are provided for convenience. Each pair is linked internally, and
normally only one of the pair needs to be connected to the external supply. Nominal load for
each input is 5mA. The maximum current capability of each output is 50mA.
7.6.5.2 Default Configuration
Table 10 below shows the default functions for each pin connection on PL5.
Note: the functionality of IN0 – IN6 and also OUT0 – OUT6 can be re-configured using the
FiberView control software.
The External Trigger Input (IN6 in default setting) can be reprogrammed similarly to the other
Inputs. However, if a Trigger input is required it is recommended to use Pin 16 as the
hardware behind this connection is optimised.
The Machine Interface optimised Trigger (IN6) can operate at up to 50kHz. At the maximum
frequency the control system will accommodate up to a 50% duty cycle comfortably. However,
if one of the other inputs (IN0 – IN5) is used, there will be a maximum operating frequency of
4.7kHz for a 50% duty cycle, beyond which input edges may be missed. This maximum
frequency will increase slightly as the duty cycle is reduced.
Note: Do not assign Laser ON function (ID2, Table 10) to Trigger Input Pin 16 due to the high
speed nature of this input potentially causing internal timing conflicts.
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