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TECHNICAL REFERENCE APPENDIX M37 POWER SUPPLY ENCLOSURE Chapter Issue 1 June 15 Appendix to Micron Technical Manuals 3.15 PSU Monitor Board The board monitors the voltages at circuit breaker s CB1 - CB31 on the power dis…
TECHNICAL REFERENCE APPENDIX
M37 POWER SUPPLY ENCLOSURE
3.14 Appendix to Micron Technical Manuals Chapter Issue 1 June 15
Printhead Cover
Loop
The printhead cover loop consists of a series circuit connecting the two E Stop
blanking plugs, the front cover interlock and the rear cover interlock. The E Stop
loop supply (software E Stop) from the NextMove interface card passes through
the loop to the solenoid of the E Stop relay. Once energised the E Stop relay
feeds 24V US from PSU 1 to the solenoids of contactors Con1, Con2 and Con3.
Once energised contactor Con1 feeds 24V SW via contactor Con3 to provide
stepper motor drive. Contactor Con2 feeds +42V dc from PSU 2 via contactor
Con3 to provide servo motor power.
If any component in the loop becomes open circuit or if the E Stop loop supply
drops to 0V, the E Stop relay PNOZ X2 de-energises. Contactors Con1, Con2
and Con3 de-energise, this ensures the immediate shut down of all motors.
On opening the printhead cover, the machine monitor displays the ‘Machine
Operation Suspended - Cover Open’ window. The recovery method is to
close the printhead cover and press the System button.
Two-Handed Relay With the front printhead cover open the machine sees this as an error condition
and motor power is not available. The two-handed relay enables functions such
as priming paper and priming solvent to be carried out with the front printhead
cover open. The operator selects the required function on the MMI prior to
opening the front printhead cover. Once selected both jog buttons are used to
perform the task.
Provided the two jog buttons are pressed within 0.5 seconds of each other, the
two-handed safety relay internal control circuit allows the safety relay contacts
to switch. Contactors Con1 and Con3 activate to enable the 24V SW supply. As
contactor Con2 does not become energized, power is not available for servo
motor drive.
The 24V SW power is enabled whilst the jog buttons are held on. The software,
having being notified that a prime paper or prime solvent function has been
selected, provides drive to the relevant circuit.
System Switch Provided the printhead cover loop is intact, the E Stop loop supply is at 24V and
is available at the E Stop relay solenoid. System power is controlled by the
system switch which is connected to the reset terminals of the E Stop relay
control circuit. Internal auxiliary contacts Con1, Con2 and Con3 are wired in
series with the system switches, this allows the E Stop relay to monitor the
contactors to ensure that they have not welded shut.
By pressing and releasing the system switch, the relay control circuit enables
the activation of the 24V switching contacts and power is available to contactors
Con1, Con2 and Con3. Contactor Con2, via contactor Con3, enables system
power to be available and this is signalled to the control enclosure with the
switching on of Q1. With the 24V SW supply now available, the system lamp
comes on and stays on even though the system switch has been released.
Contactor Con2, via contactor Con3, also enables the 42V dc servo motor
supply.
TECHNICAL REFERENCE APPENDIX
M37 POWER SUPPLY ENCLOSURE
Chapter Issue 1 June 15 Appendix to Micron Technical Manuals 3.15
PSU Monitor Board The board monitors the voltages at circuit breakers CB1 - CB31 on the power
distribution PCB and sends a data stream via the USB port M37SK30 to the
machine PC.
The voltages monitored and where used are as follows:
A separate application is used to display the voltage readings on the machine
monitor, to access this window carry out the following:
1. Switch ON and initialise the machine.
2. On the keyboard, press the Windows key to access the taskbar.
PSU MONITOR BOARD
181507 ISSUE
Voltage Where Used
+24V US NextMove Interface, Camera Lighting, Stepper Logic, Machine Fans, I/O Node
Power, Grid-Lok Tooling, Euroflex and Servo Motor Logic.
+24V SW NextMove Interface, Belt Motors, I/O Node Power and Grid-Lok Tooling.
+5.5V NextMove ES, USB Hub.
+12V I/O Node Power and Grid-Lok Tooling.
-12V NextMove ES.
+42V Servo Motor Supply.
TECHNICAL REFERENCE APPENDIX
M37 POWER SUPPLY ENCLOSURE
3.16 Appendix to Micron Technical Manuals Chapter Issue 1 June 15
3. On the taskbar, select Start, Programs, DEK Power Monitor. The follow-
ing window is displayed:
4. Clicking on the channel ID button, ie (CH01) 24V, opens a further informa-
tion window, an example of which is shown below.