Node Metal Mitre Saw

PoE node voor the Metal Mitre saw based on a PowerNode White. The QR code points to [this] page.

Use

Swipe your card; this will unlock the 'red' button on the safety contractor to the left. Note that the unit will refuse to power on if the on/off button on the saw is in the unsafe, ON, position.

Once you are done - switch off the saw and then press the green button on the safety contractor to disable it. The unit will lock shortly thereafter.

Trouble shooting

See PowerNode White for details; or use the MENU button to see a QR code with logging.

The log file is available on http://woodlathe.local/ or http://192.168.6.144/. One can also telnet to this address. Logs are also sent to MQTT and to Syslog at the firewall. Or connect a serial cable; but be sure to use a Galvanic USB isolator.

Configuration

The unit contains a AC fed PowerNode White that is on WiFi. This is done by a 5Volt AC/DC convertor on the board (the back thing in the bottom right). It has a single relay that simply turns one of the phases (L) on and off.

One of the 3-phase wires is routed through a current coil (directly; rather than through the connector; as there may be a fair but of current running through it). The opto couplers are wired to the pump and to the safety interlock.

The software can be found in ACNode its examples (in the Arduino IDE) or on GitHub.

details

• Relay dat de interlock onderbreekt
• CurrentCoil om te zien dat de machine aan/uit is.
• Opto voor detectie spanning over safety contactor coil

Board jumpers and settings

Board:

1. Rework 1 - half of OPTO resistors replaced by jumpers; 2x68k left in place
2. Current coil - 6k8 burden
3. Relay 1: Normal 5v Songle relay
4. AC/DC unit soldered in
5. Fuse soldered in (250 mAmp, slow)

Jumpers:

1. VPOE's etc off
2. 5V power via VINT
3. Vpower via VINT
4. N-jumpers for the Optocouples to get the N from the inputs.

Green Connector

PIN	Description	Use
1	CUR2	NC
2	CUR2	NC
3	CUR1	NC - black wire of motor is looped directly
4	CUR1	NC - black wire of motor is looped directly
5	OPTO 2	NC -- N for voltage sense is wired via jumper
6	OPTO 2	Voltage sense across relay (label 'DETECT')
7	OPTO 1	NC -- N for voltage sense is wired via jumper
8	OPTO 1	Pump sense (label 'PUMP')
9	L input	L AC in (brown)
10	N input	N AC in (blue)
11	Relay 1 NO	Interlock (blue)
12	Relay 1 Common	Interlock (blue)
13	Relay 2 NO	NC
14	Relay 2 NC	NC
15	Relay 2 common	NC

As the motor currents are modest; we're using the green connector rather than loop the wire directly through the coil.

Electrics

Basically a SafetyRelay combined with a hand/off/auto setting for the pump. A NodeMitresawMetal is being build (it is a 3-phase/krachtstroom machine) and will be placed in the safety interlock chain that keeps the relay powered.

Log

  Mon  1 Jan 2024 20:21:02 CET	ac/log/metalmitresaw {
 "manual_poweroff": 0,
 "idle_poweroff": 0,
 "errors": 0,
 "ota": true,
 "node": "woodlathe",
 "machine": "woodlathe",
 "maxMqtt": 384,
 "id": "887124a4ae30",
 "ip": "192.168.6.144",
 "net": "UTP",
 "mac": "30:AE:A4:24:71:8B",
 "beat": 1704136278,
 "alive-uptime": 8399,
 "approve": 1,
 "deny": 0,
 "requests": 1,
 "cache_hit": 1,
 "cache_miss": 0,
 "cache_purge": 0,
 "cache_update": 1,
 "mqtt_reconnects": 1,
 "loop_rate": 15.13943768,
 "coreTemp": 53.33333333,
 "heap_free": 168180,
 "rfid_scans": 1,
 "rfid_misses": 131133,
 "rfid": "RFID-MFRC522",
 "state": "Waiting for card, screen dark",
 "seconds_in_state": [
   0,
   3,
   0,
   0,
   0,
   1244,
   0,
   0,
   0,
   7445,
   0,
   2,
   3,
   0
 ],
 "normal_poweroff": 1,
 "fw": "/Users/dirkx/Documents/Arduino/AccesSystem/lib-arduino/ACNode/examples/WoodLatheNode/WoodLatheNode.ino Jan  1 2024 17:45:18"
  }

History

Latest incarnation installed late 2023.