HI. I have an RDC644XG controller in the laser cutter I'm building. I also have a water flow detection device which has a simple switch inside. Connection made when water is flowing.
I'd assumed I could just connect to the controller but having looked at the manual but now not so sure it's that simple. The diagram shows a water chiller with a 'water protect switch' two wire connection to the controller. The manual goes on to describe the connection thus:
"The input port of water protector for the first laser power source.
When the water protector 1 is enabled, the controller will detect
the input port of water protector 1. If this port is of low level, it
will be deemed normal; if this port is of high level, the controller
will forcibly close the laser to suspend the work in progress and
the system will warn. If the water protector 1 is not enabled, the
controller will not detect the input port of water protector 1 and so
the water protector 1 can be unconnected.
Water protection input must be 24V logic level."
So, can anyone confirm that I can't simply connect the switch across the terminals. What do I have to do - provide a switched 24v input when the water switch is closed??
Connections for a water flow switch?
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Jeffrey Aley
- Posts: 388
- Joined: Fri Aug 11, 2017
- Location: Folsom, California
- Country: United States
- Laser Machine Make or Type: Kehui
- Laser Power: 50W
- Laser Bed Size: 500mmx300mm
- Home Position: TL
- RDWorks Version: 8.01.24
- Ruida Controller: RDC6442
- Windows Version: Win10 Enterprise
- Accessories: Spray bottle with water (for small fires)
Fire extinguisher (for big fires)
As you know from the diagram, the switch goes between WP1 and GND [Earth].
If the switch is closed (WP1 = 0 [GND]), then the laser will work.
If the switch is open (WP1 = Z), then I assume an internal pull-up will cause the input to be '1 and the laser will not fire.
If the switch is closed (WP1 = 0 [GND]), then the laser will work.
If the switch is open (WP1 = Z), then I assume an internal pull-up will cause the input to be '1 and the laser will not fire.
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Bryan Boyd
- Posts: 12
- Joined: Tue Aug 06, 2019
- Location: Austin, tx
- Country: United States
- Laser Machine Make or Type: Shenhui SH-350D
- Laser Power: 50W
- Laser Bed Size: 12x20
- Home Position: TR
- RDWorks Version: Na
- Windows Version: 8
I don't think you can just connect the wires across the existing terminals. I just went through this when I wired in my CW-3000 to my circuit. There may be a better way to do it, but I ended up using a relay board and the existing cabling to add the water protection. It was a pretty straightforward install.
https://www.amazon.com/gp/product/B00LW ... UTF8&psc=1
https://www.amazon.com/gp/product/B00LW ... UTF8&psc=1
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Dave Vigness
- Posts: 526
- Joined: Sun Dec 15, 2019
- Location: Kansas City - Rural
- Country: USA
- Nickname: Dave
- Laser Machine Make or Type: Chine Red and Black
- Laser Power: EF RF2 80W
- Laser Bed Size: 20 x 26
- Home Position: TR
- Control Software: RDWORKS
- RDWorks Version: 8.01.54
- Ruida Controller: RDC6445
- Windows Version: 7
- Accessories: Power Switch for air assist / exhaust blower, Ma meter with switch for external digital, dual digital temp gauge, LED lights under gantry and and and.
Pics and a list here. https://drive.google.com/drive/folders/ ... sp=sharing
RuiDa controllers control the ground, not the positive. Your connection would be between the 5V and the WP, not between the WP and the ground.