John,
So if I understand you correctly, you are suggesting using
LinuxCNC computer to communicate via CANBUS or MODBUS
long distance remotely with the dust collectors?
The way I have it set up is: The dust collectors are suspended from the
ceiling,
but I have all the solenoid wires coming to a central location
electrical panel
that also holds the VFD's for starting and stopping the motors.
I run the VFD's at half speed while doing the reverse pulse.
So all the pulse control can be at the central electrical panel.
-Earl
On 8/22/2023 11:59 AM, John Dammeyer wrote:
Earl,
I tried to send this to the list but both the xml and zip files resulted in
black listed attachment messages.
John.
Although I haven't touched this for almost 2 years and only tested on Pi4
LinuxCNC on the benchtop one approach to dealing with external hardware is
CAN bus using the CANopen protocol. Attached is my source code for that.
Eventually I will do a far more extensive write-up on how to interface to
CAN bus and LinuxCNC. Especially using a Pi with a CAN Hat instead of the
serial port and the LAWICEL CANUSB dongle.
Alternatively there are examples out there for MODBUS and I'm sure you can
find Arduino code that makes an Arduino a MODBUS module.
John Dammeyer
-----Original Message-----
From: Earl Weaver [mailto:weaverst...@frontier.com]
Sent: August 22, 2023 8:41 AM
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Reverse Pulse Control on Dust Collectors
Hi everyone,
Does anyone have suggestions what would be a good option
for reverse pulse control on my dust collectors?
I have 3 separate dust collectors that use (two each) air solenoid valves
to give the filters an alternating 100 millisecond (1/10 second) pulse
to remove the dust from the filters.
I have solid state switch relays (triac) to pulse the 120 volt AC
solenoid valves.
I already have this setup on my LinuxCNC Plasma cutter and have it
working with ClassicLadder in LinuxCNC.
It seems somewhat overkill to use a full LinuxCNC setup to control these
other three dust collectors.
Would a micro-controller like Arduino be a better solution?
I have no experience with Arduino.
What about a PLC?
Any input, or suggestions?
Thanks,
Earl
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