I am looking for some direction....
I have built cnc, lasers, and plasma cutters with arduino.
I am in the process of building another machine.
The customer is wanting to have visual access to the following displayed on the control box that will be hangning on the wall next to the machine.
4 power supply voltages and amps
4 stepper driver voltages and amps
Internal tempratue of the controller box.
I have read and read and it seems easy enough to do a voltmeter and a ammeter on a single unit but I am needing 9 different screens with the above info or 1 large screen.
So needing a little direction if possible.
Thanks in advance.
They want visual displays at the devices? Or remote displays so they can monitor from office/ Home? Huge difference. Be clear what it is that is required.
They are wanting displayed on the CNC controller box
Something like the picture but just the information i mentioned.
How will the volts and amps at the power supplies be different than what is at the drivers?
That is my question to them. But customers are always right for the most part. Attached os image of the intial wiring not sure if both diodes are needing on the + lines. Had to make correction first set of diodes.
Is your question about how to measure, or how to display?
The wiring I am good on.
I am not sure as Displays. LCD, Oled, I2C, SPI ETC
I have been reading alot on the subject and I think I am more confused than I was before I started.
I want to show on 3 displays LCD 12864-06D 6 lines x 20 characters
I have several Unos but not sure if one is enough or how many displays i can connect on one uno
Or which is the better route to go or if there is a bigger screen.
Are the diodes supposed to act as fuses? Are you running AC and trying to convert it to DC with those diodes?
The diodes are to restrict the back flow so only the volt/amp is valid for that area.
So one sensor between the first diode and PWS and another sensor after the second diode between it and driver.
So your ARE running AC! Do you remember the electrical law that ALL current in a circuit is the same value in all parts of the circuit? I forget his name!
The voltage being read is DC voltage not AC.
So this is what I am thinking.
PWS to diode first sensor reads only that section. Gives overall reading of both drivers.
The sensor between the other diodes reads only what that one driver is pulling not both.
What is the problem you want to solve?
If the drivers are pushing back current (from inductive loads), and you add a diode, where will the current go? How high will the voltage go if the current cannot flow?
I am looking for the best way to do 3 or 4 screens using spi interface. IF that is the best way.
Using either the nano, uno, etc. I have 3 or 4 Unos on hand.
Only items on screen is going to be text.
Then there is the subject of which screens,
3 or 4 128x64 6 line 20 characters or 1 big screen like a 7" tft RA8875
Wiring setup would be the following and sensors between diodes and PWS and between diodes and Driver.
I have knowledge of Grbl and Grbl Hal
Any feedback would be helpful.
Please tell us how long the different current and voltage difference will last. Can your sensors and code react and display the values in that time?
Basically it will be realtime as it is monitoring stepper drivers and voltages along with a temp of the case.
What are ALL the voltage and amperage ranges?
Regardless, this is not a simple project.
Voltages will range from 0 - 51 volts.
Amperage will range from 0 - 10 amps
All DC Voltages
Which voltage and amperage sensors have you chosen?
Are they required to meet industrial isolation standards?
VA sensors I was looking at are the ACS712
and Temp sensor is DS18B20
No industrial setting.
Private use. Customer is just wanting to be able to watch voltages and amps to keep eye on any issues that may arise on that side.
That is a reasonable starting point. Naturally, you will also need voltage sensors.
