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Messages - MN300

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211
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 16, 2019, 02:26:46 PM »
Do you keep a fire extinguisher close by?

The current rating is a marginal and if you ever fire both sets of relays at the same time lots of smoke will be let out.

Commercial solid state devices to do the job this way are uncommon and expensive. It's far safer to use a mechanical relay.

As I said before, not knowing how much DC power you have to spare, use a relay to switch AC power to the coil of a DPDT relay.

212
General Mach Discussion / Re: Mach3/MX4660 Zero-Plate Issues
« on: June 15, 2019, 10:47:07 AM »
The title of the diagram showing the switches is "Home / limit switch connections to Input1-4 of the MX4660".
You wouldn't be able to home if the Estop was activated by those switches.

213
General Mach Discussion / Re: Mach3/MX4660 Zero-Plate Issues
« on: June 15, 2019, 10:35:01 AM »
The highlighted signals in the previous post are stepper drive module faults, not limit switches.

The IO table says the Estop and stepper drive module fault signals are combined to become the fault signal.



214
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 14, 2019, 11:04:37 PM »
The opto-isolated OC outputs do not supply voltage. Much like a relay contact, their two pins are together when switched on. Wiring them as shown in the diagram will connect the input of the relay board  to ground, changing it from 5V to 0V.
The OC outputs are for motor controllers that have inputs for direction and enable etc. Your basic controller doesn't have them.

DC Current through a relay contact is harder to interrupt than AC current, hence the lower voltage rating.

215
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 14, 2019, 09:49:15 PM »
I don't know why the LCD output doesn't work for you, it should.

Your success with operating the relay board from the SSRs and the PoKeys relays tell me the 4 OCx outputs could be used with the relay board. I have attached a wiring diagram.

Quote
one thing I was doing is using a relay to turn on the 120v to the kb controller with m3
You shouldn't turn the 120 VAC on and off with M3 and M4. The analog voltage from the PoKeys starts and stops the drive. You do want a manual switch to turn off the drive during tool change. Don't trust the computer with your fingers.

One of the relay board relays or a PoKeys relay can be used to switch the AC to the coil of the high power DPDT motor reversing relay. Unless you have a DC power supply with extra current I would stick with the AC relay for the reversing.

216
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 14, 2019, 06:18:28 PM »
I'll assume yes means the inputs measured 5V.
 
What is rated at 28VDC?

217
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 14, 2019, 04:46:18 PM »
Quote
The Arduino relay's are working correct

By Arduino relays  do you mean the relay board?

Quote
I did get the LCD to change, but the problem was when I connected it to the relay SSR or Arduino it would read unconnected 4v connected 0
almost like it couldn't hold voltage when the relay was connected..

I don't understand what you were connecting to the LDC output. Was either an input on the relay board or the solid state relay module?

If you can make an LCD output switch from 0 to 5V it should be able to drive the relay board input.

If you connect 5V power to the relay board do the inputs measure 5V?

218
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 13, 2019, 05:55:28 PM »
The voltage readings don't make sense. If you used SSR1 or SSR2 the worst you should have had was 0 volts one way and a voltage between 0 and 5V the other way. I suspect something was miswired.

How did you connect the ground of the Pokeys to the relay board, which terminals?
What did you use to supply the 5V power to the relay board?
The relays on that board draw about 80mA each. If you get it working you'll need 8 X 80 = 640mA to run all relays.

I could not find much on your relay board, is it the one pictured in this link?
If so, what are the numbers on the IC near the input terminals?
https://www.ebay.com/itm/273842180913



219
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 12, 2019, 10:01:02 PM »
Exactly which pins had 1.6 V and was anything connected to them when you made that measurement?
Can you supply information about the relay board, model number etc, that could led me to its wiring diagram?

220
Mach4 General Discussion / Re: SSR Relay Forward Reverse Help
« on: June 12, 2019, 06:05:32 PM »
If you need more relays we should do things a bit differently. There are many relay boards advertised as Arduino or Raspberry Pi compatible that will add relays to your setup.  Below is a link to 4 relay board from the same supplier I mentioned before. You can usually get the same or similar products from China via eBay for less money but the delay is much longer.

This board may take more 5 volt power than your system can spare. A separate 5 volts supply would be the safe way to go if you can't verify the current supply can handle the extra load.
A spare 5V USB charger will do as only about 250mA is required. You may have one lying around unused.

Hookup is fairly easy but you would need to be able to use a voltmeter to make sure to get the polarity correct. If you think you have the skill to do this I can make a wiring diagram.
One of the 4 relays could replace the SSR relay for reversing, the others can be used to enable the drive and other things you may think of later.

https://www.mpja.com/Quad-Channel-SPDT-Relay-Board-Isolated-5V/productinfo/35685+MP

https://www.mpja.com/5-Volt-DC-Plug-Power-Supply-4A-Regulated/productinfo/18520+PS/


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