Hi I’ve had my Ultimate Air Assist fitted and working well for a few months. It has just stopped working. I have traced the fault back to Pin 4 - Status on CN1. It is no longer grounding when the job runs. Assuming it is a bad optocoupler and not knowing the spec for a replacement, can anyone conf…

In answer to my own question the answer is yes you can. It’s not an optocoupler but a transistor with a 1P value printed on it. [image] You have to buy them in 50’s or 100’s which I didn’t need and I wanted my laser working now so went ahead with the transplant. It is very fiddly with these tran…

Glad you clarified. I see people blaming opto isolators all the time. It’s clear there’s something in between since it’s current rated to sink 500ma. P1 at Mouser comes back as a P-Chan mosfet, as would be expected :slight_smile: Too bad you didn’t post a photo of the locations of these. Migh…

Hey Jack, I didn’t take a photo of mine but I did find this one and it being discussed on RDWorkslab forum in a thread on the subject that ended with no conclusion. [image] The controller is straight forward to open up. The 4-screws on the back to remove the cover and a further two passing throu…

I saw that also, with the same conclusion. I was hoping for an epiphany from your labors :smiley_cat: Thanks for posting it. I’m sure this is what’s failing, those mosfets. They are the protection for the optical isolators. Although they’ve only been around a couple of decades, I use them a lot…

Hi Jack, Unfortunately no epiphany and disappointed it didn’t turn to gold when I touched it. I ran my Ultimate Air Assist which used ‘status’ as you know, yes, it came with diodes so I used them. I actually put another solenoid in there to open my compressor supply to air assist ( I think you men…

You only need to sense a change of state for the inputs. If you wish to run NO or NC just tell the controller. It would make sense for there to be four of them. X, Y, Z, U… I use status to operate the ventilation and the air pump via a SSR. That gives me low pressure air, the wind sink bypasses…

[image] jkwilborn: . P1 at Mouser comes back as a P-Chan mosfet, as would be expected No. It wouldn’t be expected. To start with, that “P1” is just an in-house identifier and unless you know the manufacturer, an approximate date when it was made, and probably the package style, “P1” on its o…

Yep, excuse my blunder… I have used them since the 80’s… I have also used optical isolators to drive mosfets. The Ruida manuals are not clear on exactly how they use them They do show an optical isolator output From the Ruida manual “All outputs are isolated through the optocoupler, and 500mA c…

[image] jkwilborn: protection diodes I support the use of flyback diodes :slight_smile: [image] Air assist - Delay Relay LightBurn Hardware Compatibility Something I thought about today, you should probably put a flyback / snubber diode on the relay coil (maybe like…

Jeff, I’ve seen that in the manual also… But I’ve spoken to plenty of people that do not use them. Some have advised they are ‘imbeded’ in the solenoid. I don’t buy into that but some have run for years with no problems. It was just a curiosity question. You’re right the diodes are cheap, I migh…

Lost grounding through Status

LightBurn Hardware Compatibility Ruida controllers

Stroonzo (Jeff) August 30, 2021, 9:12pm 10

I support the use of flyback diodes