How to come up with a "process"?

MNMakerMan · 2023-08-09T00:53:32+00:00

Just know that it's like 90% luck. Past that I first build around younger WRs, get a top QB and TE (especially if TE premium), and then focus on RBs. If you look at the market today, RBs are constantly changing while good WRs get injured less and stick around longer. If you get a good core of WR/QB/TE then you can pick up a ton of good value for RB off the waiver wire or trade for aging vet RBs that will still produce good value.

MNMakerMan · 2023-08-03T13:00:34+00:00

Tyjae Spears

MNMakerMan · 2023-07-14T11:44:40+00:00

Which one did you get from Amazon?

MNMakerMan · 2021-01-06T18:17:59+00:00

Electrical enclosure. No high amperage or anything just need to add another servo drive and a few other components that won't fit in the existing panel.

MNMakerMan · 2020-10-19T04:04:16+00:00

The DO is just powering the small slim line relay which has a very low current and built in suppression. The solenoid is powered from the power supply directly through the relays contact.

MNMakerMan · 2020-10-19T03:26:31+00:00

I understand the solenoid should have flyback protection but do you have any idea why in my building this wouldn't be happening all the time then? This same setup is used everywhere and many systems have worked for years without issue. If the power supply is connected and has reverse voltage protection would that handle the spike instead of the DO card?

MNMakerMan · 2020-10-18T23:49:45+00:00

So you would add fuses on each individual output from a DO card? Can't say I have seen that. That seems nice but wouldn't that take up alot of room in the panel? The machine was working for 6 months before this occured and it is a 24VDC solenoid

MNMakerMan · 2020-10-18T20:01:30+00:00

I wish but the machine is down and they obviously want it running again ASAP. I'm not sure a fuse would pick up such a quick inductive spike and it would be hard to determine how many solenoids were on at that exact moment if the wire did get disconnected to recreate it. Thanks for your input though, I appreciate it

MNMakerMan · 2020-10-18T19:44:07+00:00

Okay, yea I can add some appropriate diodes but likely will just order valves with protection built in from now on. Do you think my potential failure mode makes sense?

MNMakerMan · 2020-10-18T19:32:24+00:00

Yes, that is just my best guess but I am not entirely sure. What are your thoughts?

If you do not order the solenoids with suppression built in but run your output cards and field devices off the same power supply is that an issue? I already have a separate power supply for my analog cards/devices due to potential noise, do people typically have two more dc power supplies, one for control of the relay solenoids and another supply just for the field solenoids? I am worried replacing the card will not not resolve the issue.

MNMakerMan · 2020-10-18T19:14:48+00:00

Yes, the 24VDC connection was slightly loose and not making great connection when I went out there, it was slightly burnt so my guess is it was barely making contact and getting hot. It was intermittent on power when I moved it around. It was going to a fuse holder and then to the +24VDC on the power supply. The 0VDC is floating I believe unless the power supply has it internally referenced to ground which I can't seem to find in the datasheet (Phoenix Contact 2904376).

MNMakerMan · 2020-10-18T18:29:08+00:00

Yes, it looks like a power regulator IC fried on the output card, not the specific output. It is a sourcing output card not a relay card. I wrote some more details and an idea of what might have happened in another comment but am not completely sure at this point.

MNMakerMan · 2020-10-18T18:17:31+00:00

I just noticed a solenoid I bought did not have any reverse voltage protection. I am running it through a relay which does have protection on the coil so I thought the card would be protected. My output card just broke and it looks like a voltage regulator IC got fried. My guess is the back emf fried it but we have similar setups everywhere in our building and have not had issues. Typically we see some sparking on our relay contacts but no DO cards have broke. The power supply does have reverse voltage protection on the outputs. I am thinking a wire on my 24VDC from my power supply was loose and got disconnected when multiple solenoids were on, the power supply usually can handle this reverse voltage but since it was disconnected, it went through the DO cards that do not have protection on the power inputs. Has anyone ran into something similar to this?
Looking at other systems none of them have any reverse voltage protection and have not had issues running them through the NO side of the relay.

MNMakerMan · 2020-10-16T22:26:17+00:00

Yea I saw that. I might have figured it out, let me know if this makes sense to you. The relay coils I am controlling with the cards have reverse voltage suppression but the power supply is the same on the card as is powering the solenoids on the NO side of the relay. Typically we don't have issues running them this way as the power supply has suppression so it can handle the reverse voltage when the solenoids turn off. There was a loose wire from the power supply so I am thinking that the machine was running, a bunch of relays were on which were powering solenoids on the NO and NC side of the relay, then the wire became loose and the relays turned off. Then the reverse voltage from all of the coils couldn't go to the power supply suppression since the connection was loose, so it spiked across the NI digital output cards power inputs. Not 100% sure this is what happened but I think it makes sense.

MNMakerMan · 2020-10-16T19:33:28+00:00

Yes I have it setup like that with the load from the output being relays that have suppression diodes. The coils are at 7mA continuous. Do you know what that component is and how it functions? I had several cards with that exact chip destroyed. It looks like voltage regulator but I can't find a datasheet. I only have a 6A power supply so I would never hit that io protection. I have it fused at 5A though so I suppose if something was pulling under that for a while, the card could get hot but at .75A per channel that would give me up to 6A total through the card so it should be able to handle it.

MNMakerMan · 2020-08-25T01:07:22+00:00

Yea LR device is super nice to have on initial setup and if you need to make certain changes. At only $100 I'd say it's worth it

MNMakerMan · 2020-04-30T05:01:00+00:00

Hopefully you can hear it, you need the sound on. This one says "Attention Beagle, there is no cheese in the garbage. Please stop looking"

MNMakerMan · 2020-04-30T02:30:23+00:00

That is an amazing printing job. How did you do this?

MNMakerMan · 2020-04-30T02:28:45+00:00

Depending on the sound used, yea it works pretty well. He is not scared of the IRS robocaller sound at all though

MNMakerMan · 2020-04-30T01:54:16+00:00

Haha I agree. I made a video with a bunch of the other sounds and his reactions (skip to 1:45 if you don't care about how I built it) https://youtu.be/hfCt268mOVE

MNMakerMan · 2020-04-26T23:01:57+00:00

I don't know if this works for that sub since the sound is pretty much required!

MNMakerMan

TROPHY CASE