Powermax 45xp lost arc delay (Solved)

More
19 Feb 2021 00:01 #199359 by rodw
Replied by rodw on topic Powermax 45xp lost arc delay

snowgoer540 wrote:

robertspark wrote: you probably want to remove you email from the forum or you'll end up being spammed a load of xxxx


Whoops, good call. Sometimes I’m too trusting I guess. Forget there’s a bunch a party poopers out there.


Too late, I sold it on the dark web... :evil: :evil:

Just joking but the forum is public even if not logged in and there are spiders and bots out there whose whole purpose in life is to harvest emails... Pisses me off as I can't even publish a sales email on my web site!

Please Log in or Create an account to join the conversation.

More
24 Feb 2021 19:15 #200012 by CBEAR
Replied by CBEAR on topic Powermax 45xp lost arc delay
I took your email and signed you up for the church of scientology...so have fun with that one! My consumable life and cut quality has actually been really good since I stopped pulsing the torch in the air to check the arc. I haven't had any complaints since I stopped doing that. I'm still going to switch over to the mechanical relay per hypertherm, and Greg's recommendation, and see what happens.
The following user(s) said Thank You: tommylight

Please Log in or Create an account to join the conversation.

More
24 Feb 2021 21:00 #200025 by snowgoer540

CBEAR wrote: church of scientology


It has science in the name, so I think that means Tom Cruise and I will be hanging out, playing with Plasma cutters?

Actually hanging out with Tom Cruise seems horrible. I think I’ll just go to science church in my garage and play with my plasma cutter instead. :silly:
The following user(s) said Thank You: tommylight

Please Log in or Create an account to join the conversation.

More
24 Feb 2021 21:22 #200032 by tommylight

snowgoer540 wrote: Actually hanging out with Tom Cruise seems horrible.

But he does own a nice bike with a horrible name: Virus!
It is tailor made to fit his miniscule body, or lack thereof ! :)

Please Log in or Create an account to join the conversation.

More
03 Mar 2021 03:29 #200868 by Nick7251
Updated the OP with the Solution in my case. Thanks everyone for their help on this.

Please Log in or Create an account to join the conversation.

More
03 Mar 2021 23:46 #200958 by andypugh

tommylight wrote: But he does own a nice bike with a horrible name: Virus!


You mean Vyrus? I should get one to go alongside my other hub-centred motorcycle.
The following user(s) said Thank You: tommylight, snowgoer540

Please Log in or Create an account to join the conversation.

More
04 Mar 2021 03:12 #200987 by rodw

Nick7251 wrote: Updated the OP with the Solution in my case. Thanks everyone for their help on this.


Thanks for the update. Its interesting that the problem here a few have reported is finally identified and not related to mechanical relays vs SSR's.

So my guess is there is some contact bounce on a slow relay allowed Plasmac to think the signal had dropped out. Perhaps Plasmac should ignore ArcOK dropouts for the first 20-500ms but I guess the debounce is doing that.

Please Log in or Create an account to join the conversation.

More
04 Mar 2021 09:22 #201006 by tommylight
Thanks for the update, read it at the time of posting but was busy to reply.
On a personal note, i need to find a better way to order Mesa stuff, still waiting....

Please Log in or Create an account to join the conversation.

More
22 Apr 2021 21:42 - 22 Apr 2021 21:45 #206834 by beefy
Replied by beefy on topic Powermax 45xp lost arc delay

rodw wrote:

rodw wrote: I decided to try using my Mesa 7i76e spindle relay while we are exploring this thread but I will post on another thread about that as I had some errors...


Actually I resolved my error and its possibly relevant so I will post here.
I changed my torch on relay to be the 7i76e spindle enable relay. Removed the plasma cutter wires from my relay and connected to TB4-5 and tb4-6. Once I powered up the 7i76e, the torch came on unexpectedly so I switched off the plasma cutter. Then started up in a more orderly fashion and got a startup error from the plasma cutter which is described in the manual



Active Low seemed interesting and I was aware these digital relays are polarised so I swapped the wires around on the 7i76e and it is working perfect.

So I wonder if problems some people have been having using digital relays is becasue they have the wrong polarity?

I'm going to leave it this way and see how it goes...


I did a search for "diode" on each page of the thread after the above was mentioned but nothing came up so I assume the following has not been mentioned.
Components like MOSFET transistors, which is what MAY be used as the "contact" in a SSR relay, or the outputs on Mesa boards, often have an internal diode across them. It's polarity is reversed so that it does not conduct when the MOSFET is wired the correct way. However, when it's wired backwards, it's effectively a conducting diode (i.e. a short circuit or closed switch) across the SSR output. If that is what is causing it then polarity is everything in some SSRs. I won't go as far as saying all SSRs because I simply don't know, but if the output is polarised make sure it's connected correctly.

Keith
Last edit: 22 Apr 2021 21:45 by beefy.

Please Log in or Create an account to join the conversation.

More
22 Apr 2021 22:09 #206838 by rodw
Beefy, could you share the map of connections to the Mesa pins and the CPC now you have the correct polarity? It would be good to have a definitive mapping for a Hypertherm machine.

Please Log in or Create an account to join the conversation.

Moderators: phillc54
Time to create page: 0.142 seconds
Powered by Kunena Forum