Re: 1200mmX900mmX170mm 4axis cnc
Quote:
Originally Posted by
Clive S
The only thing the 72v ps is supplying is the drives so what has the 1mm wiring got to do with it. Also 1mm cable can carry in the region of 10A
Hi Clive S,
yes that is exactly the point.
Normally the current will not go past that, my 1mm2 will only carry power to 1 driver.
Until something goes wrong that is.
When a short happens on a transformer it is capable of more current.
It might smoke my 1mm2 panel wiring i believe.
But maybe the rectifier will blow out first.
In my line of work the secundary fuses also match the spec of the panel wiring.
So i think a secundary fuse might be a good idea.
While is was looking up data on my particular transformer, the datasheet mentions the precense a TCO in the primary windings... so transformer thermal overload is sorted.
Can't find any specific data on max fault current though..
Maybe it can be calculated ... not my field of expertise.
Grtz Bert.
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Re: 1200mmX900mmX170mm 4axis cnc
Quote:
Originally Posted by
Nickhofen
Hi Bert
Thanks for the reply.
The relays that the card has onboard are charachterized as ''signal relays that should never used as power relays, they are intended to convey signals such as fwd and reverse to a VFD ...However please take care , as the contact of these relays can carry a max current of 0.5 amp at 120V AC or 1 amp at 24V dc.The user must use an external relay if the load requirements of the device will exceed the current rating.''
This is why i mention the external relay connection.
To answer the other question you put, I want to connect the maximum I can on this card ,water pump , air nozzle etc.
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I am going for this configuration because my previus cnc was wired like that, if there is a better way of course I prefer it.
You are speaking about traveling proximity switches, right?
Regards.
Nick.[/QUOTE]Hi Nick,
Ask/look around for the multi channel relay boards.
For the proximity switches.
You have the inputs for it... so why not [emoji41]
Grtz Bert.
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Re: 1200mmX900mmX170mm 4axis cnc
Quote:
Originally Posted by
driftspin
Hi Clive S,
yes that is exactly the point.
Normally the current will not go past that, my 1mm2 will only carry power to 1 driver.
Until something goes wrong that is.
When a short happens on a transformer it is capable of more current.
It might smoke my 1mm2 panel wiring i believe.
But maybe the rectifier will blow out first.
In my line of work the secundary fuses also match the spec of the panel wiring.
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your panel wiring really must be able to handle the breaking current of whatever the protective device takes to blow, a slow blow fuse is ideal here, but the wire must be rated suitably - if too thin it will just melt.
1 Attachment(s)
Re: 1200mmX900mmX170mm 4axis cnc
One more add on my diagram.Relay and reset switch.
Attachment 24705
2 Attachment(s)
Re: 1200mmX900mmX170mm 4axis cnc
Finish this today!
No cnc relevant , but since I am a sissy as a friend from NY says:beguiled:, to start my wiring,(When someone has not pay a euro for components see it different,LOL), I build other things!
Attachment 24758Attachment 24759
Re: 1200mmX900mmX170mm 4axis cnc
Nice! What wood is used for the handle? :D
Been watching alot of YouTube vids about knifemaking so maybe I should give it a go aswell ..?
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Re: 1200mmX900mmX170mm 4axis cnc
Hi Robert.
The handle is made from root of Olive tree,those trees are very common here.
Do you watch the competition "Forged in Fire" also? ;-)
Re: 1200mmX900mmX170mm 4axis cnc
After some reading at old threads I place the last orders at Aliexpress for contactor, relays, slow blow fuses, power supplies etc.
I want to say a big thanks to routercnc and driftspin for the help they offer at the backstage, and all the other people of course that keep answering my silly questions! :)
Re: 1200mmX900mmX170mm 4axis cnc
Can’t remember what I did but you are welcome. Just passing it on . . .
1 Attachment(s)
Re: 1200mmX900mmX170mm 4axis cnc
I am thinking to place the parts that way in the control box,will it be any problem with the positioning of VFD?
If I remember correctly people puts shielede cables to the signal wires ,wires that goes to controllers, motors etc. right?
Attachment 25119