PlasmaC questions new setup

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23 May 2020 09:32 #168674 by rodw
Replied by rodw on topic PlasmaC questions new setup

Clive S wrote:
I take it will be all open source :) :)


Well when I look at what you guys have done to Path Pilot whats the point in not going that way?
There are many fabricators who can build a table and want a prebuilt controller. Sounds like you know someone like that!
I've seen a few eyes glaze over when I open the Spaceship control cabinet!

I will say though that what we have learnt about stepper motor design is cutting edge and has rewritten everything that I thought I knew on the subject through my seat of the pants spaceship build. So we are talking about adding a lot more value than a prebuilt controller. Geeze the wiring gave me the Sh!ts! And its still doing my head in as I work through how everything needs to go together!

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12 Jun 2020 15:11 #171262 by Clive S
Replied by Clive S on topic PlasmaC questions new setup
OK the Hypertherm 45xp is on the way.

I have used the online calculator jscalc.io/calc/NTr5QDX6WgMThBVb

It produce these:- Started with this on the back of the THC-10 0V = 116.4 10V + 965.3

This is the result Scale 0.01130875 and offset 3637.5000 Does this look correct as I seem to have used a 9V battery last time

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12 Jun 2020 15:19 #171263 by tommylight
Yes it does, for a 30:1 divider.
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12 Jun 2020 15:23 #171265 by Clive S
Replied by Clive S on topic PlasmaC questions new setup

tommylight wrote: Yes it does, for a 30:1 divider.


Thanks Tom. I left that bit out to check if you was really checking B) You passed:woohoo:
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12 Jun 2020 15:30 #171268 by Clive S
Replied by Clive S on topic PlasmaC questions new setup
One more question

will I need a relay with the 7i96 for the arc transfer pins 12,14 on the cnc port as they are ssr on the 7i96 TB-3 pins 13,14

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12 Jun 2020 15:37 #171270 by tommylight
You mean for the torch on?
Arc transfer should be wired to an input on the 7i96.
Not sure if it is required but i always use them to have everything isolated.

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12 Jun 2020 23:00 #171336 by phillc54
Not sure about the 45XP but my 30XP torch on signal is 18V so I switched it directly from the 7i96.

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12 Jun 2020 23:28 #171342 by rodw
Replied by rodw on topic PlasmaC questions new setup
You should be fine with the internal relays. the outputs are 36 volt 2 amps, way more than what would be use.d

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13 Jun 2020 08:44 #171379 by Clive S
Replied by Clive S on topic PlasmaC questions new setup

Clive S wrote: One more question

will I need a relay with the 7i96 for the arc transfer pins 12,14 on the cnc port as they are ssr on the 7i96 TB-3 pins 13,14


From the manual:-

Start (start plasma)
Input
Normally open. ...15 VDC open circuit voltage at START terminals. Requires dry contact closure to activate.

Transfer (start machine motion)
Output
Normally open. Dry contact closure when the arc transfers. 120 VAC / 1 A maximum at the machine interface relay.

Voltage divider
Output
Divided arc signal of 20:1, 21.1:1, 30:1, 40:1, 50:1 ... (provides a maximum of 16 V)

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13 Jun 2020 08:56 #171381 by phillc54
Start and Transfer could be directly connected.
If start is the wrong polarity it will be permanently on.
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