Brother TC-225 / TC-229 adventure!

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01 Aug 2017 13:02 #96832 by ihavenofish
I have no internet access in the shop, so I went home. bringing the new firmware to the shop tonight.

I'm in no rush to break anything :)

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02 Aug 2017 03:47 #96876 by ihavenofish
alrighty, tonights update:

I found the pin to engage the relays on the relay board. you need to tie that pin to 24v GROUND. if I do that direct to the psu it engages each one, all happy like.

of course the mesa wont engage them, because its trying to output +24v on that line.

how do I go about making the mesa do this correctly? is it a setting or is it some external hardware?

thanks

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02 Aug 2017 04:59 #96877 by rodw
Probably the easiest way would be to use a relay triggered by your Mesa card to switch to ground.

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02 Aug 2017 05:17 #96878 by ihavenofish
so a relay to engage a relay which in turn engages a relay....

do I also need a relay on all the 40+ inputs? seems like there should be a better way to do this.

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02 Aug 2017 06:20 #96879 by rodw

so a relay to engage a relay which in turn engages a relay....

do I also need a relay on all the 40+ inputs? seems like there should be a better way to do this.


Well a transistor is a relay by another name. :)

Electronics is not my forte.

But the Mesa 7i72 sounds interesting. 48 sinking outputs which is what I think you need.
mesaus.com/index.php?route=product/produ...th=72&product_id=106

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02 Aug 2017 11:38 #96895 by andypugh

so a relay to engage a relay which in turn engages a relay....

do I also need a relay on all the 40+ inputs? seems like there should be a better way to do this.


Can you remind us what Mesa hardware you have, and what hardware you are trying to control?

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02 Aug 2017 13:03 #96899 by ihavenofish
I have a 7i77

I'm trying to control a brother :P
the brother io runs through a relay board mostly (even if they don't touch a relay). most of it are inputs that go directly to things like limit switches, or the atc encoder or thermal sensors or buttons from the front panel.

the outputs are mostly to relays - about 7 in active use, but a dozen or so for spare m functions. the output to these relays is on the ground side - to the minus pin on the relay. some of the outputs go to solenoids (coolant, at blast).

for inputs, I guess we are just active low? so that's not an issue. for the solenoids, I can reverse them to be engaged on the +24 side as they are wired separate from the relay board. but the relays are not easily altered, they have diodes and some inter dependence (one relay engages another etc)

thanks

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02 Aug 2017 13:23 #96901 by ihavenofish
7i72 I think is indeed what I need!!!! I bought the 7i84 for extra inputs though. I don't think I can run both can I?

/me counts inputs

1 e stop
2 lim x+
3 lim x-
4 x home
5 lim y+
6 lim y-
7 y home
8 lim z+
9 lim z-
10 z home
11 atc home
12 atc area
13 start
14 hold
15 spindle temp
16 system temp
17 atc enc 1
18 atc enc 2
19 atc enc 3
20 atc enc 4
21 atc enc dec
22 mpg incr 1
23 mpg incr 10
24 mpg incr 100
25 mpg axis x
26 mpg axis y
27 mpg axis z
28 mpg axis a
29 mpg a+
30 mpg a-
31 mpg b+
32 mpg b-


add to that the alarms from the drives and from the safety board, and the torque monitor feedback from the drives and we do need the second io board 7i84 (we could wire the limits together etc, but I don't really want to).

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02 Aug 2017 13:24 #96903 by andypugh

I have a 7i77
...
the outputs are mostly to relays - about 7 in active use, but a dozen or so for spare m functions. the output to these relays is on the ground side - to the minus pin on the relay. some of the outputs go to solenoids (coolant, at blast).


The easy (but not cheap) answer is probably:
store.mesanet.com/index.php?route=produc...83_88&product_id=115
Which can connect to the expansion port on the 7i77.
For more flexible wiring options, and even more money, there is:
store.mesanet.com/index.php?route=produc...83_88&product_id=110

A much cheaper option is probably one or more of these: www.ebay.co.uk/itm/222299665327

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02 Aug 2017 13:31 #96904 by andypugh

7i72 I think is indeed what I need!!!! I bought the 7i84 for extra inputs though. I don't think I can run both can I?


The 5i25 has a second header. You can add a 7i74 to that and have eight more smart-serial cards. That should be plenty.

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