Another Elumatec SBZ130

Hello,
my name is Benno, I'm new to the LinuxCnc-World. I want to try, to rebuild the project of tommylight. Elumatec SBZ130/01
Now I want to order the hardware but I can't get a 7I71, my question is, can I use 7I66-24 instead of this? I know it has half outputs but it should be enough. Do I need another bit file? I think, I can save up the extra relays.
tommylight wrote:

Will have to add a bunch of small relays as the brakes draw 0.68A and the 7i71 can deliver 0.3A per output, no big deal at all just more wires. That would take care of the field power having 28.6V and 7i71 has 5 to 28V outputs and i do not like pushing electronics to it's limits, much safer this way.

Is it just a "little" change in the hal files?

I'm happy about any suggestion and I hope you understand my english

Thank you for your reply.
I will order tomorrow and then jump in the cold water. My plan is a 7i70 for input and a 7i66-24 for output, I need exact 24. But if I have somewhere a mistake in my mind, can I use the IO oft the 7I77?

tommmylight wrote: You do need a custom bitfile, should be in the topic you linked

That means, it does not matter for the Card/Bitfile which device is connected to the SSerial?

Hi Tom, thank you for your support!!
I made some pictures for you, I think it is the same as yours. When I'm thinking on the encoder I get headache, they are all the same type but have different values. In the last row, the left value should be the count per revolution (there are some 1024 and 4096). But what means the second value: Anz. U (Anzahl Umdrehungen? Number of revolutions??) There I have a 1 on the spindle, the other are 64 and 4096. Do I use the direction pin on the long x-axis. I saw you have had some troubles with the encoder, but I can't follow it. I have to read it again.
Later, I will order the parts (6i25, 2x7i66, 7i70, 7i74, 7i77) and some mounting material. Then the next step is trial and error
The machine is in a bad condition, it is some years unused and stored on top of each other, many air hoses are broken. I hope the winter is long enough.

tommylight wrote: It sure looks like it is the same, but where are the other parts ? Mine was over 7 meters long and 5000KG heavy!

It is disconnected in the middle. The main part is standing on the other with some pallets between.

tommylight wrote: you have a full working config for it

Without your great preparatory work, it would not have occurred to me to repair this machine. I would have suggested my friend take them apart and sell them. But that's still plan 2.
Once again, thank you very much for your hard work and all other people which helped you.

Hello Tom,
I got the Mesa cards, the guys in Portugal are very quick.
I wired them on my desk (only the boards), changed the hal files to make the 7i66 work, installed emcochanger and linuxcnc started without problems. Happy!!

Now I wanted to ask you about the encoder wiring. Is it correct to supply the encoder with 24v and to connect the clock and data lines directly to the 7i74?
I read something in the data sheet of the 7i74 about +/- 12V and the output is 5V on the RJ45. I became a little cautious because I did not set the jumpers of the Mesa cards correctly and they almost went up in smoke but luckily the power supply switched off due to the overload and the cards survived.

Furthermore, it would be interesting how you solved the long x axis? Are you using a modified trivkins Kinematic or is it controlled by the Cam System's post processor?
I took a quick look at the Sheetcam postprocessor, I'm not sure if it makes sense but as andypugh suggested adding up the two axes. Perhaps using the post processor to divide the axis into several sections?
True to the motto:
if ((x> area1) && (x <area2) {
G0 U Position1
...
} ??
I hope that doesn't all sound completely stupid!

When I saw Linuxcnc (EMC2) for the first time at a friend's house about 15 years ago (hot wire cutter) I didn't think that I was so intensively involved with it. Normally I use Estlcam, it's just plug and play and an Arduino isn't that expensive when it burns down .
Thank you for your help.
If I don't get to write anymore: Merry Christmas to everyone.