7i80 and 7i77

I tried both, but only a big reduction of the speed works. Long ago I have read, that the 7i80 only allows a maximum output frequency of 1 kHz. Actually I am below that.
If the board can't really work much faster, I must throw it away (and use it in my minilathe Emco C5. For this it should be fast enough.
My 24V PS is an old one from an Apple laptop, if its better I can change it to a 5 or 10amps SPS.

uli12us wrote: I tried both, but only a big reduction of the speed works. Long ago I have read, that the 7i80 only allows a maximum output frequency of 1 kHz.

With a 1kHz base-thread you will only get 1kHz out of the GPIO. But that would only effect motor speed if you were using software step-generation and step-dir servo motors.
If you are using a Mesa stepper card (and there are some hints that you are) then step rates of 10MHz are possible. That's plenty fast enough for anything.

The subject of this thread is "7i80 and 7i77" and at the beginning you said that you were using DC servo motors, but were going to change them to step-dir servos. Skimming through the thread it seems that you might now be using something else?

Can you clarify what your actual hardware is at the moment, what Mesa cards, what motor drives and what motors?

Increasing all the ferror and min_ferror limits can _always_ be made to work
to prevent joint following errors.

If they have to be increased to really large numbers this indicates some other setup problem

The 7I80 can generate step rates to 25 MHz, the step _rate_
can only be changed at the servo thread rate (1 KHz typically)

Also a high current field power supply is not needed for testing
and may be dangerous if you make a mistake. 100 mA at 12V is more than enough for testing

Andy, you are right, I need 7 dc controlled motors with a 7i77 and a 7i80 additional I would use a 7i76 that I have changed now with the combination 7i76e. At the moment I try to bring these board to do what I want, after that I connect the 7i77 (and the additional 7i84 for more IOs) The steppers were at the moment only for the possibility of a additional horizontal dividing head above the vertical roundtable. Eventually, if that don't works good with the analog output of the 7i76 I can drive my toolchain with a stepper motor as well. Speed isn't an issue in this case, normally the tools were immediatly before or behind the used tool.

PCW I brought it to run with inch parametres, but now I try to change it to mm, another thing some of the chips are really hot.
I have tested it with an infrared Thermometre and it says 140F. Is this ok.

Hot chips probably means the card has been damaged

uli12us wrote: Andy, you are right, I need 7 dc controlled motors with a 7i77 and a 7i80 additional I would use a 7i76 that I have changed now with the combination 7i76e. At the moment I try to bring these board to do what I want, after that I connect the 7i77 (and the additional 7i84 for more IOs) The steppers were at the moment only for the possibility of a additional horizontal dividing head above the vertical roundtable.

Which motors are turning too slowly?

I think I have only changed too many parametres in one step for the metric machine. Now I'm at the inch and change the values, that they are compatible with metric. 15m(600")/min and an acceleration of 1m(40")/s² seems ok. Maybe on the real machine I must decrease the acceleration to the half or so, because there are some hundred pounds to move.
Instead of 10.000 steps/" I tried 25.400 so I have a direct metric equivalent.

PCW, I try my bigger PS, eventually the small part have a dirty tension, so the chips heat up.

Now I try to get the spindle running, but I have always the same problem with missing hal parametres. I have tried to enter these keywords in the inifile, but that don't works.I get always the error "Parameter or pin .... not found.
What can I do, to bring the spindle to run.

Unfortunately I haven't found in all the demofiles a single file in which the spindle is defined. I can't believe it that all machines have a simple switch on/off spindle without any feedback.

Hi people, I'm new to the forum and newie in LCNC.
Since last year I own a machine with a 6i25 and 7i77 working ok and made my first learnings as a user
Due to some tecnhical issues I want to solve (by myself if possible) and new functionalities I want to implement, and posibly build another machine, I bought a 7i80DB and another 7i77 which im trying to make them work

So far I think I have the 7i80 running ok.
After initialization I get the message
hm2/hm2_7i80.0: registered
then the Axis interface pops up ok...
the ethernet led blinks happily ...
and I can see the (gpio) pins ok
and also activity in the gpio058 (guess has something to do with the mux.. ?)
.. but ... anyway...
now I'm triing to find out how get / map pins into the 7i77
trying to look for someting like hm2_eth....0.7i77.0.0....
to net thinks like
net x-home-sw hm2_5i25.0.7i77.0.0.input-00
and don{t know how
i cant see an option in pncconf to build a 7i80 + 7i77 config
and -almost - run out of ideas
should I map them manually ? (with the info found here linuxcnc.org/docs/html/man/man9/sserial.9.html )
or can this be a hw problem ?

(i've flashed the 7i80db_25_7i76x2_7i77x2D.bit)

sorry for my english..
and many thanks in advance for your help

regards from Uruguay

franco_uy wrote: now I'm triing to find out how get / map pins into the 7i77
trying to look for someting like hm2_eth....0.7i77.0.0....

The first thing is to get a pin list. With LinuxCNC up and running open a terminal and type You can copy and paste that from the terminal window into a text file for future reference.

should I map them manually

If pncconf can't do it for you, you might have to.

(i've flashed the 7i80db_25_7i76x2_7i77x2D.bit)

It might be that the 7i77 is connected to the wrong connector on the 7i80. From the bitfile name I would expect the 7i77-compatible connectors to be the higher-numbered ones.

If you look in dmesg immediately after LinuxCNC has started you should see what all the pins on all the connectors are doing.