which card to buy

If the encoders read properly (right direction and scaling), dont change them

Have you read this?

gnipsel.com/linuxcnc/tuning/servo.html

Thank you, I did lower the P value and now all the servos move really well and the tremble stopped, now I will work on getting the right scale on the encoders before I continue with the proper tuning, I also tried them one by one because I did not have enough cable.

now for the smart serial cards I have not connected them yet I got 3 straight cat 6 cables to start working with them I have got the 7i70 7i71 and 7i73
I don't know if the straight regular cable will work or if I need some special kind of configuration.

Plain straight through Cat 5E or Cat 6 Ethernet cables are fine
( Cat 5 is OK but will have more 5V drop if _really_ long )

Hi I did a rough tuning an got it to move, I still have to get the fine tuning to get it as smooth as possible.


I also got to run the sample gcode so the machine really did something since 2013.
I don't have the endstops wired yet, I will work on also get that going, but if you notice on the video the z axis is running backwards, I don't know how to change that, I'm sure it is not wiring something backwards, where I could change that? I still have a lot to learn.

thank you for your help.

To reverse a analog servo axis you need to do two things:

1. Change the sign of the encoder scale (or swap the A/B encoder leads)
2. Change the sign of the analog output

Hi I am now working again on the machine, I have all the axis working and the smart serial cards working an recognized, now I'm a bit confused on the home and limit configuration, the machine has a home switch for every axis on just one side of the machine, and also it has a limit switch on both sides which is wired in series on every axis and also with the E-stop button
I have created a new configuration now with the signals for the home and limit switches connected to external inputs and the axis interface changed from a home button for each individual axis to a button to home all, I don't know if I'm doing it the right way.
I don't know if I'm calling it backwards I'm considering the home signals for the home routine and one for every axis and the limit switches as one because they are in series.

I run out of cable to connect things so I will continue today.
the confusion started because when I tried to get a new configuration with PncconfWizard and connected external pins for the home and one pin for the all limit switches and on the new axis interface appeared a button home all instead of the individual home I had before so I tough I got it backwards and was taking the home as the limit and do on, but now I will try it connected now that I think I know what I'm doing.

I'm also on the process of research on how to manage the tool change, it is done with pneumatics so is a mater of truing on and of some outputs but I have to manage the offsets and things like that I will try to fit part of it on a pyvcp panel or something.

I was about to test the external inputs but I had a cash that render the system useless, I had to install Linux again, I managed to rescue the calibration files for the axis that I did before
now I'm back on track, I will now try to clone my installation using clonezilla

Now I will finally test te external inputs and the home routines
but I have a question, is it possible to get the 5v for the 7i48 and the 7i44 from the pc power supply? I'm using a corsair VS450