Hi friends, I am happy to tell you that we have finally suceeded with the autorot. We installed the autorot configuration file from Dayhawk, and initially the tractor was not even able to drive straight in the parallels, moving like a snake from left to right. That day we were very frustrated, but the following day we tried again with the same Dayhawk configuration file, but before starting to move, we went to the menu of Cerea to press recuperar motor (motor recovery) with the direction weels straight, and started the Cerea. Then the straight guidance worked almost perfect and the first cabecero (vorgewende) was done. With slight adjustments on the passperdegree to finally a number of 200 then all the cabeceros were done perfectly.
The explanation for the low passperdegree of 200 is because the phidgets motor in this case is not acting over the tractor direction wheel, but to the axis bar of the direction, with a gear wheel of only 7cm diameter.
As a conclusion I can say:
1) The configuration file from Dayhawk works OK (obviously, adapting the passperdegree to each different tractor)
2) Before pressing start inside the Cerea program, it is needed to press recuperar motor(motor recovery), with the wheels aligned straight, so to make the passperdegree adjustment to zero.
3) After above, press start on Cerea.
If you dont press motor recovery, the Cerea will find the Zero position of the passperdegree by himself, but only after a time moving the tractor like a snake. If you dont know this, you may think that the configuration of parameters you have is wrong, so you will start making modifications on the configuration with wrong results, and this of course, will make you crazy, which happened in our case.
The next step for us is to find a way to recover motor in a more automatic way....
I take this opportunity to say many thanks to this Cerea forum for the help, and specially to Dayhawk and Wade.
Keep in touch