Hello, I am looking for a better understanding of the servo setup on theses machines. To be specific how the the different setting relate to each other. DD has provided me with instructions on how to do the task but I am having issues with the final step of having the kv balance out. I will start by saying that the machine is running good and I don't seem to have any blatent issues with any of the axis. I did a cleaning of the tach on the y axis so I decided to check the setup on the board. When performing the setup the procedure calls for setting the offset first which went fine. The pot needed only slight turn to have my numbers to stay at 1-0s then I set my drift which also was only slight 1 and 2's. Then I proceeded to set the tacho pot. In the out line it says to set the pot while in 10% jog mode and adjust the tacho pot so setting 800, 801 and 802 all read the same at 400. I was able to do this part with very little adjustment as well. The final part of the procedure is to set the kv factor in the controls. This is where I am having issues. It says in the instructions to read theses values by jogging the axis in 100% rapids for about 6" in. This sets the kv values in the control. Specificly settings 850, 851 and 852. My kv factors do not balance, they are suppose to be all the same. My x and y balance but the z is out by about a 100. They are all suppose to be a 1000. So I checked my Bosch boards and happen to have a few extra boards so I swapped the Z and repeated the setup but no changes. I also refered to the Siemens service guide and it says to check the tach adj. So my question is if I adjust the tach in order to get the kv ballance right I would be putting parameter 803 out of balance. So can anyone explaine how theses settings all work together? Also can someone define what the kv factor is and how it works?
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