Hi Craig,
It was not of course 0 but what i meant was it was very close to zero, actually what i meant was this;
https://www.youtube.com/watch?v=fzHWudx2wgUbut the strange thing is, this happens my case in the opposite way. When i adjust the vfd as vector drive there is no torque in low speed, but when i change it to v/f mode there is torque and u can not stop the shaft with hand.
As u suggested before i gave up from the idea of intalling an encoder at the end of the shaft, but now if i want to implement the ATC function i need to align the shaft of the spindle to an angle.
The reason is the drive dogs on the tip of the spindle has to go in to a slot in the bt40 holder(at the atc side). So to do this i need to stop the spindle shaft at a point lets say parallel to x axis.
As u know Delta Vfd s has encoder cards PG01 i think or something like that, i thought matbe i install an encoder on the shaft and connect it to vfd through this encoder card it may be possible to stop it at a count number of the encoder. For example if i is 1024 pulse per turn i can program the vfd to stop at pulse 512 in every stop command. I asked this to the Delta support in here they say it is not possible on VFD-E series but it is possible with VFD-C2000 series. But in VFD-E booklet it says u can make speed and position control with this card so i am confused.
do u know anything about this? i attached the related portions of the booklet.
If this is not possible according to u too, can u think of anyway other than the mechanical option?
Thanks in advance.
Hakan