Kinetix 6000 Goes opposite direction on power up

[davidhinch]

Installed 4 axis system, one of the drives (Kinetix 6000) runs a conveyor. Sometimes if the power is cycled and control restarted the conveyor runs the wrong way. The MAM instruction is used in Auto only and has a 0 in the Move Type. There are jog instructions for forward and reverse but can only be used in manual mode and panelview pushbutton.

Any thoughts??

 

[kekrahulik]

Guessing that you don't have issues with the jog - just the MAM.

Move type 0 means "absolute".

My guess is that when you cycle power, the servo is losing it's position. Upon repower, it suddenly thinks it is forward of of the commanded MAM position - thus it moves in reverse to get there.

If the move were incremental, the instruction then defines the direction. That move would always be in the correct direction.