Hello,

In newbie to Okumas, and here we have a VMC MB-46VA equipped with OSP-E100L control that has lost home. The initial position was showing big numbers in the three axis, the Z axis was 16187.0mm even the pot was almost touching the table (attached pictures of the screen). The situation was similar for X and Y axis.

Our approach to solve this situation was remove the encoders and plug out the power of each servomotor to recover the position in the control just turning by hand the encoders to get closer to zero position. But when we went near to zero and reach negative positions the control shows +OVERFLOW position and get alarm "1153-01 MCS CON APA deviation X-AXIS" (different number corresponding to proper axis), so we can´t go in negative direction by hand. In the parameter position screen the N TRAVEL LIMIT was +OVERFLOW for the three axis, I changed this values to zero.

Here is our trouble, we have returned the position of the Z axis to home by hand and now if we indicate in MDI G30P1 the control starts to look for home in negative direction until -OVERFLOW position (in MDI the movement in negative direction to reach home is possible), we don´t know how far the position is going to be set. One alternative we have talked is plug out the servomotors again and let them run free until the -OVERFLOW is reached, from there observe if we can move the axis in handle mode.

I would like to hear your comments based on your experience.

Thank you in advance.