VDF triping my limits

This is the next part after my problems with my limits home and estop switch's..

To my problem i have now got my machine doing most of what it should be doing with out triping a switch and making me want to sell it.. But this is all with out the spindel motor running i have now found that this is a lot of the problems im having so how do i get round this problem. The wiring is all out of the machine to move it away from every thing else how fare should i have the vdf away from every thing else what wire would be the best to use.. Im useing a brand new tyco minicon all i have done to it is up it to 100hz to get the speeds im after does any one know any setting i can change with help ? Im getting there but i didnt thing it would take this much soddoing about i do hope some one can help.