KMC Forums - 80-90 killer robot maid on ceiling tracks

Ok so seen this movie forever ago i was probably 8-9
Here is the jist of wat I can remmeber i hope someone can help me out

Basically a family father son wife, someone makes a nanny/maid robot to help around the house. she is suspended from tracks on the ceiling that allows her to go into all the rooms to do work etc. then either the wife dies and becomes the maid robot or the robot herself just become super evil and starts grabbing knives with there hands she has built on and i think kills a few people and i think i remember at the very end she was hunting down the son last and it ended with him screaming and the robot kind ofevil laughing and maybe kills him im not sure.
I also kinda remember them being in a big city and definitly 80s maybe 90s based off their attire.

Anyone have any ideas?