riging and animation problem

so ive created a basic robotish looking character just out of sphere , cuboids etc and ive watched a few videos on adding bones and i followed them but im having an issue where when i move a bone to move a body part another part moves as well such as when i move an arm half the sphere thats used for part of the body moves as well and i cant seem to figure out how to get the thing properly rigged so i can animated it ,any help would b great

I’m just guessing, but it sounds like you used automatic weights when parenting the mesh to the armature.

If this is the case, you need to either use the weight brush to clean up the mesh or my personal favorite solution, use the properties panel in edit mode to adjust the weights on the vertices that are not deforming properly.

I’m just guessing the above so if what I posted dose not solve your problem, you may want to post the blend file so me or someone else can look it over.