Some of you actually wondered, what those `robot parts` quest was and what was it about. Ok, here we go.
During your adventuring, in certain dungeons you would find parts of robot (which is actually Trill-Bot 4000). Finding first one of them gives you the quest `Robot Parts`.
Widow's Veil (Act1). The one with giant spider as a boss. To Open a passage you'll need to light all the braziers scattered around the level. You'll get Robotic Drum.
Tower of the Moon (Act2). There are brass gongs, you need to hit each one of them with weapon. You'll get Robotic Arm.
Blood Hive (Act2). Level with lots of Skaras. On the last level of the dungeon, where the boss is, smash all the roach eggs. You'll get Robotic Pipes.
Abandoned Sawmill (Act3). The one with werewolves. On the level there are 4-5 skeletons pinned by knifes and axes to trees and walls. You'll have to free them. Robotic Body this time.
Cacklespit's realm (Act3). This is a tricky one. To get there you'll need to go through a questline, that is triggered by finding a bell in the marshlands, and placing it in its proper location. Eventually you'll get to Cacklespit's Realm, and there you'll need to destroy all the tree stumps on the level.
After gathering all the parts of robot, it can be assembled by Professor Stoker (the archaeologist) in the 2nd act town hub. For me it happened after i brought him Power Source after completing EmberForge.
Voila - now you have your own mechanical bard at your disposal. He would be still, erhm, damaged, though.
In my playthrough he almost at once gave me a quest `3 sisters` to find and kill the incarnations of Marishka, Verona and Aleera in the newly opened dungeon. No other quests yet (i'm level 50, game not completed yet).