Food?! Robots don't need food, they're robots!
Along with steam, robots need booze to get through the working day. Otherwise their joints become stiff and they work slower. Booze can be imported from spaceports or processed at a still from plants.
Forges. All robots are the same, i.e. they don't have huge drills for arms or anything, so they need a way to make tools. Metal can be made into picks for digging. There are also giant powered drills of some sort, since only having picks wouldn't make sense.
Here's something that could be done by anyone right now: concept art! What do the robots look like? Draw it!
I actually made some concept art. In my head we have several kinds of robots, many of them dedicated to their tasks, then an all-round application, somewhat weaker more expensive to maintain humanoid robot. Ill get to uploading it when i am done with it.
Currently working on:
Engineerbot - Humanoid robot, the dexterity of a human hand is required to maintain machinery
Spiderbot - Spider like millitary bot, use theese to defend your bases.. and ahem.. clear out your embark spot should it already be inhabited by.. other corps.
Peasantbots are humanoid little steambots that has many applications, because of their size and lack of any special strength or utility, they are easy to make, but they break easily too, and require alot of maintainence. Steam of course, but also alot of oil to keep their joints going, and spare parts to replace damaged/worn out parts.
I also thought of enemies:
Junkbots, rogue spring driven robots, starts out with a random set of limbs, theese things will steal parts from moving as well as rusting robots. You have to watch out for theese, imagine one stealing the gun from a spiderbot, that would create havok.
Scramblers, theese are remnants from an ancient civilisation, subterrenean machines, they drill through the planet in search of metals, they usually feed on whatever they find in the earth, but if they can smell delicious alloys, they will attempt to get that.
Tentacles, the limbs of a lovecraftian horror living in the core of the planet, it likes to screw up things, and eat souls
Technophobes, Technophobic natives, they will hunt down your machinery and tear it into pieces, having their heads on stakes at your mine entrance will scare them off.