I'm unly running a very small rig (6950 = 250 Mhashes/s).
On BTCGuild I got around 0.088 BTC per day.
According to mining-calculators I should get at least 0.14 BTC at the current difficulty. Any ideas what's going wrong?
That step is pretty important because at a price of 22 euro-cent per kw/h mining is already not profitable anymore at 0.088 BTC / day.
Could be Variability. Some days you make less some more then calculator. Also Monitor your miner, make sure he is running 100% all day long. Deepbit and miningmonitor both have stats for this