|Possible Fault Cause||Solution|
|Bad vacuum||Change oil in vacuum pump. Pump should be serviced on a regular basis.|
Check for leaks in vacuum pipes and chambers.
Check mixing and pouring chamber are pulling equal vacuum levels.
|Dust on waxes or trees||Ensure once waxes or wax trees are made, they are stored in a dry, clean and dust-free atmosphere. Do NOT store waxes or trees in the same room that you weigh powder or invest in.|
|Rough waxes||Ensure excessive talc or release agent is not used, as this will produce rough waxes and therefore rough castings.|
|Under or over worked||Follow the recommended mixing instructions.|
|Not vacuuming flasks after pouring||Ensure flasks are vacuumed for 1 minute after being poured.|