The machine has since been removed from production.
Steve Kelly, WorkSafe's chief inspector, said an investigation found the method of operating the machine had been unsafely adapted.
"Instead of accessing the machine via its raised platform and from behind an interlocked guard, a step ladder was used to gain access to an unguarded area of the machinery, against best practice and the direction of the manufacturers operating manual.
"The company's standard operating procedure and risk assessment for the machine were neither monitored or reviewed allowing this adapted method of cleaning the machine to go unchallenged and uncontrolled.
"Hellers' failures to ensure employees were carrying out work safely put workers at very serious risk, and in this instance, led to a worker suffering from life changing injuries."