The Health and Safety Executive (HSE) launched an investigation into the 12 March 2015 incident and found it was common practice for workers to defeat the machine's safety interlock while it was being set up.
The employee who was preparing the press inadvertently activated the press and it crushed the tips of his index finger and thumb.
The HSE also found Walraven's risk assessment for the work to be inadequate and irregularly reviewed.
"It [the risk assessment] should identify the risks associated with all aspects of a machine's operation including setting and maintenance. Had this been the case then the defeated interlock would have been identified and suitable control measures put in place," said Leon Donovan, an inspector for the HSE.