Oh I forgot to mention. If the wood that was used in this machine was made with anything but just plain heat treated wood. Any glue, pesticides, fungicides, or materials used in processing the wood. Will also leach out into the food when it is heated up. So there is that too which needs to be strongly considered. 

Overall I applaud you on your idea. Now please, I'm begging you, retire it. Stop processing your food immediately and get it tested. For chemicals and heavy metal toxicity. 

You might even be able to genuinely ask the nostr community for help via zaps. That can pay for lab testing, or a food safe dehydrateor. If you need help.