Not too familiar with Cocoatown machines, but you may need to tighten the belt. Ben Rasmusen of Ptomac Chocolate recommends changing rubber belts to fiberglass. Take a look at his site or DIY on this blog. Good luck !!!
As I understand it, that is true of the older machines, but they upgraded the factory belts on the Cocoatowns a while back. So, I dont not think it is the belt.
I actually sent the machine back to Cocoatown when I first received it, because it was giving off such a strong odor. They did extensive tests and said it was running fine, however it is really altering the flavor of the chocolate.
Thanks so much for your input,
We did a couple of batches of chocolate in the machine returned and we could not reproduce the rubber smell. We even tried using the machine in a closed room for 24 hours. We also talked to few of our customers and they do not recall having such a problem. One possibility we can think of is that the recipe you are using may be more viscous than normal and strains the belt.