A little trick I learned with that company's coin counter: If it is chocking on half dollars, the teller may have a tool that you can stick in it to flatten out the halves. If they do not have the "tool" sticking an ink pen in the tray to "shuffle" them will generally cause them to go right through with an efficiency that coin star would be jealous of.
Don't know how I could do this hobby without a coin machine. I absolutely hate dumping rolls. Mainly because all the tellers in my area are lazy. I can dump $500 in halves in about 5 min. Unless the bag needs to be changed. The machine near me holds $1000 of halves in the bag.
Those are Cummins-Allison. They are really putting a dent in Coinstar's business since people buy these machines and get the full vig instead of only 1.8% of the 9.8% that Coinstar charges.