Hey- Have you check the connections from the safety interlocks for the perimeter guarding to the robot fence circuit? If they aren't connected, that could be causing it.
Posts by Eureka!
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You need the endless rotation option enabled (additional software you have to buy) in order to reset the encoders back to zero instead of unwinding back to a starting position. At some point you will have to reset the encoder but it won't do it every time. Hope this helps!
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Not even looking at the application you want to perform, Kawasaki is at the bottom of my list because the market share is so low that unless you already have an experienced operator, finding one is really difficult.
Next, ABB has been a long standing company and they have really good solid robots, their service is pretty decent and they have a good slice of the market but finding service and parts for them sometimes proves difficult and really I'm looking at ease of use.
Fanuc would probably be my second because refurbished Fanuc robots are all over the place, they're familiar, and they last a long time, some 15+ years! But if you buy one, to get any type of service or support from them you have to purchase their licensing or you have to find an external company to work with which is what my company does a lot because licensing can be a huge and unexpected blow to companies' budgets. Refurbished and older parts are easy to come by but they have a pretty tight leash on their new part supply.
KUKA is relatively new but they have great support and when you buy the robot, you buy the support too. They're really solid machines and they're capable of a lot of tasks. While there aren't many refurbished ones out there, they are slowly gaining speed in US manufacturing plants. Google Tesla Kuka Robots for an example.
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In terms of familiarity, Fanuc has such a market share that the likelihood of finding someone experienced in Fanuc programming is high. As for simplicity and ease of use (for programming only), Fanuc, Motoman (for the most part), and OTC are all winners because the programming is all there on the pendant. You don't need additional software to perform specific tasks. On the other hand, for more "exotic" programming to reiterate the above mentioned, KUKA has a plethora of options for programming, however, not all can be performed on the teach pendant and have to be done externally.