I ordered some NEOs and Spark MAXes earlier this week when the MAXes came in stock at REV, and I have a few questions/concerns as I try to get the first one set up.
NEO: I found that the shaft was slightly oversize and the keyway was slightly undersize compared to CIM and mini-CIM. I am mounting this into an AndyMark toughbox series* gearmotor. I have always been able to install keyways and pinions by hand, and only needed a tool (usually a nutdriver) to push the retainer clip in place for both CIMs and mini-CIMs with about 5-10# of push. With the NEO, I had to use slip-joint pliers to get a 2mm key from AndyMark into the keyway. LIkewise, the AM 14t pinion did not push onto the shaft with fingertip force. While I did not need an arbor press or even a vise, I found it necessary to mount the motor to a gearbox motor plate, set that in a workbench/vise, and push down with about 30-50# of force, using a nutdriver - significantly more difficult than putting a 14t pinion on a CIM or miniCIM. Is this normal, or do I somehow have a “swollen” NEO shaft? Should I have taken the “can” off to do a press fit at this amount of force, as required for the smaller pinions used by the latest generation gearboxes?
OK, also a MAX question. Where is the heat sink? Placing a finger on various spots on the outside of the (never used) controller, the black patch on top with the words REV ROBOTICS SPARK MAX is the only place which feels cool. Is this the heat sink area?
* Specifically, a TB 3-motor gearbox, one of the ones with a 1/4" aluminum motor plate, though I doubt that this matters here.