Basic Care of LinMot Stators, Sliders, and Motors
Jeff Bert, Technical Support Manager
One of the most impressive things about LinMot linear motors is their long life. Properly applied, a LinMot motor can last for over 2 billion cycles (yes billion)! Following are a few things to consider when trying to get the longest possible life out of your LinMot linear motor.
The most important thing you can do to maximize the life of your LinMot motor is to align the motor properly with your load. Even small amounts of misalignment can cause large side forces, which greatly reduce the life of your motor. How to check? The most basic way is with your hand. Turn the power of to the motor (safety first!) and simply move the load with your hand. If it moves smoothly, with little effort, through the entire stroke of the motor, then you probably don’t have a problem. If you feel binding or sticking, especially at only certain positions, or if it’s difficult to move, you need to check your alignment.
Contrary to popular belief, LinMot sliders (i.e. the rod) don’t magnetically hover in the center of the stator. To minimize wear and friction, use lubrication. LinMot sells grease specifically chosen to work with our motors. It’s even food safe! But if you want to use your own, we recommend a synthetic lubricant (so it doesn’t get sticky with age like petroleum-based lubricant can) that’s safe for plastic. Lubrication should be done at intervals specified in the installation guide. If you can’t lubricate periodically, make sure you at least lubricate the motor when it’s installed. Also, you might consider use of our Heavy Duty sliders (not available in all configurations). These are coated with titanium nitride, which makes the slider tougher.
DIRT AND LIQUID
LinMot makes three different styles of motor: short, standard, and stainless steel. Our short motors are designed to be used in generally clean environments. Our standard motors are very rugged (IP67) and work well even in dirty environments. They will take splashing or even a light wash down, but they should not be operated in applications that are constantly wet. If you have constantly wet application, or you require high pressure and/or high caustic wash down (like in food applications), use our stainless steel IP69K motors.
FERROUS METAL SHAVINGS
The slider in a LinMot linear motor is actually a series of strong magnets. If there is metal shavings or dust close to the motor, it will find its way to the slider, where it will cause problems. These applications require some type of shielding to protect the motor from magnetic particles.