At our glossary page, you can find definitions to any words you might find unfamiliar. It will clarify for you some of the more technical words and acronyms that are used on the site.
BB - Baseboards
BLDC - brushless DC motors
Advantages: speed/high RPM operation
Motors are referred to as either closed loop or open loop. Closed loop means that data flows both to the motor and back to the controller, whereas open loop only flows one way. This means that as a closed loop stepper motor system spins, adjustments can be made if there are imperfections in the motor’s operation, such if the motor is given a load that is too large or if the motor is stopped altogether. This way, the controller can attempt to correct these irregularities so that velocity, torque or position can be maintained despite an error.
TRINAMIC Closed Loop Stepper Control:
Up to now, stepper motors have been driven with constant current, but the new TMC260, TMC261 and TMC262 stepper motor driver series detects the actual load of the motor and adjusts the current accordingly. This eliminates the security current margin and also allows a boost the motor, avoiding stall and step loss to improve the reliability of the entire system.
CoolStep in action:
With dcStep™ a stepper motor will act in a similar way as a dc Motor with regard to energy efficiency. dcStep™ allows for auto ramping and turning the motor as fast as possible in the actual load situation.
DcStep addresses stepper motor drives’ needs to maintain positional self-awareness and step count without costly feedback circuitry.
Without feedback circuits, operating margins must be restricted, so that motor torque and velocity are maintained within acceptable levels.
The dcStep technology provides extra torque to match sudden increases increases in load resistance while preserving step count. This significantly reduces previously required stepper motor control system safety margins to increase system or reduce motor size.
intelligent, programmable controller
compact by using newest Trinamic chip technology, no cooling nessessary
Motion control without feedback assumes motors always behave as expected. Under common conditions, the motor position of the motor is deterministic and predictable. To cover uncommon conditions, the motor needs to be operated with safety margins, which can reduce efficiency and overall performance.
Advantages: reliability/speed/high RPM operation
Advantages: high level of precision and small discrete microsteps
Trinamic – sensOstep PANdrive demo: direct mode:
When compared to pure mechanical referencing, mechanical stress and noise are reduced.
Trinamic – linear stallGuard™ movement demo:
Trinamic – stallGuard demo:
This gives the user easy and cost effective real-time feedback of the motor’s operation. It enables monitoring of the motion system without additional sensors. This can help to determine the appropriate motor and mechanics during development phase or to detect abrasion or mechanical stiffness in their operation.
Applications where stepper motors are used include linear actuators, mirror, lens or camera mounts, fluid handling systems, intelligent lighting, solar panel orientation, scanners, printers, plotters, 3D printers and CNC machines.
Standard motors have a few real advantages, however, such as the fact that they are very simple and do not need complicated controllers. They also work regardless of the position of the magnetic fields inside the motor. This means that if a load is given to a standard motor that is too much for it, it will still apply resistance even if running the opposite direction. Stepper motors have the problem that if the teeth become misaligned during operation because more resistance is applied to the motor than it can handle, it will lose the ability to apply force. There is, however, a solution to this problem. Many of the controllers that Mocontronic builds have a safety mechanism built in which prevents the system from applying too much current to the motor. It essentially senses the limit to the motor and prevents the motor from being pushed beyond this limit, making sure the stepper motor remains aligned, engaged, and precise.
If you have any questions about stepper motors, stepper motor controllers or appropriate applications, contact us and we would be happy to consult you or simply answer your questions.