JVL QuickStep closed-loop integrated stepper motors

They do this with greater efficiency and less motor heating because motor phase currents are regulated up and down according to need. Performance of the closed-loop steppers are similar to servo motors, but with higher torque and often without need of gearboxes, reducing costs.

Oyostepper is a true closed-loop control system that compensates step angle errors during a movement and correct errors within a full step. If load becomes too high speed is lowered and position errors will always stay within two full-steps. Smart digital design and very high update rates (36 MHz) means there is no need of any manual adjustment or setup. It works like a perfect stepper motor benefiting from the servo motor technology. Advantages compared to open loop steppers include position feedback and control, fast and easy commissioning with no tuning needed, no stalling or step losses, faster positioning and more cycles per second and more. Advantages over servo motors include very high torque at low speed, often three to four times higher in the same motor flange size; very high ratio of inertia, often up to 40:1; faster commissioning, with no tuning needed, same price as open loop steppers and total stiffness at standstill, with full holding torque.

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https://www.playbuzz.com/item/243ef9d0-b027-49ef-bc83-9354d49f451f

Spectrum External Motor Planetary Gear Motor

For the DIY'r, these gear stepper motors allow you to drive a dolly or other custom motion control accessory through the M3/M4  ports on the side of your spectrum.

The 14:1 Motor has:
  Efficient stepper motor planetary gear Drive
  8 mm mounting shaft
The Direct Drive Motor has:
 5 mm mounting shaft

Both Motors have a short lead spectrum connector with strain relief. This allows you to plug into the AUX port of the spectrum with no soldering or crimping.

Extension cables are not included and are needed.

Motor Speed

14:1: Strong enough to do video and timelapse moves up slopes and vertical. Slower motor.
Direct Drive: Our fastest motor and what we pair to the shark slider for interviews. Great for all horizontal moves and turbo mode.

ADVANTAGES OF A CLOSED-LOOP STEPPING MOTOR SYSTEM

How to make 5-Axis CNC Machining

Whether you’re sculpting a masterpiece from marble or milling a blisk from titanium, the basic principle is the same: start with a block of material and remove the unnecessary bits until the target object is all that’s left. Of course, the details of that process are much more complicated, especially for 5-axis machining.


What is 5-axis CNC Machining?
In the simplest terms, 5-axis machining involves using a CNC to move a part or cutting tool along five different axes simultaneously. This enables the machining of very complex parts, which is why 5-axis is especially popular for aerospace applications.

However, several factors have contributed to the wider adoption of 5-axis machining. These include:

A push toward single-setup machining (sometimes referred to as “Done-in-One”) to reduce lead time and increase efficiency
The ability to avoid collision with the tool holder by tilting the cutting tool or the table, which also allows better access to part geometry
Improved tool life and cycle time as a result of tilting the tool/table to maintain optimum cutting position and constant chip load.

What are the Axes in 5-Axis?
We all know the story about Newton and the apple, but there’s a similarly apocryphal story about the mathematician and philosopher, Rene Descartes.

Descartes was lying in bed (as mathematicians and philosophers are wont to do) when he noticed a fly buzzing around his room. He realized that he could describe the fly’s position in the room’s three-dimensional space using just three numbers, represented by the variables X, Y and Z.
This is the Cartesian Coordinate system, and it’s still in use more than three centuries after Descartes’ death. So X, Y and Z cover three of the five axes in 5-axis machining.

What about the other two?
Imagine zooming in on Descartes’ fly in mid-flight. Instead of only describing its position as a point in three-dimensional space, we can describe its orientation. As it turns, picture the fly rolling in the same way a plane banks. Its roll is described by the fourth axis, A: the rotational axis around X. (1 axis cnc kit  or mini 4 axis cnc kit)

Design of Controlling System for Linear Stepper Motor Based on DSP2407

into linear micro-step motion directly. In condition of open-loop, it can provide accurate and reliable straight-line displacement, velocity and acceleration control, and it can be used to constitute an open-loop system without feedback. However, due to its structural characteristics, there were some shortcomings as follows [1-2]:

(1) It can not automatic accelerate and decelerate smoothly as DC motor and AC motor, out-of-step or blockage will appear probably in circumstance of high speed and large variation.

(2) Its Whirling speed is not steady enough, step angle is overlarge, especially, and concussion phenomenon will appear occasionally.
Focus on shortcomings of linear step motor, this paper carry out two optimization for the application of its driver: control the process of acceleration and deceleration when speed (pulse frequency) of system fluctuate largely; Providing subdivision function for the system, which can promote positional accuracy and steady degree at lower speed; Theoretical analysis and experimental results show that system’s dynamic and static performance has been improved noticeably by optimization design.


2 Control System Configuration
As the core of the system control unit TMS320LF2407A was used to achieve a signal generating.TMS320LF2407A was a powerful general-purpose I/O port and PWM
336 H. Zheng and W. Cui output function, it can output a 16-way PWM waveform. PWM frequency change can be realized stepper motor speed and position control [4-5].

Control signal was used to set up the linear stepper motor operation mode and software integration of the motor control the start and stop, the positive/negative
circumrotate, acceleration/deceleration and location and orientation. Display circuit with real-time display in the operation of the motor speed, and other parameters. The system schematic was shown as Figure 1.

3 Acceleration/ Deceleration Control Arithmetic hybrid stepper motor started from a low frequency, run at high speed after the uniform. When approaching of another terminal location, the stepper motor run slowdown, and then it could accurately stop in the terminal position. Starting vibration and mechanical impact of route end is restrained effectively. The process can be a variety of variable speed control mode time curve.

Line acceleration/deceleration control Curve was shown as Figure 2 (a). Plans in the segment AB, BC, CD, were on behalf of acceleration, uniform and deceleration. The
letter ‘N’ was behalf of line