The main function of the lead screw of the Motorized Linear Stage is to
convert the rotary motion of the motor into the motion in the straight
direction. Electric translation table adopts ball screw or grinding screw. Ball
screw and nut form rolling friction through the steel ball, smooth movement,
high transmission efficiency, easy to achieve high-speed operation, and can
change the diameter of the ball or the use of double nuts to effectively solve
the axial clearance, guide rail is the choice of electric translation platform
movement stability and bearing size of the decisive factor. At present,
Motorized Linear Stage manufacturers mainly use the form of guide: dovetail
guide, cross roller guide, linear slider guide and linear bearing guide. The
electric sliding table USES many kinds of guide rails, but the precision
electric sliding table mainly USES linear slider or cross roller guide.
The body accuracy and anti-environment image ability of the electric
translation platform are most affected by the body material and processing
quality
Features of electric translation table
1. The electric translation table can quantitatively convert the rotation
motion of the motor into linear motion, and its energy conversion efficiency can
reach up to 70%(ball screw). This index is directly mentioned
High load capacity of the electric translation table.
2. High movement accuracy. Positioning accuracy and repeat positioning
accuracy can reach the micron level. For example: if the drive motor for stepper
motor, step away from the Angle of the motor is 1.8 °.
The drive screw pitch is 4 mm. It needs 200 steps to rotate the motor once.
The linear displacement of the stage is the screw pitch. It's 4 millimeters.
Then the motor
Every step. The linear displacement of the electric translation table is
4/200= 0.02mm. In addition, the driver of the stepping motor has pulse
subdivision function
The motion is subdivided. If 8 subdivision is adopted, the linear
displacement of the electric translation platform can reach submicron level in
theory.
In this case, it is necessary to improve the motion speed of the electric
translation table
Usually such a form will appear. Drive for high speed servo motor, drive for
large pitch screw, or gear rack transmission. Toothed belt, etc. In this way
without sacrificing accuracy and stability
Under the premise of increasing the speed of the movement.
4. When combined with the electric translation platform, the tools installed
on it can reach any point in the three-dimensional space. The complex trajectory
can be realized by linear interpolation control.
Want to know more about electric translation platform information, welcome to
inquire
