The X-Y and Z-axis X-Y positioning system is the main indicator for evaluating the accuracy of the placement machine, which includes the drive mechanism and servo system. The increase in placement speed means that the X-Y transmission mechanism generates heat due to its increased operating speed, and the ball screw is the main source of heat, the variation of which affects placement accuracy. The newly developed X-Y transfer system has a cooling system in the guide rails. High speed machines run faster with frictionless linear motors and air bearing guideways. The smaller mounters are driven by timing belt linear bearings. The system operates with low noise and in a good working environment. the X-Y servo system (positioning control system) is driven by AC servo motors to achieve precise positioning at the command of the sensor and control system, so the accuracy of the sensor plays a key role. Displacement sensors include angle encoders, magnetic scales and optical scales.
1. Garden encoders
The encoder is equipped with two garden gratings on different parts of the rotation, the garden gratings are made of glass or transparent and plastic materials, and are coated with bright and dark radiating chrome lines, the distance between adjacent bright and dark is generally called a grid section, the total number of grid sections throughout the garden is the number of line pulses of the encoder. The number of chrome lines also indicates the level of data accuracy. One piece of the encoder is not fixed in the central part of the rotation for the indicator analysis encoder, another piece is with the rotation axis with the same stair movement and used to achieve the count, so the indicator encoder and the rotation encoder structure composition has a pair of electronic scanning technology system, equivalent to our count temperature sensor. The garden encoder is installed in the servo drive motor, it can measure the position, angle and angular acceleration of the rotating parts, it can convert these basic physical quantities into electrical signals opinion to the control management system.
2. Magnetic scale
It consists of a magnetic scale and a magnetic head detection circuit, which uses electromagnetic properties and the magnetic recording principle to measure displacement. On the basis of the non-magnetic scale, a magnetic film (10-20μm) is deposited on the non-magnetic scale by chemical plating or electroplating and recorded on the magnetic film, with a certain wavelength of square wave or sine magnetic channel signal of a certain year on the meter. The magnetic head moves and reads the magnet on the magnetic scale, converting the electrical signal into a control circuit that eventually controls the operation of the AC servo motor. The utility model is simple to make, easy to install, high stability, large measurement range, measurement accuracy of up to 1-5μm, chip accuracy is generally 0.02 mm.
3. Grating scale
By the scale, scale reading head and detection circuit composition.
Features of NeoDen K1830 Pick and Place Machine
1. 8 Synchronized Nozzles which ensure a repeatable placement accuracy with high speed.
2. Machine runs on highly stable and secure Linux operating system.
3. Double mark cameras to reach at extreme end feeders for better calibration.
4. High resolution and high speed component camera system improves the overall speed of the machine.
5. Picking location of pneumatic feeder can be calibrated automatically and promptly, to ensure easy operation and high efficiency.
Post time: Jun-25-2023