Introduction 

Is there a product that can cover almost all applications in the servo spindle industry?

The answer is yes, and that is the SPS series of Magmite servo spindle drives.

The technical team of Megmeet Drive Company has been deeply involved in the machine tool industry for many years, and is well versed in the spindle control technology and spindle characteristics of various machine tools. With the accumulation of technology, whether it is a traditional lathe, high-speed high-gloss machine, high-speed drilling and tapping machine, turning and milling compound, machining center, core walking machine, machine tool fourth and fifth axis, SPS series related products have corresponding solutions ; From mechanical spindle, electric spindle, linear motor, to DDR motor, from traditional square wave incremental PG to rotary wave incremental PG to high-level single / multi-turn communication PG, from pulse command to CanOpen, EtherCAT bus command, SPS series Product drive control technology has continuously made breakthroughs and continuously extended in the field of servo spindles and related subdivisions

SPS series product introduction

1、Brief introduction of SPS series products

•  SPS-4Txx: Single closed-loop square wave photoelectric incremental PG type

•  SPS-ABS-4Txx：Single closed loop absolute value PG type

•  SPS-SIN-4Txx：Single closed loop sine and cosine PG type

•  SPS-RLV-4Txx：Single closed-loop resolver PG type

•  SPS-4Txx-DCL：Double closed loop absolute value + rotary wave increment PG type

•  SPS-4Txx-DCL02：Double closed-loop double photoelectric incremental PG type

•  SPS-4Txx-N：bus type

2、Features of SPS series products

•  Optimized motor control algorithm, compatible with asynchronous / synchronous axis, high dynamic response, fast acceleration and deceleration without tripping

•  Large margin hardware design, up to 2.5 times overload

•  Support all kinds of encoders, such as ABZ / ABZ-UVW, SINCOS, resolver, Tamagawa absolute value, HEIDENHAIN absolute value, SICK absolute value, Renishaw etc.

•  Up to 16-bit AI expansion input to ensure speed following accuracy

•  Maximum support 4MHz pulse frequency input, combined with vortex subdivision to ensure the accuracy of indexing control

•  Support CanOpen, EtherCAT bus control, faster, more accurate, and more concise wiring

SPS series product application

1、Mechanical spindle

With a large number of lathes, the current configuration is mainly the asynchronous servo motor + belt + mechanical spindle solution, and very few are synchronous electric spindles (high cost). There are three schemes as follows:

   1.1 Single closed loop or semi closed loop scheme

     In this solution, the servo spindle motor is equipped with an encoder. The spindle can be installed without an encoder. The drive is closed-loop controlled. The frequency division signal is fed back to the system. With a synchronous belt, the spindle can be indexed

1 .2 Full closed loop or double closed loop scheme

   This program is to control the spindle index more accurately, overcome the deviation caused by the intermediate transmission link, and improve the performance of the equipment

  1.3 False closed loop

  The scheme refers to the original ordinary CNC lathe with ordinary frequency conversion control, the motor does not have an encoder, but the spindle has an encoder. On this basis, the transformation and upgrade is to replace the original frequency converter with SPS and take the spindle encoder signal feedback For the drive, the spindle control has more C-axis functions and supports external zero return or system pulse zero return.

2、 Electric spindle

The electric spindle is widely used in high-speed and high-precision machining, with asynchronous and synchronous shafts, and has certain requirements for speed and torque stability, acceleration and deceleration response, positioning accuracy, positioning strength, etc. The control requirements are mostly closed loop, and the addition of a sine and cosine encoder is conducive to the control of positioning accuracy and positioning force.

3、 Asynchronous servo spindle

It mainly refers to that the load and the motor are directly connected mechanically, without intermediate links, and is mainly used for processing centers, drilling and tapping machines and other equipment.

4、 DDR motor

More functions, higher efficiency, higher precision, and higher time utilization are increasingly appealing to the manufacturing industry. In order to reduce the number of artificial clampings during workpiece processing to improve efficiency, save time, and ensure accuracy, A or B axes (fourth and fifth axes) are compounded on the basis of existing X, Y, and Z axes to meet higher requirements Processing needs.

At present, DDR motors are mostly used in the fourth and fifth axes, which are characterized by low speed, high torque and high multi-point positioning accuracy.

Configuration case: touch screen + PLC (MC200E) + 220V_7R6-SPS driver + Shengchang direct drive motor (BISS_C 26-bit absolute encoder)