PLANETARY TWO-SPEED GEARS PS

PLANETARY TWO-SPEED GEARS BY PS COMPANY STOBER

PS gearboxes are ideal for all machine tools requiring sophisticated main feed drive concepts: gantry machines, vertical and horizontal lathes or milling and drilling centers.
Two size groups PS25, PS30
Extremely energy efficient
With a double gear ratio of 4:1 (5.5:1) and 1:1, ideal for main spindle drives.
Quick gear changes between high speeds for fine machining and high torque for heavy machining.
The transmission temperature also remains constantly low, even with frequent gear changes or maximum engine load.
Two-speed gearbox with integrated gear changing actuator
Switching unit with SensorShift function
The position of the actuator is detected by SensorShift (electronic sensor).
Choice of standard or reduced rotational clearance
Maximum permissible gear temperature (on gear surface) ≤ 80 °C
Protection class IP65
Easy and safe motor adaptation thanks to the backlash-free clamping coupling

with circulating lubrication system
with splash lubrication in S version (angular contact ball bearing)
with splash lubrication in version R (deep groove ball bearing) or Z (cylindrical roller bearing)

SensorShift is an innovative, high-resolution magnetic sensor that precisely records the position of the selector teeth as they engage during gear changes, which momentarily reduces speed to ensure smooth engagement.
If for some reason the gear teeth do not engage smoothly, the SensorShift mechanism recognizes this and the shifting motor performs a short “reverse motion” to correct the problem. If the switching error level drops below 0.01%, the procedure is repeated, several times if necessary.
It is connected to the machine control system via a built-in connector.
The owner’s manual contains notes regarding the switching logic that must be programmed for shifting gears.
The position of the actuator is determined by an electronic sensor.
The actuator control system integrated in the switching unit analyzes the position signals and precisely actuates the switching motor.
Rated voltage 24 V DC −10%, +20%
Rated current when shifting gears 0.6 A
Starting current when changing gears 5 A
Maximum current of contacts S1 – S3 2 A (use a 2 A fuse (slow-blow) as fuse protection)
Expected service life S1 – S3 500,000 switching cycles (30 V DC, 1 A resistive load)
Low level digital inputs 0 – 8 V DC
High level digital inputs 12 – 30 V DC
Input current for digital inputs < 10 mA
Reflection time for digital inputs 100 ms
Shock resistance 20 g (10 Hz ≤ f ≤ 500 Hz)

There is no need for a customer-side relay or wiring in the control cabinet
Low complexity of programming the gear shifting process
The gear shifting process is not time sensitive for the machine control system and can run in the background
Automatic repetition of the shifting process in case of a shifting error
Wear-free, non-contact position detection
The integrated soft start system protects the mechanical parts
Possibility to shift to neutral from any gear
The SensorShift PCB version has compatible connections with the previous microswitch design.

442712_en_08_KAT_Zweigang-Schaltgetriebe_PS.pdf – Catalog of two-speed PS planetary gearboxes from Stober in English

442639_en_12_BAL_Zweigang-Schaltgetriebe_PS.pdf – User manual for Stober two-speed PS shift gears in English