Product Description
The KM39 multi-turn absolute encoder (blind hole shaft) is
a miniaturized design of blind hole shafts, featuring a robust and durable product structure
Product Features
1.1 Introduction: |
|
Product parameters
Project | Basic parameters |
Encoder type | Absolute value encoder |
External dimensions | Outer diameter: 39mm |
Thickness: 41mm | |
Shaft diameter: 6mm/8mm/10mm | |
Resolution (Single circle) | 17bit，19bit，20bit，22bit，24bit |
Resolution (multiple turns) | 17+16bit，19+16bit，20+16bit，22+16bit，24+16bit |
Communication format | BISS C&SSI |
Power supply voltage | 5V |
Mechanical connection | It is clamped and locked with the shaft and fixedly connected to the flexible spring plate |
Qualification method | Cable connection |
Ambient temperature | Operating temperature: -40 to +95° C |
Storage temperature: -40 to +95° C | |
Environmental humidity | Operation and storage: 35-85%RH (no condensation) |
Accuracy | ±180″ |
Starting torque | Less than 9.8 × 10-3 n.m |
Inertial moment | Less than 6.5 × 10-6kg.m2 |
Allowable force of the shaft | Radial 30N Axial 20N |
Electrical interface | RS-485 |
Shell | Aluminum alloy |
Protection grade | IP65 |
Maximum allowable rotational speed | ≤6000 rpm |
Packaging method | Paper box |
Weight | 130g |
Instructions for Use
1、Selection Guide | ||||||||||||||||
Model composition (Selection parameters) | ||||||||||||||||
KM39- | S | 10 | B | 2416 | R | D | － | 000 | ||||||||
↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ||||||||
Series product models | Connection interface: | Shaft diameter: (Solid shaft) | Communication format: | Resolution single circle | Electrical interface | Power supply voltage: | Special Specifications: | Management Number | ||||||||
Special Specifications: ①.IP=50; The length of the cable is 1 meter. If the length needs to be changed to C+ numbers, the maximum length will be 100 meters (denoted as C100). | ||||||||||||||||
2、Resolution
Single lap (ST） | Multi-circle (MT） | ||
17Bits 2¹⁷(0~+131071) | 16Bits 2¹⁶(65536 turns) | ||
19Bits 219(0~+524287) | 16Bits 2¹⁶(65536 turns) | ||
20Bits 220(0~+1048575) | The standard product is below 24Bits and can be expanded up to 32Bits at most | 16Bits 2¹⁶(65536 turns) | 16Bits are standard products, and the rest are custom-made products with a maximum of 24Bits |
22Bits 222(0~+4194303) | 16Bits 2¹⁶(65536 turns) | ||
24Bits 224(0~+16777215) | 16Bits 2¹⁶(65536 turns) | ||
3、Specification parameters
Name | Parameters | Remarks |
Scanning principle | Optoelectronics | |
Accuracy | ± 80" | |
Response rotation speed | During normal action: 6000min⁻¹ | |
RMS position signal noise | ±2 @18 Bits/r | |
Communication format | BiSS_c(binary) | Refer to the BiSS_c standard |
SSI(Binary/Gray Code) | Refer to the SSI standard | |
Communication clock frequency | ≤10 MHz(BiSS) or ≤5 MHz(SSI) | |
Resolution | 24 Bits can be expanded up to 32 Bits at most | Frame information is detailed in (data frame). |
Startup time | Typical value: 13 ms | |
Absolute position sampling period | ≤75 ns | |
Permissible rotational speed | ≤32200 r/min | Restricted by the mechanical speed limit |
Electrical connection | Cable connection | |
Cable | Twisted pair cable | |
Cable length | 200mm -10000mm | |
Internal single-loop position update rate | 15000kHz | The access rate is limited by the communication frequency |
Internal multi-circle position update rate | 11.5kHz | |
Temperature alarm limit value | -40℃~95℃ |
4、Mechanical specifications
Name | Parameters | Remarks |
Mechanical connection | It is clamped and locked with the shaft and fixedly connected to the flexible spring plate | |
Axial aperture | φ6mm, φ8mm, φ10mm(not through the shaft, depth 20mm) | |
Shaft material | Stainless steel | |
Starting torque | Below 9.8×10-3N · m | |
Inertial moment | Less than 6.5×10-6kg · m² | |
Allowable force of the shaft | Radial 30N Axial 20N | |
Maximum allowable rotational speed | ≤6000 rpm | |
Shell material | Aluminum alloy | |
weight | About 130g |
5、Environmental parameters
Name | Parameters |
Ambient temperature | Operating temperature: -40 to +95℃ |
Storage temperature: -40 to +95℃ | |
Environmental humidity | During operation and storage: 35-85%RH(no condensation) |
Vibration | Amplitude: 1.52mm,5-55 Hz, 2 hours in each of the three axes |
Impact | 980m/s² for 11ms, three times in the X,Y, and Z directions |
Protection grade | IP65 |
6、Electrical characteristics: Absolute maximum rated parameter range
Symbol | Explanation | The smallest | The largest | Unit |
Vcc | Working voltage | -0.3 | 6 | V |
VBAT | Backup voltage | -0.3 | 6 | V |
TsTG | Storage temperature | -40 | 95 | ℃ |
TJ | Node temperature | -50 | 125 | ℃ |
7、Electrical parameters
Symbol | Explanation | The smallest | Typical value | The largest | Unit |
Vcc | The supply voltage is DC5V | 4.75 | 5 | 5.5 | V |
The power supply voltage is DC8-30V | 7.75 | 30 | 32 | V | |
loo | Working current | 一 | 一 | 120 | mA |
UpBat | Backup voltage ① | 3 | 3.6 | 4.2 | V |
'(BAT) | Backup current | 一 | 一 | 35 | uA |
BISS communication clock frequency | - | - | 10 | MHz | |
fsiss ② | SSI communication clock frequency | - | - | 5 | MHz |
Ta | Working environment temperature | -40 | - | 95 | ℃ |
①For the power supply sequence of multi-turn encoders, please make sure that the battery is powered on first and then the system power is connected. ② For details, please refer to the BiSS_C and SSI standards. | |||||
8、Basic dimensions and installation shaft specifications
9、Interface definition and functional definition of line color
Unit: mm
Line color | Signal name | Twisted pair cable | ||||
BISS_C single lap | BISS_C Multiple laps | SSI single lap | SSI Multiple laps | Function | ||
red | Up | Up | Up | Up | The power supply is positive. |
|
black | Un | Un | Un | Un | Negative power supply | |
white | SL- | SL- | DATA- | DATA- | Data signal |
|
White/Black | SL+ | SL+ | DATA+ | DATA+ | Data signal | |
green | MA- | MA- | CLOCK- | CLOCK- | Clock signal |
|
Green/Black | MA+ | MA+ | CLOCK+ | CLOCK+ | Clock signal | |
yellow | N.C. | Vbat | N.C. | Vbat | Backup power supply |
|
Yellow/Black | N.C. | 0V | N.C. | 0V | 0V | |
①The cable length of 1M is the factory standard of our company. The maximum length can be increased to 10M. | ||||||
10、Electrical connection
One-point-to-point wiring method
Note: Both the MA and SLO lines are differential twisted-pair transmission cables, compatible with RS422. The termination resistor of the MA transmission line has been integrated inside the encoder.
11、BiSS_C communication
Figure 2 BiSS_C timing diagram
Figure 3 BiSS_c(SSI) slave timeout timing series
Figure 4 BiSS data frame structure
12、SSI Communication
Figure 5 SSI timing diagram
Figure 6 SSI data frame structure
The data frame is composed of the frame structure and the data to be transmitted. The data transmission sequence is to output the MSB as the priority, the error bit and alarm bit as the low valid, and the check bit as the flipped level output. The specific data composition is shown in the following table:
Bits No. | Data segment | Explanation |
[55:32] | MT[23:0] | Record the cumulative number of turns that the encoder has run after being powered on |
[31:8] | ST[23:0] | The current absolute position data |
[7] | nERR | Incorrect bit, low valid |
[6] | nWARN | Alarm position, low effective |
[5:0] | CRC[5:0] | The CRC polynomial of the check bit is 0×43, with an initial value of 0(output at the flip level). |
Product Display
KM39 absolute encoder
High speed, high pulse, high precision, resistance to high and low temperatures, and high stability
Unique patented mechanical structure
Compact structure and ultra-thin design; The patented concentric locking structure of the shaft
Self-designed grating code disk
And assembly process
The circuit adopts anti-interference measures
Application Cases
It is widely applied in the field of industrial automation, such as position control of machine tools and robots. In the power industry, it is used for monitoring the rotational speed and position of generators and steam turbines; It can also be used in elevators, textile machinery, etc., to achieve precise positioning and speed regulation, and improve the performance and degree of automation of the equipment.
Service
1. Precautions for Using Encoders
A place where the ambient temperature must not exceed the storage temperature; A place where the relative humidity must not exceed the storage
humidity; It cannot be in places with sharp temperature changes and fogging. Places close to corrosive gases and flammable gases; Stay away from
places with a lot of dust, salt and metal powder. Stay away from places where water, oil and medicine are used; Excessive vibration and shock can be
transmitted to the main body
2. Precautions for Installing Encoders
Electrical components must not be subjected to overvoltage or other phenomena. Please conduct static electricity assessment of the setting
environment, etc. Do not allow the motor power line to approach the encoder. The FG wire of the motor and the FG wire of the mechanical device
must be reliably grounded. Since the shielded wire is not connected to the encoder body, the shielded wire must be effectively connected to the
ground at the user end
3. Precautions on Wiring
When used at the specified power supply voltage, please pay attention to the decrease in power supply voltage amplitude caused by the long wiring.
Please do not use the encoder line and other power lines in the same pipe or bundle them in parallel. Please use twisted-pair wires for the signal line
and power line of the encoder. Please do not apply excessive force to the wire harness of the encoder, as there is a risk of wire breakage
4. Regarding the warranty of the encoder
Within twelve months of purchasing the products of our company, if any malfunction occurs due to correct use in accordance with the precautions
in the user manual, warning signs, etc., free warranty will be provided.
The following situations will be charged even within the warranty period: (Freight is at your own expense)
①. Faults and damages caused by the user landing during transportation or handling or improper installation;
②. Faults of this product caused by the machine connected to it;
③. Faults and damages caused by fire, salt water, corrosive gases, abnormal voltages, and other natural disasters such as earthquakes, lightning, wind, and floods;
④. Repair, adjustment or modification without the permission of our company (the label is not present or the outer cover is removed by oneself).
⑤. Malfunctions that occur when the user does not follow the usage methods and precautions described in the user manual.
⑥. Except where there are other agreements signed with the client.
