TRINAMIC TMCM-1161 Modules for Stepper Motors User Manual

TRINAMIC TMCM-1161 Modules for Stepper Motors

TMCM-1161

1-Axis Stepper Controller / Driver up to 2.8 RMS / 24V DC USB, RS485, and RS232

UNIQUE FEATURES

TRINAMIC Motion Control GmbH & Co. KG Hamburg, Germany www.trinamic.com

Features

The TMCM-1161 is a single axis controller/driver module for 2-phase bipolar stepper motors with state of the art feature set. It is highly integrated, offers a convenient handling and can be used in many decentralized applications. The module can be mounted on the back of NEMA23 (57mm flange size) and NEMA24 (60mm flange size) stepper motors and has been designed for coil currents up to 2.8A RMS and 24V DC supply voltage. With its high energy efficiency from TRINAMIC’s coolStep™ technology cost for power consumption is kept down. The TMCL™ firmware allows for both, standalone operation and direct mode.

MAIN CHARACTERISTICS

Motion controller

• Motion profile calculation in real-time
• On the fly alteration of motor parameters (e.g. position, velocity, acceleration)
• High performance microcontroller for overall system control and serial communication protocol handling

Bipolar stepper motor driver

• Up to 256 micro steps per full step
• The high-efficient operation, low power dissipation
• Dynamic current control
• Integrated protection
• stallGuard2 feature for stall detection
• coolStep feature for reduced power consumption and heat dissipation

Encoder
sensOstep magnetic encoder (max. 1024 increments per rotation) e.g. for step- loss detection under all operating conditions and positioning supervision

Interfaces

• inputs for stop switches (left and right) and home switch
• 1 analog input
• 2 general purpose outputs (open collector with freewheeling diodes) ­
• USB, RS232, and RS485 communication interfaces

Software

TMCL:

• standalone operation or remote-controlled operation, program memory (nonvolatile) for up to 2048 TMCL commands, and PC-based application development software TMCL-IDE are available for free.

Electrical and mechanical data

• Supply voltage: +24V DC nominal (10… 30V DC)
• Motor current: up to 2.8A RMS (programmable)

Refer to separate TMCL Firmware Manual, too.

TRINAMICS UNIQUE FEATURES – EASY TO USE WITH TMCL

stallGuard2 is a high-precision sensorless load measurement using the back EMF on the coils. It can be used for stall detection as well as other uses at loads below those which stall the motor. The stallGuard2 measurement value changes linearly over a wide range of load, velocity, and current settings. At maximum motor load, the value goes to zero or near to zero. This is the most energy-efficient point of operation for the motor.

coolStep is a load-adaptive automatic current scaling based on the load measurement via stallGuard2 adapting the required current to the load. Energy consumption can be reduced by as much as 75%. coolStep allows substantial energy savings, especially for motors which see varying loads or operate at a high duty cycle. Because a stepper motor application needs to work with a torque reserve of 30% to 50%, even a constant-load application allows significant energy savings because coolStep automatically enables torque reserve when required. Reducing power consumption keeps the system cooler, increases motor life, and allows reducing cost.

Order Codes

electronics with

integrated sensOstep encoder and coolStep feature

| 60 x 60 x 12

Table 2.1 TMCM-1161 order codes

The following options are available:

Table 2.2 Firmware options

A cable loom set is available for this module:

–          1x cable loom for interface connector

–          1x cable loom for In/Out connector

–          1x cable loom for motor connector

–          1x USB type A connector to mini-USB type B connector cable

Table 2.3 Cable loom order code

Please note that the TMCM-1161 is available with NEMA23 and NEMA24 stepper motors, too. Please refer to the PD-1161 documents for more information about these products.

Mechanical and Electrical Interfacing

TMCM-1161 Dimensions and Mounting Holes
The dimensions of the controller/driver board are approx. 60mm x 60mm x 12mm in order to fit on the back of a 60mm stepper motor. Maximum component height (height above PCB level) without mating connectors is around 8mm above PCB level and 2.5mm below PCB level. There are four mounting holes for M3 screws for mounting the board either to a NEMA23 (two mounting holes at opposite corners) or a NEMA24 (other two mounting holes at opposite corners) stepper motor.

Connectors of TMCM-1161
The TMCM-1161 offers four connectors including the motor connector which is used for attaching the motor coils to the electronics. There are two connectors for serial communication (one for USB and one for RS232/RS485) and one connector for I/O signals and switches.

Interface /

Power

| JST B6B-EH-A, 2.5mm pitch connector

header, vertical

| JST EHR-6, female crimp connector housing; crimp

contacts JST SEH-001T-P0.6

Motor| JST B4B-EH-A, 2.5mm pitch connector

header, vertical

| JST EHR-4, female crimp connector housing; crimp

contacts JST SEH-001T-P0.6

In/Out| JST B8B-EH-A, 2.5mm pitch connector

header, vertical

| JST EHR-8, female crimp connector housing; crimp

contacts JST SEH-001T-P0.6

USB| Mini-USB type B vertical female| Mini-USB type B, male

Interface and Power Supply Connector

Power Supply
When using supply voltages near the upper limit, a regulated power supply is mandatory. The power supply should be designed in a way, that it supplies the nominal motor voltage at the desired maximum motor power. To ensure reliable operation of the unit, the power supply has to have a sufficient output capacitor and the supply cables should have a low resistance, so that the chopper operation does not lead to an increased power supply ripple directly at the unit. Power supply ripple due to the chopper operation should be kept at a maximum of a few 100mV.

HINTS FOR POWER SUPPLY CABLES

• ­ Keep power supply cables as short as possible.
• Use large diameters for power supply cables.

CAUTION!

**| Add external power supply capacitors!**

It is recommended to connect an electrolytic capacitor of significant size (2200µF or larger recommended) to the power supply lines next to the TMCM-1161 especially if the distance to the power supply is large (i.e. more than 2-3m)!

μF

Rule of thumb for size of electrolytic capacitor: c = 1000 × IMOT

A

In addition to power stabilization (buffer) and filtering this added capacitor will also reduce any voltage spikes which might otherwise occur from a combination of high inductance power supply wires and the ceramic capacitors. In addition it will limit slew-rate of power supply voltage at the module. The low ESR of ceramic-only filter capacitors may cause stability problems with some switching power supplies.

---|---
**| Do not connect or disconnect motor during operation!**

Motor cable and motor inductivity might lead to voltage spikes when the motor is disconnected / connected while energized. These voltage spikes might exceed voltage limits of the driver MOSFETs and might permanently damage them. Therefore, always disconnect power supply before connecting / disconnecting the motor.

**| Keep the power supply voltage below the upper limit of 30V!**

Otherwise the driver electronics will seriously be damaged! Especially, when the selected operating voltage is near the upper limit a regulated power supply is highly recommended. Please see also chapter 6 Fehler! Verweisquelle konnte nicht gefunden werden. (operating values).

**| There is no reverse polarity protection!**

The module will short any reversed supply voltage due to internal diodes of the driver transistors.

RS485
For remote control and communication with a host system the PD-1161 provides a two wire RS485 bus interface. For proper operation the following items should be taken into account when setting up an RS485 network:

BUS STRUCTURE:
The network topology should follow a bus structure as closely as possible. That is, the connection between each node and the bus itself should be as short as possible. Basically, it should be short compared to the length of the bus.

BUS TERMINATION:
Especially for longer busses and/or multiple nodes connected to the bus and/or high communication speeds, the bus should be properly terminated at both ends. The PD-1161 does not integrate any termination resistor. Therefore, 120 Ohm termination resistors at both ends of the bus have to be added externally.

NUMBER OF NODES:
The RS-485 electrical interface standard (EIA-485) allows up to 32 nodes to be connected to a single bus. The bus transceiver used on the PD-1161 units (SN65HVD3082ED) has just 1/8th of the standard bus load and allows a maximum of 256 units to be connected to a single RS485 bus.

NO FLOATING BUS LINES:
Avoid floating bus lines while neither the host/master nor one of the slaves along the bus line is transmitting data (all bus nodes switched to receive mode). Floating bus lines may lead to communication errors. In order to ensure valid signals on the bus it is recommended to use a resistor network connecting both bus lines as well defined logic levels. In contrast to the termination resistors this network is normally required just once per bus. Certain RS485 interface converters available for PCs already include these additional resistors (e.g. USB-2-485).

USB Connector

Table 3.3 In/Out connector

In/Out Connector

6

| ****

STOP_L/ STEP/ IN_1

| Digital input, +24V compatible, programmable internal pull-up.* Functionality can be selected in software:

a)       Left stop switch input (connected to REF1 input of TMC429 motion controller)

b)       Step signal (connected to step input of TMC262 stepper driver)

c)       General purpose input (connected to processor)

7

| ****

STOP_R/ DIR/ IN_2

| Digital input +24V compatible, programmable internal pull-up.* Functionality can be selected in software:

a)       Right stop switch input (connected to REF3 input of TMC429 motion controller)

b)       Direction signal (connected to direction input of TMC262 stepper driver)

c)       General purpose input (connected to processor)

8

| ****

HOME/ ENABLE/ IN_3

| Digital input +24V compatible, programmable internal pull-up.* Functionality can be chosen in software:

a)       Home switch input (connected to processor)

b)       Enable signal (connected to processor)

c)       General purpose input (connected to processor)

• It is possible to enable / disables pull-ups (1k to 5+V) in software for all three digital inputs. Pull-ups are always enabled/disabled for all three together / at the same time.

Left and Right Limit Switches
The TMCM-1161 can be configured so that a motor has a left and a right limit switch. The motor stops when the traveler has reached one of the limit switches. An additional home switch might be used for initialization .

Motor Connector

Reset to Factory Defaults

It is possible to reset the TMCM-1161 to factory default settings without establishing a communication link. This might be helpful in case communication parameters of the preferred interface have been set to unknown values or got accidentally lost. For this procedure two pads on the bottom side of the board have to be shortened (see figure 4.12). Please perform the following steps:

1. Power supply off and USB cable disconnected
2. Short two pads as marked in Figure 4.1
3. Power up board (power via USB is sufficient for this purpose)
4. Wait until the on-board red and green LEDs start flashing fast (this might take a while)
5. Power-off board (disconnect USB cable)
6. Remove short between pads
7. After switching on power-supply / connecting USB cable all permanent settings have been restored to factory defaults

On-board LEDs

The board offers two LEDs in order to indicate board status. The function of both LEDs is dependent on the firmware version. With standard TMCL firmware the green LED should be slowly flashing during operation and the red LED should be off. When there is no valid firmware programmed into the board or during firmware update the red and green LEDs are permanently on.

BEHAVIOR OF LEDS WITH STANDARD TMCL FIRMWARE

Operational Ratings

The operational ratings shown below should be used as design values. In no case should the maximum values been exceeded during operation.

regulated, adjustable via software)

| 0|  | 4| A
ICOIL_RMS| Continuous motor current ( RMS )| 0|  | 2.8| A
ISUPPLY| Power supply current|  | << ICOIL| 1.4 * ICOIL| A
TENV| Environment temperature at rated current (no forced

cooling required)

| -35*)|  | +50| °C

Table 6.1 General operational ratings of the module

• limited by test equipment. Includes power-up / cold start at this temperature. It can be expected that the module will work down to -40°C.
  Symbol| Parameter| Min| Typ| Max| Unit
  ---|---|---|---|---|---
  VSTOP_L/R_HOME| Input voltage for stop / home switch inputs STOP_L / STOP_R and HOME

(also valid when configured for alternate function)

| 0|  | 28| V
VSTOP_L/R_HOME_L| Low level voltage for stop / home switch inputs STOP_L / STOP_R and HOME

(also valid when configured for alternate function)

| 0|  | 1.1| V
VSTOP_L/R_HOME_H| High level voltage for stop / home switch inputs STOP_L / STOP_R and HOME

(also valid when configured for alternate function)

| 2.9|  | 28| V
VOUT_0/1| Voltage at open collector output OUT_0 / OUT_1| 0|  | VCC| V
IOUT_0/1| Output sink current for OUT_0 / OUT_1|  |  | 100| mA
VIN_0| Full scale input voltage range for analog input IN_0| 0|  | 10| V

Table 6.2 Operational ratings of general purpose I/Os

Table 6.4 Operational ratings of the RS485 interface

Functional Description

The TMCM-1161 is a highly integrated controller/driver module which can be controlled via several serial interfaces. Communication traffic is kept low since all time critical operations (e.g. ramp calculations) are performed on board. The nominal supply voltage of the unit is 24V DC. The module is designed for both, standalone operation and direct mode. Full remote control of device with feedback is possible. The firmware of the module can be updated via any of the serial interfaces.

In Figure 7.1 the main parts of the TMCM-1161 are shown.

• the microprocessor, which runs the TMCL operating system (connected to TMCL memory),
• the motion controller, which calculates ramps and speed profiles internally by hardware,
• the power driver with its energy efficient coolStep feature,
• the MOSFET driver stage, and
• the sensOstep encoder with resolutions of 10bit (1024 steps) per revolution.

The PC based software development environment TMCL-IDE for the Trinamic Motion Control Language (TMCM) can be downloaded free of charge from the TRINAMIC website (www.trinamic.com). Using predefined TMCL high level commands like move to position a rapid and fast development of motion control applications is guaranteed. Please refer to the TMCM-1161 Firmware Manual for more information about TMCL commands.

TMCM-1161 Operational Description

Calculation: Velocity and Acceleration vs. Microstep and Fullstep Frequency
The values of the parameters sent to the TMC429 do not have typical motor values like rotations per second as velocity. But these values can be calculated from the TMC429 parameters as shown in this section.

PARAMETERS OF TMC429

pulse_div

| divider for the velocity. The higher the value is, the less is the maximum velocity

default value = 0

|

0… 13

ramp_div

| divider for the acceleration. The higher the value is, the less is the maximum acceleration

default value = 0

|

0… 13

Usrs| microstep-resolution (microsteps per fullstep = 2usrs)| 0… 8

The microstep-frequency of the stepper motor is calculated with

To calculate the fullstep-frequency from the microstep-frequency, the microstep-frequency must be divided by the number of micro steps per fullstep.

The change in the pulse rate per time unit (pulse frequency change per second – the acceleration a) is given by

This results in acceleration in fullsteps of:

Example:

Calculation of the number of rotations: A stepper motor has e.g. 72 fullsteps per rotation.

Life Support Policy

TRINAMIC Motion Control GmbH & Co. KG does not authorize or warrant any of its products for use in life support systems, without the specific written consent of TRINAMIC Motion Control GmbH & Co. KG. Life support systems are equipment intended to support or sustain life, and whose failure to perform, when properly used in accordance with instructions provided, can be reasonably expected to result in personal injury or death.

TRINAMIC Motion Control GmbH & Co. KG 2013 Information given in this data sheet is believed to be accurate and reliable. However neither responsibility is assumed for the consequences of its use nor for any infringement of patents or other rights of third parties, which may result from its use. Specifications are subject to change without notice. All trademarks used are property of their respective owners. Downloaded from

Revision History

Document Revision

Version| Date| Author

GE – Göran Eggers SD – Sonja Dwersteg

| Description
---|---|---|---
1.00| 2011-JUN-30| SD| Initial version
1.10| 2011-AUG-22| GE| Updates for hardware version TMCM-1161_V10

1.11

| ****

2012-MAR-09

| ****

SD

| •                    Chapter 5 added

•                    Chapter 4 added

•                    Design updated

1.12| 2012-JUL-30| SD| Description of analog and digital inputs corrected
1.13| 2013-MAR-27| SD| AIN_0 renamed: IN_O
1.14| 2013-JUL-05| SD| Chapter 3.2.1.1 (power supply) updated

Table 10.1 Document revision

Hardware Revision

TMCM-1161_V10

| ****

2011-JUL-22

| Redesign:

–           Corrected and modified clock concept

–           Stop switches connected to REF1+3 of TMC429

–           New encoder IC with 10bit resolution (max.)

Table 10.2 Hardware revision

References

• [TMCM-1161] TMCM-1161 TMCL Firmware Manual
• [TMCL-IDE] TMCL-IDE User Manual
• [QSH5718] QSH5718 Manual
• [QSH6018] QSH6018 Manual

Please refer to www.trinamic.com.

• www.trinamic.com

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