Stepper drive
Trinamic (Analog Devices) TMCM-1211 (StepRocker) stepper drive
Single-axis stepper controller/driver board built on the TMC5160: 10–30 V, up to 5.7 A RMS, 256 microsteps, StealthChop, StallGuard and CoolStep, with USB, RS485 and step/direction.
Key specifications
| Voltage (max) | 30 V |
|---|---|
| Data / bus | USB, RS485, step/direction |
| Supply | 10–30 VDC |
| Axes | 1 |
| Current (max) | 5.7 A |
| Microsteps | 256 |
| Features | SixPoint ramp controller, StallGuard, CoolStep, StealthChop; TMCL firmware |
Summarised in our own words from Analog Devices, Inc.'s published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Notes on this data
Status 'Production' on the ADI page.
Specify Motion is not affiliated with Analog Devices, Inc.. Trinamic (Analog Devices) and TMCM-1211 (StepRocker) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
Alternatives that meet or exceed these figures
Engineers often come to us with a Trinamic (Analog Devices) part number and leave with an alternative that is easier to source, quicker to deliver or a better fit for the machine. These 3 series from our supply network are the closest match on published figures.
Digital open-loop pulse/direction stepper drives from 1.5 A to 8.2 A with auto-tuning, anti-resonance and soft start.
| Published maximum | TMCM-1211 (StepRocker) | Leadshine EM-S Series (EM415S-EM882S, … |
|---|---|---|
| Continuous current | 5.7 A | 8.2 A meets or exceeds |
| Axes | 1 | — |
Basic pulse-controlled open-loop stepper drives from 2.2 A to 8.2 A including an AC-input model.
| Published maximum | TMCM-1211 (StepRocker) | Leadshine EM1 Series |
|---|---|---|
| Continuous current | 5.7 A | 8.2 A meets or exceeds |
| Axes | 1 | — |
Legacy digital pulse drives from small 30 VDC units up to 240 VAC mains-input drives for NEMA 34-52 motors.
| Published maximum | TMCM-1211 (StepRocker) | Leadshine DM-E / DMA / DM high-voltage… |
|---|---|---|
| Continuous current | 5.7 A | 8.2 A meets or exceeds |
| Axes | 1 | — |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
What a stepper drive is
An open-loop stepper drive powers a stepper motor by switching current through its windings in sequence, usually using a chopper that regulates phase current to a set level. It receives step and direction pulses from a controller, and each pulse moves the motor by one step or microstep. Settings for current, microstepping and idle current are made by switches or software. Without position feedback, the drive assumes the motor follows each step.
When engineers choose a stepper drive
Choose an open-loop stepper drive for simple, low-cost positioning where loads are predictable and missed steps are unlikely, such as indexers, small axes and instruments. It is easy to set up with no tuning. The trade-offs are no stall detection, heat from constant current and resonance at some speeds. Where loads vary or a lost position would cause a fault, a closed-loop stepper drive or servo is safer.
How to specify the Trinamic (Analog Devices) TMCM-1211 (StepRocker)
Send these with your enquiry and an engineer can confirm the right TMCM-1211 (StepRocker) variant or an equivalent:
- Supply voltage (V DC or AC)
- Phase current range (A)
- Motor type: two-phase or three-phase
- Microstep settings
- Pulse input frequency and signal levels
- Idle current reduction
- Mounting and cooling
Common mistakes to avoid
- Supply voltage too low for the speed required
- Setting current above the motor rating
- Ignoring mid-speed resonance
- Mismatching pulse signal levels with the controller
Trinamic (Analog Devices) TMCM-1211 (StepRocker): frequently asked questions
What is the Trinamic (Analog Devices) TMCM-1211 (StepRocker)?
Single-axis stepper controller/driver board built on the TMC5160: 10–30 V, up to 5.7 A RMS, 256 microsteps, StealthChop, StallGuard and CoolStep, with USB, RS485 and step/direction. Published series figures include voltage 30 V, axes 1, current 5.7 A. It is made by Analog Devices, Inc.; Specify Motion can help source it or propose an equivalent.
Who makes the Trinamic (Analog Devices) TMCM-1211 (StepRocker)?
The Trinamic (Analog Devices) TMCM-1211 (StepRocker) is made by Trinamic (Analog Devices) (Analog Devices, Inc.) and is listed here for engineers comparing options. Specify Motion is not affiliated with Analog Devices, Inc.; brand names are used only to identify the product.
What is the voltage of the Trinamic (Analog Devices) TMCM-1211 (StepRocker)?
The published series maximum voltage is 30 V. Individual models and sizes in the TMCM-1211 (StepRocker) range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Trinamic (Analog Devices) TMCM-1211 (StepRocker)?
Yes. On published figures, Leadshine EM-S Series (EM415S-EM882S, EM532-MINI) and Leadshine EM1 Series are the closest match from our supply network. An engineer confirms the fit against your application before recommending anything.
How does supply voltage affect stepper performance?
Higher supply voltage lets current rise faster in the motor windings, so torque is maintained to higher speeds. A common rule of thumb is to keep the supply within the motor and drive limits, often several times the motor's rated voltage. Check the drive's maximum voltage and the motor's insulation rating.
What is idle current reduction?
Idle current reduction lowers motor current automatically when the motor is stationary, reducing heat while still holding position with reduced torque. It is useful for steppers that spend time at standstill. Check that the reduced holding torque is enough for the load.
Further reading: How to select a stepper drive · How to select a stepper motor · Servo drives
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