MDrive AccuStep 34ac
- NEMA 34 1.8° brushless step motor
- microstepping driver
- 120 or 240 VAC integrated power supply
- fully programmable motion controller
- rugged magnetic encoder with index mark,
internal to the unit - AccuStep control technology's numerous benefits
- RS-422/485 communication with CANopen option
- IP65 rating
- 3 motor length choices
- optional control knob or planetary gearbox
Programming for point-to-point positioning, torque mode, energy-saving variable current and more, is accomplished with the feature rich MCode software and easy-to-use terminal emulator programs provided.
- Specifications
- Benefits & Applications
- Options
- Part Numbers
- Downloads/Support
- General & I/O
- Motion
- Software
- Motor
- Mechanical
| Input voltage (+V) |
Range | 120 Volt version – 95 to 132 VAC @ 50/60 Hz 240 Volt version – 95 to 264 VAC @ 50/60 Hz |
|
| Communication | Type | RS-422/485 | |
| Baud rate | 4.8 to 115.2 kbps | ||
| Thermal | Operating temperature | Heat sink | -40° to 75°C (non-condensing) |
| Motor | -40° to 90°C (non-condensing) | ||
| Protection | Type | Thermal, internal fuse | Designed for line-neutral systems |
| Aux. logic input voltage | Range | +12 to +24 VDC Maintains power to control and feedback circuits (only) when input voltage is removed. |
|
| Analog input | Resolution | 10 Bit | |
| Range (selectable) |
0 to +5 VDC, 0 to +10 VDC, 0 to 20 mA, 4 to 20 mA | ||
| General purpose I/O | Number/type | 8 sourcing or sinking outputs/inputs | |
| Logic range | +5 to +24VDC inputs and sinking outputs; inputs TTL level compatible +12 to +24VDC sourcing outputs |
||
| Output sink/source current | Up to 600 mA per channel | ||
| Protection | Over Temp, Short Circuit, Transient Over Voltage, Over Voltage, Inductive Clamp | ||
| Closed loop configuration with encoder | Encoder type | Internal, magnetic | |
| Steps per revolution | 51200 | ||
| Resolution | 1000 lines / 4000 edges per rev | ||
| Counters | Type | Position, encoder | |
| Resolution | 32 bit | ||
| Edge rate (maximum) | 5 MHz | ||
| Velocity | Range | +/- 5,000,000 steps per second | |
| Resolution | 0.5961 steps per second | ||
| Accel/Decel | Range | 1.5 x 109 steps per second2 | |
| Resolution | 90.9 steps per second2 | ||
| High speed I/O | Position capture | Input filter range | 50 nS to 12.9 µS (10 MHz to 38.8 kHz) |
| Resolution | 32 bit | ||
| Trip – output speed / resolution / threshold | 150 nS / 32 bit / TTL | ||
| Program storage | Type / size | Flash / 6384 bytes |
| User registers | (4) 32 bit | |
| User program labels and variables | 192 | |
| Math functions | +, –, x, ÷, >, <, =, <=, >=, AND, OR, XOR, NOT | |
| Branch functions | Branch & call | |
| General purpose I/O functions | Inputs | Home, Limit Plus, Limit Minus, Go, Stop, Pause, Jog Plus, Jog Minus, General Purpose |
| Outputs | Moving, Fault, Stall, Velocity Change, General Purpose |
|
| Trip functions | Trip on Input, Trip on Position, Trip on Time, Trip Capture, Trip on Relative Position |
|
| Party mode addresses | 62 | |
| Encoder functions | Stall Detection, Position Maintenance, Find Index | |
| Single length | Double length | Triple length | |
| Holding torque oz-in / N-cm |
330 / 233 | 500 / 353 | 750 / 529 |
| Detent torque oz-in / N-cm |
10.9 / 7.7 | 14.16 / 10.0 | 19.83 / 14.0 |
| Rotor inertia oz-in-sec2 / kg-cm2 |
0.0142 / 1.0 | 0.0227 / 1.6 | 0.0482 / 3.4 |
| Weight (motor+driver) lb / kg |
6.4 / 2.9 | 7.7 / 3.5 | 11.0 / 5.0 |
| Torque/Speed Curve |
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120VAC motor
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240VAC motor
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Benefits
- No tuning required
- Higher inertia mismatch allowed
- High starting torque
- Smooth motion, even at extremely slow speeds
- Eliminates loss of synchronization
- Allows full use of motor’s torque
- Reduced motor heating
- Minimizes impact of system resonance
- Able to regulate torque, even at a standstill
- Variable operating current, only uses the power that is required
Applications
- Point-to-point positioning
– Reduce motor frame size requirement - Conveyor control
– No loss of synchronization
– Adapts to sudden load changes - Hydraulic and pneumatics replacement
– Low cost
– Accurate and variable positioning - Web handling
– Tension control - Drilling
– Variable torque - Rotary and linear positioning to torque specification
– Container capping
– Clamping / holding
– Screw tightening - On-the-fly product marking (labeling)
– High acceleration and deceleration rates
- QuickStart Kit
- Gearboxes
- Control Knob
- Connectivity Solutions
 Above photo represents a QuickStart Kit.
Kit cabling varies with MDrive ordered. |
All-inclusive QuickStart Kits facilitate rapid design verification by bundling MDrive products with everything needed to connect quickly and conveniently, enabling engineers to confirm with confidence that their application’s design goals are met. QuickStart Kits include: a single sheet instruction guide, software/manuals CD, and connection cabling including Communications Converter and Prototype Development Cable(s). Order QuickStart Kits simply by placing a “K” at the beginning of an MDrive part number. Connecting an MDrive has never been easier with readily available Communications Converters and Prototype Development Cables, in addition to Mating Connector Kits for use in building your own cables. Select the “Connectivity solutions” tab above for details on these connectivity options. |
Planetary gearbox
The MDrive AccuStep 34ac is available with a Planetary Gearbox option developed to increase torque at lower speeds, enable better inertia matching and produce finer positional resolutions. These efficient, low maintenance Planetary Gearbox come fully assembled with the MDrive and are offered in a large number of reduction ratios in 1-, 2- and 3-stage configurations.
| Permitted output torque (oz-in / Nm) |
Gearbox efficiency |
Maximum backlash |
Maximum load (lb-force / N) Output side with ball bearing |
Weight (oz / g) | |||
| Radial | Axial | Gearbox | with Flange | ||||
| 1-stage | 2832 / 20.0 | 0.80 | 1.0° | 90 / 400 | 18/80 | 64.4 / 1827 | 66.7 / 1890 |
| 2-stage | 8496 / 60.0 | 0.75 | 1.5° | 135 / 600 | 27/120 | 89.5 / 2538 | 92.6 / 2625 |
| 3-stage | 16992 / 120.0 | 0.70 | 2.0° | 225 / 1000 | 45/200 | 114.6 / 3248 | 118.5 / 3360 |
See NEMA 34 Planetary Gearbox for ratios and mechanical specifications.
MDrive AccuStep is available with a factory-mounted rear control knob for manual shaft positioning.
Knob shown from rear
Dimensions in Inches (mm)
Communication Converter
Electrically Isolated, in-line converter pre-wired with mating connector to conveniently set/program parameters for a single MDrive AccuStep via a PC's USB port. Length 12.0' (3.6m).
| Converter Part Number | Mating Connector Type |
| MD-CC401-001 (USB to RS-422/485) | 5-pin M12 circular connector |
Prototype Development Cables
Prototype development cables are designed to speed test/development with pre-wired mating connectors that have flying leads other end. Single-ended cordsets are PVC jacketed with foil shield and unconnected drain wire. Length 13.0' (4.0m).
| Prototype Development Cable P/N | Mating Connector Type | Signal Type |
| MD-CS100-000 (straight termination) MD-CS101-000 (right angle termination) |
19-pin M23 circular connector | I/O |
| MD-CS200-000 (straight termination) MD-CS201-000 (right angle termination) |
3-pin Euro AC circular connector | Power |
Literature
Software
Additional Resources