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Features
- High performance, low cost
- Supply voltage up to +90VDC
- M880 output current up to 7.8A
- M840 output current up to 3.9A
- Inaudible 20khz chopping frequency
- TTL compatible and optically isolated input signals
- Automatic idle-current reduction
- Mixed-decay current control for less motor heating
- 14 selectable resolutions up to 50,000 steps/rev
- Suitable for 2-phase and 4-phase stepping motors
- Over-current, over-voltage protection
- Small size (M880:119 x 97 x 48 , M840:119 x 97 x 31 )
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Introduction:
M880/M840 are high performance microstepping drivers based on one of the most advanced technologies in the world today. They are suitable for driving any 2-phase and 4-phase hybrid step motors. By using advanced bipolar constant-current chopping technique, they can output more speed and power from the same motor, compared with traditional technologies such as L/R drivers. Its 3-state current control technology allows coil current to be well controlled, with relatively small current ripple and results in less motor heating.
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Applications:
Suitable for a wide range of stepping motors of size Nema 34 and 43, and usable for various kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines, and pick-place devices. Extremely suitible for applications expected to be low vibration, high speed and high precision. |
| Electric Specifications (Tj=25o) |
| Parameters |
M880/M840 |
| Min. |
Typical |
Max. |
Unit |
| Peak Output Current |
2.8,/1.4 |
- |
7.8,/3.9 |
Amps |
| Supply voltage |
+24 |
+68 |
+90 |
VDC |
| Logic signal current |
7 |
10 |
16 |
mA |
| Pulse input frequency |
0 |
- |
300 |
Khz |
| Isolation resistance |
500 |
- |
- |
MΩ |
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| Mechanical Specifications (Unit: mm, 1 inch=25.4 mm) |
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| Pin Assignment and Description |
| Control Signal Connector P1 pins |
| Pin Function |
Details |
| PUL﹢(+5V) |
Pulse signal: in single pulse(PUL/DIR) mode, this input represents pulse signal, effective for each upward-rising edge; in double pulse mode (CW/CCW) this input represents clockwise(CW)pulse. For reliable response, pulse width should be longer than 3us. |
| PUL- (PUL) |
| DIR+ (+5V) |
DIR signal: in PUL/DIR mode, this signal has low/high voltage levels, representing two directions of motor rotation; in CW/CCW mode (set by inside jumper JPI), this signal is counter-clock (CCW) pulse, effective on each rising edge. For reliable motion response, direction signal should be sent to driver 5us before the first pulse of a motion direction reversal. |
| DIR- (DIR) |
| ENA+ (+5V) |
Enable signal: this signal is used for enabling/disabling the driver. High level for enabling the driver and low level for disabling the driver. Usually left unconnected(enabled). |
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| Power connector P2 pins |
| Pin Funtion |
Details |
| Gnd |
DC power ground |
| +V |
DC power supply, +18VDC － +80VDC, Including voltage fluctuation and EMF voltage. |
| Phase A |
Motor coil A (leads A+ and A-) |
| Phase B |
Motor coil B (leads B+ and B-) |
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| Microstep Resolution Selection |
| Microstep resolution is set by SW5, 6, 7, 8 of the DIP switch as shown in the following table: |
| Microstep |
ustep/rev.(for 1.8°motor) |
SW5 |
SW6 |
SW7 |
SW8 |
| 2 |
400 |
on |
on |
on |
on |
| 4 |
800 |
on |
off |
on |
on |
| 8 |
1600 |
on |
on |
off |
on |
| 16 |
3200 |
on |
off |
off |
on |
| 32 |
6400 |
on |
on |
on |
off |
| 64 |
12800 |
on |
off |
on |
off |
| 128 |
25600 |
on |
on |
off |
off |
| 256 |
51200 |
on |
off |
off |
off |
| 5 |
1000 |
off |
on |
on |
on |
| 10 |
2000 |
off |
off |
on |
on |
| 25 |
5000 |
off |
on |
off |
on |
| 50 |
10000 |
off |
off |
off |
on |
| 125 |
25000 |
off |
on |
on |
off |
| 250 |
50000 |
off |
off |
on |
off |
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| Current Setting |
| Current for M840 |
Current for M880 |
SW1 |
SW2 |
SW3 |
| 1.4A |
2.8A |
on |
on |
on |
| 1.8A |
3.5A |
off |
on |
on |
| 2.1A |
4.2A |
on |
off |
on |
| 2.5A |
4.9A |
off |
off |
on |
| 2.9A |
5.7A |
on |
on |
off |
| 3.2A |
6.4A |
off |
on |
off |
| 3.5A |
7.0A |
on |
off |
off |
| 3.9A |
7.8A |
off |
off |
off |
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| Typical Connections |
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