BFD5056S Digital Stepper Driver for Nema 23 24 34 Stepper Motor

BFD5056S is a new digital stepper motor driver by BesFoc. It adopts the latest 32-bit DSP digital processing technology. The drive control algorithm adopts advanced variable current technology and advanced frequency conversion technology. The driver has small heating, small motor vibration and stable operation. Users can set any subdivision within 200 ~ 51200 and any current value in the rated current to meet the application needs in most occasions. Thanks to the built-in micro-subdivision technology, the subdivision effect can be achieved even under the condition of low subdivision. The operation is smooth and the noise is ultra-small under low, medium and high speed. The driver integrates the parameter auto-adjust function, which can automatically generate optimal operating parameters for different motors to maximize the performance of the motor.

BFD5056S Stepper Motor Driver Features：

New 32-bit DSP technology
Ultra-low vibration noise
Built-in high subdivision
Automatic parameter adjustment function when power on
Variable current control reduces the heating of the motor
The current automatically halve at rest
Can drive two phase stepping motors of 4, 6, 8 lines
Optical isolation differential signal input
The pulse response frequency can reach to 500KHz（Factory default 200KHz）
The current setting is convenient and can choose between 0.1 to 5.0A
Subdivision setting range is between 200 to 51200
Has the protection function of overpressure, underpressure and overcurrent

Electrical Specifications:

Output Peak Current: 0.1A - 5.6A (Peak)
Input Voltage: +24VDC - 72VDC
Control signal input current: 6mA - 16mA
Control signal interface level: 4.5Vdc - 28Vdc
Input signal minimum pulse width: ≥1.5us
Stepper pulse frequency: 0 - 200KHz
Insulation resistance: ≥100MΩ

Operating Environment and other Specifications:

Occasion: Can not be placed next to other heating equipment, should avoid dust, oil mist, corrosive gas, too big humidity and strong vibration place, prohibit to have combustible gas and conductive dust
Humidity: 40 - 90%RH
Vibration: 5.9m/s2MAX
Environment: Avoid dust, oil fog and corrosive gases
Humidity: 40%RH－90%RH
Operating Temperature: -5℃ - 50℃
Storage Temperature: -20℃ － 80℃

Hybrid Stepper Motor Driver Description：

Brand	BesFoc
Model	BFD5056S
Driver Type	Digital Stepper Driver
DC / AC	DC
Suitable Motor	Nema 23 24 34 Hybrid Stepper Motor
Input Voltage	18V - 72V
Output Current	1.46A - 5.0A
Subdivide Setting	16 (400 - 25600)
Storage Environment	-20℃ - 80℃

Electrical Specifications:

Item	Unit	Min	Typical	Max
Input Current	VDC	24	36	72
Output Current	A	0.1	-	5.6
Control signal input current	mA	6	10	16
Control signal interface level	Vdc	4.5	5	28
Input signal minimum pulse width	μs	1.5	-	-
Stepper pulse frequency	KHz	0	-	200
Insulation resistance	MΩ	100	-	-

Interface Signal Description：

Pins	Functions
PUL	Pulse signal: pulse rising edge is effective; In PUL high level,voltage is 4.5 ~ 28Vdc, and the low level, voltage is 0 ~ 0.5v. In order to reliably respond to the pulse signal, the pulse width should be greater than 1.5μs
DIR	Direction signal: high/low level signal, to ensure reliable commutation of motor, directional signal should be established before the pulse signal at least 2μs. The initial direction of the motor is connect to motor wiring, change winding (e.g., A +, A - exchange) can change the direction of the motor running, In DIR high level,the voltage is 4.5 ~ 28 VDC,in low level,voltage is 0 ~ 0.5 V.
ENA	Enable signal: this input signal is used to enable or prohibit. ENA+ connect 4.5 ~ 28Vdc, ENA- connect low level (or internal optical coupling), the actuator will cut off the electrical current to keep the motor in a free state and the stepper pulse is not responsive. When this function is not required, the enable signal can be suspended.
A+	A+ Phase of stepper motor
A-	A- Phase of stepper motor
B+	B+ Phase of stepper motor
B-	B- Phase of stepper motor
GND	DC power input: 0V
VDC	DC power input: 20V - 50V, recommend for 36V

DIP Switch Setting：

BFD5056S driver adopts the eight dialing switch to set the subdivision precision, the dynamic current, the static half current and the self-tuning of the motor parameters and internal adjustment parameters. Detailed description as follows:

SW1	SW2	SW3	PEAK（A)	RMS（A）
ON	ON	ON	Default
OFF	ON	ON	1.46	1.04
ON	OFF	ON	1.91	1.36
OFF	OFF	ON	2.37	1.69
ON	ON	OFF	2.84	2.03
OFF	ON	OFF	3.31	2.36
ON	OFF	OFF	3.76	2.69
OFF	OFF	OFF	5.0	3.50
Static current can set by SW4 DIP switch settings, off means the static current is set to half of dynamic current, on means static current and dynamic current is the same. SW4 should be set to off for general use, can reduce the heating of the motor and the driver. About 400ms after the pulse train stopped it will automatically reduced to half current (60% of the actual value), the heat will reduced to 30% theoretically.

Micro step subdivision setting：

Pulse	SW5	SW6	SW7	SW8	Subdivide Description
Default	ON	ON	ON	ON	Subdivision Description: The driver subdivision adopts the internal default subdivision when SW5, SW6, SW7 and SW8 are all on.
400	OFF	ON	ON	ON
800	ON	OFF	ON	ON
1600	OFF	OFF	ON	ON
3200	ON	ON	OFF	ON
6400	OFF	ON	OFF	ON
12800	ON	OFF	OFF	ON
25600	OFF	OFF	OFF	ON
1000	ON	ON	ON	OFF
2000	OFF	ON	ON	OFF
4000	ON	OFF	ON	OFF
5000	OFF	OFF	ON	OFF
8000	ON	ON	OFF	OFF
10000	OFF	ON	OFF	OFF
20000	ON	OFF	OFF	OFF
25000	OFF	OFF	OFF	OFF

BFD5056S Stepper Motor Driver Dimension:

步进驱动器图纸

Nema 23 24 34 Digital Stepper Driver Manual:

BFD5056S digital two phase stepper motor instruction.pdf

1, Q: The motor does not turn and no holding torque:

A: ① check whether the power line is connected to the wrong voltage is too low, need to increase the voltage or correct the power line

② check whether the motor wiring is correct, if not correct motor wiring. Check if the motor wiring is correct, if not, correct the motor wiring.

③ Whether the enable signal is valid, resulting in the motor does not work.

④ Is the subdividing parameter correct?

⑤ Is the current parameter correct?

2、Q：Motor does not rotate but has holding torque:

A: ① The phase sequence of motor wires is wrong, need to swap any two wires.

② Pulse signal input is wrong, need to check the pulse wiring.

3、Q: The motor torque is too small:

A: ① Phase current setting is too small, need to set the phase current corresponding to the motor.

② acceleration is too fast, reduce the acceleration value

③ motor blocking, need to rule out mechanical problems

④ drive and motor mismatch, need to replace the appropriate drive

4、Q：Motor steering error:

A: ① motor line phase sequence is wrong, need to swap any two wires

② motor line has a broken circuit, check and connect the right

5、Q：The alarm indicator light is on:

A: ① Is the motor wire connected incorrectly

② Whether there is over-voltage and under-voltage conditions

③ Motor or driver is damaged

6、Q：Motor acceleration blocking:

A: ① short acceleration time

② motor torque is too small

③ Low voltage or current

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