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Add:No.45 Qianjia Industrial Zone,Yaoguan Town,Wujin District,Changzhou,China.
Zip:213011
Tel:+86 519 88770103
Fax:+86 519 88770103
Skype: calla_1985
Website: www.suncormotor.com
Email: info@suncormotor.com

 victor@suncormotor.com

SC258M

Changzhou Suncor Motor Co., Ltd
Add.No.45 Qianjia Industrial Zone,Yaoguan Town,Wujin District,Changzhou,China.Zip:213011
Tel:+86 519 88770103
Fax:+86 519 88770103
Skype: calla_1985
Website: www.suncormotor.com
Email: info@suncormotor.com ;  victor@suncormotor.com

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Brief Description of SC258M

SC258M is a new-generation digital 2-phase stepper motor driver based on DSP control. The driver combines advanced DSP control technique and unique control circuit. The driver voltage is DC24-80V and driver current is below 5.0A. The driver can be used for types of 2-phase stepper motor with external diameter 42-57mm. The driver adopts circuit similar to servo control, so the motor can run smoothly with little vibration and noise. And the maximum positioning accuracy could reach 40,000 steps/rev. The product is widely used in small and medium-sized CNC equipment with higher resolution, such as the engraving machine, the automatic disperser, the filature, the small-sized CNC machine tool, packing machine, etc. 


Specifications

●High performance, low price

●The driver features 16-grade micro-stepping with equal angular degree and constant torque; the highest resolution may reach 40,000 steps/rev, other special micro-stepping can be customized.

●The highest response frequency can reach 150Kpps

●When the step-by-step impulse has halted for over 100ms, the coil current will automatically reduce to half of the set value, to effectively reduce motor warming. 

●Driver current from 0.5A / phase to 6.0A / phase, adjustable with 16 grades 

●Single power input, voltage range: DC 24V to 80V 

●Phase memory function (when the input has stopped unexpectedly or powered off, the driver will automatically memorize motor phase at that time.)

●I/O signal, the driver uses photoelectric isolation technique and signal level is 5V ~ 24V, compatible 

●Function of pulse smooth technique makes the motor run stably at low speed. The level of smooth can be adjusted.

●It features motor inductance adjustment function, giving full play to the adaptive motor. 


Front View

20200710101904676.jpg20200710101912562.jpg

Port Function

Port definitionPin numberMark symbolFunctionNotes
RS-2321RXReceiving data

Connected to serial port RX of upper compute

r (function preservation)

2TXSending data

Connected to serial port TX of upper compute

r (function preservation)

3GNDGround wire

Connected to serial port ground of upper computer 

(function preservation)

45V5V power

Connected to serial port power of upper computer

 (function preservation)

Signal port1PU+

Positive terminal of input

 photoelectric isolation signal

Driven by +5V-+24V signal; 
2PU-

DP5 = OFF, PU is

 step-by-step impulse signal

Falling edge is effective; whenever the impulse 

drops from high to low

, the motor moves one step.

Requirements: pulse width> 2.5μS

DP5 = ON, PU is positive 

step-by-step impulse signal

3DR+

Positive terminal of input

 photoelectric isolation signal

Driven by +5V-+24V signal;
4DR-

DP5 = OFF,

 DR is direction control signal

Used to change turning direction of the motor.

 Requirements: pulse width> 2.5μS

DP5 = ON, DR is negative

 step-by-step impulse signal

5MF+(ENA+)

Positive terminal of inpu

t photoelectric isolation signal

Driven by +5V-+24V signal;
6MF-(ENA-)The motor release signal

When it is active (at low level),

 the motor wiring current is turned off, 

and the driver stops working; 

the motor is in a free mode.

7RDY+

The driver is ready to output positiv

e photoelectric isolation signal.

When the driver is in normal state,

 ready to receive controller signal, 

the signal is active (at low level).

8RDY-

The driver is ready to output negativ

e photoelectric isolation signal.


Motor wiring power supply terminal1A+Motor wiring
2A-
3B+
4B-
6DC-Power supplyPower Supply: DC24 ~80V 
7DC+


Signal Input Wiring


Common anode connection of input signal 

20200710102140990.jpg

Controller                          Driver

Common cathode connection of input signal 

20200710102222520.jpg

Controller                          Driver

Current & Micro Steps Setting


Current setting

The working current of the driver is set by DIP-1 terminal, the working current is normal working output current (note: the current is effective current) 

Working current(A)0.50.81.21.51.82.02.32.52.83.03.23.53.84.04.55.0
D1OFFOFFOFFOFFOFFOFFOFFOFFONONONONONONONON
D2OFFOFFOFFOFFONONONONOFFOFFOFFOFFONONONON
D3OFFOFFONONOFFOFFONONOFFOFFONONOFFOFFONON
D4OFFONOFFONOFFONOFFONOFFONOFFONOFFONOFFON


Micro-stepping setting 

The micro-step is set by DIP-2 with 16 levels. The first 4 dip of DIP-2 is for micro-step setting and the last 2 dip is for function setting. 

The attached table: steps (pulse/rev)


Step No. 200400800100016002000320040005000640080001000012800200002560040000
D5ONONONONONONONONOFFOFFOFFOFFOFFOFFOFFOFF
D6ONONONONOFFOFFOFFOFFONONONONOFFOFFOFFOFF
D7ONONOFFOFFONONOFFOFFONONOFFOFFONONOFFOFF
D8ONOFFONOFFONOFFONOFFONOFFONOFFONOFFONOFF
D4OFF: Motor blocked with half current

ON:Motor blocked with full current


Possible problems & Solutions

ProblemPossible reasonMeasure
Motor not run

No light with “POW” or ”ALM”

 indicator light

To check if the power supply is normal 

“ALM” indicator light is on To check overcurrent or overheating, motor missing

The motor shaft is locked, 

the motor cannot operate. 

To check external control signal 

Indicator light shows normal, 

and the motor shaft is unlocked 

To check if MF signal is active 
Motor blockedThe max speed is set too highTo lower the max speed

The time for speeding up is too short

To lengthen the time or increase the pulse

 filtering constant of the driver

Inaccurate positionThe micro-stepping number is not correct To select the correct micro-stepping number 

Excessive load for the motor 

To replace the motor or moderately increase

 running current of the driver

"Leakage" phenomenonThe driver and motor is not reliably grounded To reliably ground the driver and the motor 
Severe warming of the driver and the motor

Large running current of the driver

 or bad external thermal conditions

To moderately reduce driver running current or improve 

ventilation of the driver and the motor


Caution

1.The input voltage is lower than DC80V.

2.Falling edge is effective of input pulse signal. If you need the rising edge to be effective, please set inner parameter of the driver.

3.When the driver temperature goes beyond 75 degrees, it will halt working, and the fault indicator ALM will be on. Until the temperature drops to 50 degrees, the driver may resume work after a second-time power-on. In case of such overheat protection, please install heat sink. 

4.In case of overcurrent (short circuit of load), the fault indicator ALM will be on. Please check motor wiring and other fault of short circuit; after the fault is removed, it will resume upon a second-time power-on. 

5.In case of no motor, the fault indicator ALM will be on. Please check motor wiring; after the fault is removed, it will resume upon a second-time power-on. 



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