INTRODUCTION

Thank you for selecting the Resolution Air, Ltd. DRV-1 step motor drive. We hope our commitment to performance, quality and economy will make a successful motion control project.

1.1 OVERVIEW

The DRV-1 Step motor drive is a cost-effective, high performance drive. The design is based on advanced digital current control technology, and features high torque, low noise and low vibration. Running current, microstep resolution, and other parameters are switch selectable so software configuration is not required.

1.2 FEATURES

• Power Supply - Operates from a 12 to 40 volt DC power supply

• Inputs - 3 optically isolated digital inputs, 5 to 24 volts

• Speed Range - up to 3000 rpm

• Current Control - 3 piano switch setting running current, 3 Amps peak maximum

• Idle Current - Switch selectable for reduction to 50% or 90% of running current 1 second after the motor stops

• Self-Test - Performs a 2 rev, 1 rps, CW/CCW move test, switch selectable: ON or OFF

  
  

  
  

• Control Mode - Step & Direction mode, CW/CCW mode

• Microstep Resolution - 4 piano Switch selectable, 16 settings: 200, 400, 800, 1600, 3200, 6400, 12800, 25600, 1000, 2000, 4000, 5000, 6000, 8000, 10000, 20000 steps/rev

1.2 BLOCK DIAGRAM

DRV-1

I/O Configurations
STEP(5-24V)	DIR(5-24V)	EN(5-24V)
: Step Input	: Direction Input	: Enable Input
: CW	: CCW	: Alarm Reset

1.4 SAFETY INSTRUCTIONS

Only qualified personnel should transport, assemble, install, operate, or maintain this equipment. Properly qualified personnel are persons who are familiar with the transport, assembly, installation, operation, and maintenance of motors, and who meet the appropriate qualifications for their jobs.

To minimize the risk of potential safety problems, all applicable local and national codes regulating the installation and operation of equipment should be followed. These codes may vary from area to area and it is the responsibility of the operating personnel to determine which codes should be followed, and to verify that the equipment, installation, and operation are in compliance with the latest revision of these codes.

Equipment damage or serious injury to personnel can result from the failure to follow all applicable codes and standards. Resolution Air, Ltd. does not guarantee the products described in this publication are suitable for a particular application, nor do they assume any responsibility for product design, installation, or operation.

Read all available documentation before assembly and operation. Incorrect handling of the products referenced in this manual can result in injury and damage to persons and machinery. All technical information concerning the installation requirements must be strictly adhered to.

It is vital to ensure that all system components are connected to earth ground. Electrical safety is impossible without a low-resistance earth connection.

This product contains electrostatically sensitive components that can be damaged by incorrect handling. Follow qualified anti-static procedures before touching the product.

During operation keep all covers and cabinet doors shut to avoid any hazards that could possibly cause severe damage to the product or personal health.

During operation the product may have components that are live or have hot surfaces.

Never plug in or unplug the step motor drive while the system is live. The possibility of electric arcing can cause damage.

Be alert to the potential for personal injury. Follow all recommended precautions and safe operating practices. Safety notices in this manual provide important information. Read and be familiar with these instructions before attempting installation, operation, or maintenance.

The purpose of this section is to alert users to the possible safety hazards associated with this equipment and the precautions necessary to reduce the risk of personal injury and damage to equipment. Failure to observe these precautions could result in serious bodily injury, damage to the equipment, or operational difficulty.

2 GETTING STARTED

To use the DRV-1 step motor drive, the following items are needed:

A 12 - 40 volt DC power supply, see the section below entitled “Choosing a Power Supply” for help in choosing the right one

Step & Direction signals

A small flat blade screwdriver for configuring the switches

2.1 MOUNTING HARDWARE

As with any step motor, the DRV-1 must be mounted so as to provide maximum heat sinking and airflow. Keep enough space around the Step motor drive to allow for airflow.

Never use the drive where there is no airflow or where other devices cause the surrounding air to be more than 40°C (104°F).

Never put the drive where it can get wet.

Never use the drive where metal or other electrically conductive particles can infiltrate the drive.

Always provide airflow around the drive.

2.2 CHOOSING A POWER SUPPLY

When choosing a power supply, there are many things to consider. If you are manufacturing equipment that will be sold to others, you probably want a supply with all the safety agency approvals. If size and weight are an issue get a switching supply. And you must decide what size of power supply (in terms of voltage and current) is needed for your application.

2.2.1 VOLTAGE SELECTION

Your motor can provide more torque at higher speeds if a higher power supply voltage is used .If you choose an unregulated power supply, make sure the no load voltage of the supply does not exceed the drive’s maximum input voltage specification.

2.2.2 CURRENT

The maximum supply current you could ever need is two times the motor current.

However, you will generally need a lot less than that, depending on the motor type, voltage, speed and load conditions. That’s because the DRV-1 uses a switching amplifier, converting a high voltage and low current into lower voltage and higher current. The more the power supply voltage exceeds the motor voltage, the less current you’ll need from the power supply. A motor running from a 40 volt supply can be expected to draw only half the supply current that it would with a 24 volt supply.

We recommend the following selection procedure:

1. If you plan to use only a few drives, get a power supply with at least twice “per phase” current rating of the step motor. Example: for a motor that’s rated for 2 A/phase use a 4A power supply.

2. If you are designing for mass production and must minimize cost, get one power supply with more than twice the rated current of the motor. Install the motor in the application and monitor the current coming out of the power supply and into the drive at various motor loads. This will tell you how much current you really need so you can design in a lower cost power supply.

Multiple Drives Sharing One Power Supply

You can use one supply to power multiple drives. The worst case condition occurs when all the drives are running simultaneously. In this case, just add up the power supply currents for each to determine the total power supply current requirements

1. Connections

   
   

   

3.1 CONNECTING THE POWER SUPPLY

If the power supply does not have a fuse on the output or some kind of short circuit current limiting device a fast acting fuse is required. A 3 Amp fast acting fuse should be installed in line with the“+” power supply lead.

Connect the power supply “+” terminal to the drive “ V+” terminal. Connect the power supply “-”

terminal to the drive “ V-” terminal.

Be careful not to reverse the wires. Reversing the connection may open the internal fuse and void the warranty.

If a regulated power supply is being used, there may be a problem with regeneration. When a load decelerates rapidly from a high speed, some of the kinetic energy of the load is transferred back to the power supply, possibly tripping the over-voltage protection of a regulated power supply, causing it to shut down.

1. CONNECTING THE INPUTS & OUTPUTS

   
   

   1. CONNECTOR PIN DIAGRAM

3.2.2 STEP & DIR INPUTS

The DRV-1 step motor drive has two high speed optically isolated inputs called STEP and DIR. They accept 5 to 24 volt single-ended or differential signals, up to 500KHz. The maximum voltage that can be applied to the input is 28V.

The motor executes one step when the STEP input closes.

The direction of rotation is controlled by the DIR input state. A closed input (logic “0”) will result in clockwise rotation, and an open input (logic “1”) will result in counterclockwise rotation.

3.2.3 EN INPUT

The EN input enables or disables the drive Amplifier. It is an optically isolated input that accepts a 5 to 24 volt single-ended or differential signal. The maximum voltage that can be applied to the input is 28V.

When EN input is closed, the drive Amplifier is deactivated. All the MOSFETs will shut down, and the motor is free. When EN input is open, the drive is activated.

When the drive has encountered an error and the fault is removed from system, a falling signal into the EN input will reset the error status and activate the drive Amplifier again.

Switch Selecting

4.1 RUNNING CURRENT

The output current of the DRV-1 step motor drive is set by the SW1, SW2 and SW3 switches and can be changed as necessary. There are 8 settings available according to the ON/OFF combination of the switches. Resolution Air, Ltd. MPPV-Series of valves are set to 0.4 Amp setting.

Current (Amps) (peak of sine)	SW1	SW2	SW3
0.4	ON	ON	ON
0.8	OFF	ON	ON
1.2	ON	OFF	ON
1.6	OFF	OFF	ON
2.0	ON	ON	OFF
2.4	OFF	ON	OFF
2.7	ON	OFF	OFF
3.0	OFF	OFF	OFF

4.2 IDLE CURRENT

The running current of the DRV-1 is automatically reduced whenever the motor isn’t moving. Setting the SW4 switch to ON maintains 50% of the running current. Setting this switch to OFF maintains 90% of the running current. This 90% setting is useful when a high holding torque is required. To minimize motor and drive heating it is highly recommended that the idle current reduction feature be set to 50% unless the application requires the higher setting.

50%   90%

4.3 MICROSTEP SETTING

DRV-1 setting switch SW5, SW6, SW7, SW8. There are 16 settings.

Steps/Rev	SW5	SW6	SW7	SW8
200	ON	ON	ON	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
6000	ON	ON	OFF	OFF
8000	OFF	ON	OFF	OFF
10000	ON	OFF	OFF	OFF
20000	OFF	OFF	OFF	OFF

4.4 SELF-TEST

A built-in self-test feature is available on the DRV-1 to check the physical operation of the motor. Setting switch SW9 to ON after the drive is powered up will cause the drive to perform a self-test move of 2 revolutions both CW and CCW at 1rps. Setting switch SW9 to OFF disables this feature

ON   OFF

4.5 STEP SMOOTHING FILTER

Command signal smoothing can soften the effect of immediate changes in velocity and direction, making the motion of the motor less jerky. An added advantage is that it can reduce the wear on mechanical components. SW10 selects this function - ON enables it, OFF disables it.

This function can cause a small delay in following the control signal, and it should be used with that in mind.

ON   OFF

4.6 CONTROL MODE

Switch SW11 sets control mode. Switch OFF sets the Step & Dir mode. Switch ON sets the CW/ CCW mode.

4.7 STEP NOISE FILTER

Switch SW12 sets the digital signal filter. The STEP and DIR signal inputs have built-in digital filters and this setting will reduce external noise. If the system works on the low microstep, select the 150 KHz (ON) setting. If the system works on the high microstep, select the 500KHz (OFF) setting.

  ON        OFF
150KHz   500KHz

4.8 MOTOR SELECTION

Motor wires setting：

B- B+ A- A+

NOTE: MPPV-Series of Valves: A+(Red),A-(Black),B+(Blue),B-(Green)

MPPV-HR & PPV-HR Series: A+(Green),A-(Green w/White, B+(Red),B-(Red w/White)

Troubleshooting

LED Error Codes

Code		Error
	Solid	Motor Disabled
	Flashing	Motor Enabled
	3 red, 1 green	Over Temperature
	3 red, 2 green	Bad Internal Voltage
	4 red, 1 green	Power Supply Over Voltage
	4 red, 2 green	Power Supply Under Voltage
	5 red, 1 green	Over Current/Short Circuit
	6 red, 1 green	Open Winding

1. REFERENCE MATERIALS

   
   

   1. TECHNICAL SPECIFICATIONS

Power Amplifier
Amplifier Type	Dual H-Bridge, 4 Quadrant
Current Control	4 state PWM at 16 KHz
Power Supply	External 12 - 48 volt power supply required
Input Voltage Range	12 - 40 volts nominal, voltages outside this range will cause driver faults and/or may damage the drive
Protection	Over-voltage, over-current, under-voltage, over-temp, internal motor shorts (phase-to-phase, phase-to-ground)
Ambient Temperature	0 - 40°C (32 - 104°F) when mounted to a suitable heat sink
Humidity	90% non-condensing

Controller
Current Control	Advanced digital current control provides excellent high speed torque
Speed Range	Speeds up to 3000 rpm
Auto Setup	Measures motor parameters to configure current control and anti-resonance gain settings
Step Input STEP+/-	Inputs: optically isolated, 5 - 24 volts, min. pulse width 250 us., max. pulse frequency 500KHz; motor executes one step when the STEP input closes
Direction Input DIR+/-	Inputs: optically isolated, 5 - 24 volts, min. pulse width 62.5 us., max. pulse frequency 500KHz; direction of rotation is controlled by the DIR input state
Enable Input EN+/-	Inputs: optically isolated, 5 - 24 volts, min. pulse width 500 us., max. pulse frequency 10 KHz; enables or disables the drive Amplifier
Running Current	Switch selectable, 8 settings: 3 Amps peak maximum
Idle Current Reduction	Automatically reduces the current 1 second after the motor stops; switch selectable, 2 settings: 50% or 90% of the running current
Microstep Resolution	Switch selectable, 16 settings: 200, 400, 800, 1600, 3200, 6400, 12800, 25600 1000, 2000, 4000, 5000, 6000, 8000, 10000, 20000 steps/rev
Self-Test	Checks internal and external power supply voltages, 2 rev move both CW and CCW at 1rps, switch selectable, ON or OFF
Modes Of Control	Step & Direction, CW/CCW control

Drive Set-up

Resolution Air, Ltd. P.N.	DVR-1
Stepper Drive Requirements	See DRV-1 Manual for Complete Details
Power	12-40 VDC
Input Signals	Step, Direction, and Enable
Input Signal Types	Sinking, Sourcing, Differential
Power Settings	MPPV-HR: SW1,2,3=ON
	PPV-HR: SW1=Off, SW2 & 3=ON
Idle Current	SW 4=ON (50%)
MicroStep	Sw5,6,7,8 = On: Full Step
Self Test	SW9=Off: Disabled
Smoothing Filter	SW10 = On: Enabled
Control Mode	SW11 = OFF : Step/Dir
Step Filter	SW12 = on: 150 KHz
Encoder-MPPV-HR	U.S.Digital P.N.: E4P-200-197-N-S-H-D-B
Encoder-PPV-HR	U.S.Digital P.N.: E5-400-315-NE-S-H-D-B

Stepper Motor Characteristics

Resolution Air, Ltd. P.N.	MPPV-HR-E-	PPV-HR-E-
Actuator Size	(0.8")Size 8 Hybrid Linear Actuator	(1.4") Size14 Hybrid Linear Actuator
Step Angle	1.8 Degrees	1.8 Degrees
Wiring	Bi-Polar	Bi-Polar
Operating Voltage	5 VDC	5 VDC
Current/Phase	0.24 A RMS	0.57 A RMS
Resistance/Phase	20.4 Ω	8.8 Ω
Inductance/Phase	5.0 mH	13 mH
Power Consumption	2.45 W	5.7 W
Temperature Rise	135° F.	135° F.
Isulation Resistance	20 MΩ	20 MΩ
Rotor Inertia	N/A	27.0 gcm²
Wiring Hookup	A+(Grn),A-(Grn w/ White),B+(Red),B-(Red w/White	A+(Grn),A-(Grn w/ White),B+(Red),B-(Red w/White