background image

26

Setting for Brush motor with tachogenerator

In this configuration, the drive must set with the following solder bridges and below internal set-
ting:

RDT resistor calculations

To calculate RDT resistor, please use the following formula:

RDT (Kohm) = Kdt * N * 9,7

                        1000 * Vref

Example: Brush DC motor with the tachogenerator costant Kdt=10V/KRPM, max. speed 2500RPM 
at 10V of speed reference. The result is below:

RDT (Kohm) = 10 * 2500 * 9,7

                                1000 * 10

Insert the commercial value resistance 18Kohm. Prefer resistance with 1% tolerance.

Note:
RDT is the value of resistor expressed in Kohm with a power rating of 1/8 or 1/4w.
Kdt is the tachogenerator costant V/KRPM.
N is the max speed express in RPM.
Vref is the max v/-VEL reference express in Volts.

Once the resistor RDT is inserted, proceed with final speed adjustment.
Operate using trimmer SPEED on the front of the drive. With Clockwise Rotation the speed increases.
With Counter Clockwise Rotation the speed decreases. The Range of regulation is about +/- 25%.











SOLDER BRIDGES

In this configuration, the drive must set with the following solder bridges and below internal setting:

Solder Bridges set for:

- Tachogenerator feedback

- Ramp time disabled

- Standard Dynamic constant

ADJUSTEMENT ZONE

Note: On the adjustement zone are not considered

here the other components used to determine other

calibrations "for example. Calibration current rating

etc.".

RDT (Kohm) =  Kdt * N * 9,7

1000 * Vref

- 7,9

Example: Brush DC motor with the tachogenerator costant Kdt=10V/KRPM, max. speed 2500RPM at

10V of speed reference. The result is below:

RDT (Kohm) =  10 * 2500 * 9,7

1000 * 10

- 7,9 =  16.4 Kohm

Insert the commercial value resistance 18Kohm. Prefer resistance with 1% tolerance.

Note:

RDT

 is the value of resistor expressed in Kohm with a power rating of 1/8 or 1/4w.

Kdt

 is the tachogenerator costant V/KRPM

N

 is the max speed express in RPM.

Vref

  is  the max v/-VEL reference express in Volts.

To calculate RDT resistor, please use the following formula:

Once the resistor 

RDT

 is inserted, proceed with final speed adjustment.

Operate using trimmer SPEED on the front of the drive. With Clockwise Rotation the speed increases.

With Counter Clockwise Rotation the speed decreases. The Range of regulation is about +/- 25%.



- 7,9

- 7,9 = 16.4 Kohm

Summary of Contents for MDCA 100

Page 1: ...1 MDCA XXX XX Precision Servodrive for DC motors...

Page 2: ...2...

Page 3: ...input 16 2 8 Ausiliary power supply V 16 2 9 Encoder inputs 16 2 10 Limit switch inputs 17 18 Chapter 3 3 0 Power supply construction 19 20 3 1 Connections to earth and ground 21 3 2 Note about Conne...

Page 4: ...4 MDCA XXX XX...

Page 5: ...til all the leds are turned off before touching removing connecting or any other critical action Never disconnect any connectors before powering down the drive Warning of dangerous current present In...

Page 6: ...ncoder DC motor with internal PWM Armature DC motor with tachogenerator It is speed piloting using an analogue reference differential or common mode It is torque piloting using an analogue reference T...

Page 7: ...frequency Operating temperature Storage temperature Drift analog input Analog inputs VEL Velocity monitor output Test Power supply output V Power supply output 9 8V Encoder max frequency Fault drive o...

Page 8: ...minal 10 pins GMST 2 5 10 G 5 08 pitch 5 08 11 POWER Terminal 4 pins GMST 2 5 5 G 5 08 pitch 5 08 1 Product Label 2 Fixing screw 3 Product Cover 4 Solder bridges 5 Adjustement zone 6 Four calibration...

Page 9: ...rvodrive in the electrical box make sure that do not enter leading wires of copper or iron chips through the slits Before performing the work cover the holes with a piece of paper tape Naturally finis...

Page 10: ...dimensions Dimensions in mm and Inch V Standard radiator fan cooling below the converter operating temperature 0 to 45 C If you need the converter mounted horizontally remove the cover Dimensions in m...

Page 11: ...1 4W o 1 8W resistor between the REQ pin 2 and GND pin 3 terminals A 47Kohm external resistor reduces the current by 50 Note The drive velocity loop remains active 2 Torque request by REQ setting Rang...

Page 12: ...you can command the drive in torque mode Applying a signal of 10V at REQ the Drive to supply positive or negative peak current The formula to determine the value of Voltage to apply in REQ in order t...

Page 13: ...t allows the reversal of the rotation motor speed The current capacity of the output is max 4mA Output 9 8V can also be used to enable the converter With an external potentiometer connected from GND a...

Page 14: ...m shows an application using speed reference connections from C N C in the Common Mode This analog in common mode has a 20Kohm of impedance input The following figure shows an application with speed r...

Page 15: ...ue of 50V Example If you use a 10V KRPM no more than 5000rpm If the motor rotates in an opposite direction to the expected one switch off and reverse the motor and tachogenerator connections View the...

Page 16: ...the connections and settings from encoder in chapter 4 1 2 10 Limit switch inputs It s possible to enable clockwise CW and counter clockwise CCW motor rotation by connec ting the L SW and L SW inputs...

Page 17: ...SW inputs if the soldiering point SG and SH are closed When one of these said contacts is intercepted the motor stops with the required inertia Fig 1 Fig 2 Example with external positive voltage betwe...

Page 18: ...transformer V2 is 45Vac the VDC output is 45 1 41 64Vdc PAY ATTENTION The drive has zero signal GND in conjunction with the zero power GND thereby preventing the following links Use a standard heavy d...

Page 19: ...ary fuse F1 on the hot leg of the AC input power and the secondary fuse F2 on the side of the secondary output before the rectifier Primary of the transformer Use the formula below to calculate the co...

Page 20: ...LC CNC frames the 0V of the auxiliary supply 2 Connect the ground bar to the zinced panel of the drive by using a screw then connect that screw to earth 3 Connect earth to the motor s It suggests a co...

Page 21: ...t from disturbances conduc ted or produced by the drive series of filters released are available for this purpose Power supply Power supply NO YES In the case of multiple servodrives on the same power...

Page 22: ...and page for each chosen velocity feedback is shown a typical connection with the notes of wiring of the converter The adjustments are located inside the converter All calibration pins are mount on he...

Page 23: ...R Is possible to use the 5V output V terminal for the supplies the encoder Note the maximum load on terminal V is 130mA The following diagram shows an tipical application utilizing a Dc One with Brush...

Page 24: ...eases The Range of regulation is about 25 The drive is standard set with solder bridge S8 closed and the resistance calibration speed RENC already mounted on board 27Kohm Calibration for speed 3000rpm...

Page 25: ...nabled through the following settings on the solder point and the insertion of RDT resistance on the adjstustement zone The following diagram shows an tipical application utilizing a Dc One with Brush...

Page 26: ...is configuration the drive must set with the following solder bridges and below internal setting Solder Bridges set for Tachogenerator feedback Ramp time disabled Standard Dynamic constant ADJUSTEMENT...

Page 27: ...through the following settings on the solder point and the insertion of RA and RCA resistance on the adjstustement zone The following diagram shows an tipical application utilizing a Dc One with Brush...

Page 28: ...JUSTEMENT ZONE Note On the adjustement zone are not considered here the other components used to determine other calibrations for example Calibration current rating etc RA 33 27 22 18 15 12 10 8 2 6 8...

Page 29: ...insertion of the resistor the motor is unstable increase the Resistance value of RCA 4 4 Current adjustement RIN resistor rated current adjustment Resistance RIN limits the value of the rated current...

Page 30: ...ndard with mounted 470ohm resistance value 0 8 sec ramp Ramp disabled standard setting Value of RIP in Kohm Size drive A Note No resistor mounted Peak Current request A VEL MOTOR T T 3 3V 2V VEL MOTOR...

Page 31: ...ible increase decrease the speed of the motor with range 25 OFFSET Offset adjustment Allows the balance to zero motor speed Adjust this potentiometer to cancel any motor speed offset when the Velocity...

Page 32: ...bes of an oscilloscope at those points The zero signal 0S zero probes can be connected by a wire to pin 4 M1 signals connector pitch 3 81 Motor fine speed calibration With rotating clockwise CW or cou...

Page 33: ...mic calibrations are performed using a reference speed in VEL of about 1 or 2V You can use the voltage output from the CNC control paying attention to rule out the correction of space Or use an extern...

Page 34: ...ncoder power supply missing or tachogenerator signals swapped Possible reason for the allarms of the drive When power supply is on the green OK LED doesn t come on Check the voltage between HV and GND...

Page 35: ...35 Hier ist Platz f r Ihre Notizen Mattke AG Leinenweberstra e 12 D 79108 Freiburg Tel 49 0 761 15 23 4 0 Fax 49 0 761 15 23 4 56 info mattke de www mattke de...

Page 36: ...36 V 1 0...

Reviews: