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maxon motor 

Operating Instructions 

1-Q-EC Amplifier DEC 50/5 

4.2  Adjusting the potentiometers 

4.2.1 Pre-adjustment 

With the pre-adjustment, the potentiometers are set in a preferred position. 
 
DEC units in the original packing are already pre-set. 
 
 
 
 

P

1

 S

p

e

e

d

 1

P

2

 S

p

e

e

d

 2

 /

 R

a

m

p

P

3

 I

m

a

x

 

Pre-adjustment of potentiometers 

 

P1 

Speed 1 

50 % 

 

P2 

Speed 2 / Ramp 

50 % 

 

P3 

I

max

50 % 

 

Note 

 

Left end stop of potentiometers:  

Minimum value 

 

Right end stop of potentiometers: 

Maximum value 

 
 

4.2.2 Adjustment 

 

Digital speed control

 

1. 

Depending on operating mode selected, predetermine set value so that 
required speed is reached. If necessary, adjust max. speed with switch 

S5

 and 

S6

 (see 

chapter 7, “Speed Ranges”

). 

 2. 

Adjust potentiometer

 P3 I

max

 to required limiting value. 

Maximum current in the 0 … 10 A range can be adjusted in linear fashion 
with potentiometer 

P3

 

3. 

Adjust switch 

S2 gain

 to required amplification 

(

S2

 OFF: gain high, 

S2

 ON: gain low) 

Important:

 If the motor is unsteady, vibrates or makes noises, the se-

lected amplification is too high. Switch 

S2

 must be set at ON. 

 
 

  Digital current control

 

1. 

Adjust potentiometer 

P1 Speed 1

 to required speed limit. Maximum 

speed in the 500 ... 25 000 rpm range (motor with 1 pole pair) can be 
adjusted in linear fashion with potentiometer 

P1

, and is independent of 

the position of the switches 

S5

 and 

S6

 (see 

chapter 7, “Speed Ranges”

). 

 2. 

Predetermine set value at “Speed” input so that required torque is 
reached. 

 

Note 

 

A set value in the 0 ... 5 V range at the “Speed” input is equal to a current 
adjustment range of approx. 0 … 5 A. 

 

Band width of current control: approx. 15 Hz 
 
 

Digital open loop 

speed control

 

1. 

Predetermine set value at “Speed” input so that required speed is 
reached. The set value range of 0 ... +5 V is equal to a motor voltage 
range of 0 V ... V

CC

. The maximum speed is determined by the supply 

voltage and the speed constant of the motor and is independent of the 
position of the switches 

S5

 and 

S6

 2. 

Adjust potentiometer

 P3 I

max

 to required limiting value. 

Maximum current in the 0 … 10 A range can be adjusted in linear fashion 
with potentiometer 

P3

October 2008 Edition / Doc.No. 544910-06 / subject to change 

maxon motor control 

7

 

Summary of Contents for 1-Q-EC

Page 1: ...ges can be selected or through analogue set value input 0 5 V Maximum current limit adjustable Gain can be adjusted in two stages Adjustable speed ramp Protection against heat overload Blockage protec...

Page 2: ...ectly if the control unit breaks down or if the cables break etc it must be ensured that the drive or the complete apparatus is kept in a safe operating mode Repairs Repairs may only be carried out by...

Page 3: ...Motor connections Motor winding 1 Motor winding 2 Motor winding 3 2 6 Trim potentiometers Speed 1 Speed 2 Ramp Imax gain 2 7 LED indicator Operating indicator green LED Error indicator red LED 2 8 Amb...

Page 4: ...tor 1 Q EC Amplifier DEC 50 5 Operating Instructions 3 Minimum External Wiring for Different Modes of Operation 3 1 Speed control 4 maxon motor control October 2008 Edition Doc No 544910 06 subject to...

Page 5: ...maxon motor Operating Instructions 1 Q EC Amplifier DEC 50 5 3 2 Current control and open loop speed control October 2008 Edition Doc No 544910 06 subject to change maxon motor control 5...

Page 6: ...ntinuous max 5 A acceleration short time max 10 A The required voltage can be calculated as follows Known values Operating torque MB mNm Operating speed nB rpm Nominal motor voltage UN V Motor no load...

Page 7: ...noises the se lected amplification is too high Switch S2 must be set at ON Digital current control 1 Adjust potentiometer P1 Speed 1 to required speed limit Maximum speed in the 500 25 000 rpm range...

Page 8: ...speed see chapter 7 Speed Ranges 5 1 2 Disable Disabling or blocking the power stage If the input is not wired or the applied voltage is greater than 2 4 V the amplifier is activated A speed ramp will...

Page 9: ...the limitations described in chapter 5 1 5 Brake function must be observed or the amplifier may be damaged 5 1 4 Ramp function The ramp function enables the motor speed to have a controlled run up whe...

Page 10: ...ction 50 50 V Max brake current 30 A Delay time approx 12 ms Brake inactive Input open or input voltage 2 4 V Brake active Set input to Gnd or input voltage 0 8 V The maximum permitted brake speed is...

Page 11: ...with potentiometer Speed 1 Input open or input voltage 4 0 V Speed setting with potentiometer Speed 2 Set input to Gnd or input voltage 1 0 V 5 1 7 Hall sensor 1 Hall sensor 2 Hall sensor 3 Hall senso...

Page 12: ...rpm 500 120 000 rpm 125 30 000 rpm 67 15 000 rpm Note Independent of the position of the switches S5 and S6 the maximum speed can with the help of P1 Speed be adjusted only in the range 500 25 000 rp...

Page 13: ...ion of poten tiometers Set value with in ternal potentiome ter P1 Set value with ex ternal potentiome ter With external set value 0 5 V With 2 different speeds Set value with ex ternal potentiome ter...

Page 14: ...sensors not connected or incorrectly connected Intermittent Hall sensor supply lines Excessive interference to Hall sensor supply lines Solution change supply line feeds use shielded cable Faulty Hal...

Page 15: ...esis tive connection Use separate cable Hall sensor cable 30 cm Shielded cable highly recommended Connect shielding on both sides DEC 50 5 side Bottom of housing Motor side Motor housing or with motor...

Page 16: ...Disable Direction Brake Speed AUX V Hall CC Gnd V 10 50V CC Power Ground Motor winding 1 Motor winding 2 Motor winding 3 7 12V 7A 5V 5V 5V P1 Speed 1 P2 Speed 2 Ramp P3 Imax 7 12V 8 Bit Micro Controll...

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