Minarik MM21036A Manuale utente
1MM21036A/MM22036A INSTALLATION GUIDE
Minarik Electric Company Glendale, CA 91201
Masters of Control
Installation and Connection Guide
Models MM21036A and MM22036A
Speed Controls for Dancer Pot Applications
These controls are designed for applications that call for dancer
pot control. They feature electronic adjustment of offset and
span, to replace the cumbersome linkage adjustment common
to installations of this type.
Specifications
Drive MM21036A MM22036A
Line voltage (-5% + 10%) 115 VAC 230 VAC
Line frequency 50/60 Hz 50/60 Hz
Line current, maximum 8A 8A
Horsepower 1/8-1/2* 1/2-1**
Armature output 0-90 VDC 0-180 VDC
Armature current, maximum 5 ADC* 5 ADC**
Ambient temperature range 10° C - 55° C 10° C - 55° C
Approximate weight 0.5 lb 0.5 lb
* Maximum horsepower = 1 and maximum armature current = 10A
when mounted on a suitable heatsink, e.g., Minarik Kit Number
223-0156.
** Maximum horsepower = 2 and maximum armature current = 10A
when mounted on a suitable heatsink, e.g., Minarik Kit Number
223-0156.
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 1
Warning
The field output is for shunt wound motors only. Do not
make any connections to F1 and F2 when using a
permanent magnet motor.
Use 18 AWG wire to connect the field output to a shunt wound
motor. Connect the motor field to terminals F1 and F2.
Wiring instructions
Refer to Figure 1 (page 3) for an illustration of all connections.
Motor connections
Connect the motor armature to Terminals A1 and A2. If using
a shunt-wound field motor, connect the field to Terminals Fl
and F2; otherwise, make no connections to Terminals Fl and
F2.
Dancer potentiometer connections
Connect the dancer pot CCW end to terminal Sl, its wiper to
S2, and its CW end to S3. Use shielded cable unless the pot
leads are less than 18 inches (0.5m) long.
Power and line fusing connections
Connect line power to Terminals L1 and L2. Fuse the live AC
leg(s) with fuse(s) sized at least 150% of the motor rating. Do
not add a line fuse to L2 unless the line voltage is 230 VAC.
Field output connections
2MM21036A/MM22036A INSTALLATION GUIDE
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3MM21036A/MM22036A INSTALLATION GUIDE
Figure 1. MM21036A/MM22036A Connections
NOTES
1. DO NOT CONNECT FIELD OUTPUT IF USING A PERMANENT MAGNET
MOTOR.
2. DO NOT ADD A LINE FUSE TO L2 UNLESS LINE VOLTAGE IS 230 VAC.
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 3
4MM21036A/MM22036A INSTALLATION GUIDE
Figure 2. Calibration Trimpot Layout
Calibration
The control is factory calibrated with OFFSET at 0° and SPAN
at 300°. The MAX SPD trimpot is adjusted to 85V DC
(MM21036A) and 170V DC (MM22036A), at no load.
Calibrate the drive using the following procedure:
1. Set the MIN SPD and OFFSET trimpots to zero (full
CCW).
2. Set the SPAN, MAX SPD and TORQUE trimpots to
maximum (full CW).
3. Set the IR COMP trimpot to midrange (approximate 12
o’clock position).
4. Set the dancer potentiometer wiper to minimum.
5. Apply power to the drive.
6. Calibrate the trimpots as follows:
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 4
5MM21036A/MM22036A INSTALLATION GUIDE
OFFSET
OFFSET sets the dancer pot wiper position at which the motor
begins to run. This is expressed as the angle of the wiper
relative to its fully CCW position. With these controls, the of-
fset of the wiper may be set as high as 290° before the motor
will run. To calibrate OFFSET:
1. Set the dancer wiper to the desired offset position.
2. Apply line voltage.
3. Adjust the OFFSET trimpot until the motor shaft just
begins to rotate. Back off the adjustment slightly until the
motor has stopped rotating.
MINIMUM SPEED (MIN SPD)
The MIN SPD setting determines the motor speed at the point
when the OFFSET trimpot allows the motor to run. It is factory
set for zero rated speed.
To calibrate, set the MIN SPD trimpot full CCW. Set the
dancer potentiometer to the point where the motor just begins
to rotate. Adjust the MIN SPD trimpot until the desired
minimum motor speed is reached.
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 5
SPAN
SPAN is the angle through which the dancer pot wiper must
rotate to cover the full speed range that the application requires.
The motor will not increase speed at any setting past this angle.
The minimum span of the wiper to obtain rated output from
these controls is 10°. To adjust SPAN:
1. Set the dancer wiper to the desired maximum position.
2. Adjust the SPAN trimpot until the desired maximum
motor speed has been reached.
MAXIMUM SPEED (MAX SPD)
The MAX SPD setting determines the motor speed when the
dancer potentiometer wiper is at the maximum cutoff point set
by the SPAN trimpot. It is factory set for maximum rated
speed.
To calibrate, set the MAX SPD trimpot to maximum (full CW).
Set the dancer potentiometer wiper to maximum. Adjust the
MAX SPD trimpot CCW until the desired maximum motor
speed is reached.
REGULATION (IR COMP)
The IR COMP trimpot setting determines the degree to which
motor speed is held constant as the motor load changes. It is
factory set for optimum motor regulation.
6MM21036A/MM22036A INSTALLATION GUIDE
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 6
To calibrate IR COMP (exact calibration):
1. Turn the IR COMP trimpot full CCW.
2. Set the dancer potentiometer until the motor runs at
midspeed without load (for example, 900 RPM for an
1800 RPM motor) A hand held tachometer may be used to
measure motor speed.
3. Load the motor armature to its full load armature current
rating. The motor should slow down.
4. While keeping the load on the motor, rotate the IR COMP
trimpot until the motor runs at the speed measured in step
2.
Approximate calibration:
If the motor does not maintain set speed as the load changes,
gradually rotate the IR COMP trimpot CW. If the motor
oscillates (overcompensation), the IR COMP trimpot may be
set too high (CW). Turn the IR COMP trimpot CCW to
stabilize the motor speed.
7MM21036A/MM22036A INSTALLATION GUIDE
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 7
8MM21036A/MM22036A INSTALLATION GUIDE
The TORQUE setting determines the maximum torque for
accelerating and driving the motor. TORQUE is factory set at
120% of maximum drive current. You must recalibrate the
TORQUE setting if using a lower current rated motor.
1. With no power applied to the drive, connect a DC
ammeter in series with the motor armature.
2. Set the TORQUE trimpot to full CCW.
3. Carefully lock the motor armature. Ensure that the motor
is firmly mounted.
4. Apply line power. The motor should be stopped.
5. Set the dancer potentiometer to maximum speed. The
motor should remain stopped.
6. Slowly rotate the TORQUE trimpot clockwise (CW) until
the ammeter reads 120% of maximum motor armature
current.
Warning
Although TORQUE is set to 120% of maximum drive
current rating, continuous operation beyond that rating
may damage the motor. If you intend to operate beyond
the rating, contact your Minarik representative for
assistance.
TORQUE LIMIT (TORQUE)
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 8
7. Set the dancer potentiometer to the OFFSET position.
8. Remove power from the drive.
9. Remove the lock from the motor shaft.
10. Remove the ammeter in series with the motor armature.
The control is now calibrated.
9MM21036A/MM22036A INSTALLATION GUIDE
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 9
Notes
10 MM21036A/MM22036A INSTALLATION GUIDE
250-0103r2_readers_spreads.qxd 7/18/01 3:22 PM Page 10
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