Zero-Max E, JK, Y, QX, ZX User Manual

Adjustable Speed Drives
How The Zero-Max® Drive Works
A Zero-Max Drive is a mechanical adjustable speed drive. Five sizes provide constant torque of 12 to 200 inch pounds throughout the speed range. The speed range is innitely variable from 0 to 1/4 of the input speed under full rated load. This is generally stated as 0-400 RPM assuming an input of 1800 RPM.
motors or they may be connected to any rotating power source up to 2000 RPM. Speed adjustments are easily made by moving a lever control through an arc or turning the handwheel of a screw type control. In either case, precise speed control settings are possible.
Over 1 million Zero-Max Drives have been put to work in a wide variety of applications. They are available from distributors in all major markets throughout the world.
Features ........................................... Benets
Compact ................................................ Easy to handle/compact
Simple to install ...................................... No special wiring/training
Simple operation .................................... Repeatable & easy to operate with lever or screw control
Use anywhere on machine ....................... Accepts input to 2,000 RPM. Ideal as a secondary drive
Constant torque ...................................... Delivers constant torque throughout the speed range
4:1 speed reduction ................................ Often usable without additional speed reduction
Change speed anytime ............................ Speed set-ups are made quickly and easily
Change speed frequently ......................... Permits slow or fast, small or large speed changes
Change speed continuously ..................... Ideal for dancer applications/constant speed changes
Leave at one setting ................................ No daily speed cycling
Accurate speed holding ........................... No “wear-in” period/constant speed operation
Accepts any input ................................... World’s most versatile, economical secondary drive
Goes to zero output ................................ Ideal for use as a clutch
Shaft/control/motor options ..................... Versatile
Innitely adjustable ................................. 0-400 RPM speed range with 1800 RPM input
1
Match the Zero-Max® Drive to These Components
To achieve the exact performance characteristics you desire, Zero-Max provides the following matching components:
For Model E and JK Drives, a right angle gearhead and selection of motors are available.
For models Y, QX and ZX Drives, C-Flange adapters are available for connecting customer supplied motors to the drive you have selected.
Unidirectional Drives
E Models 1, 2, 41 or 42
Torque Rating 12in. lbs. Speed Range 0-400. Normal Input 1/4-1/3 H.P.
JK Models 1, 2, 41 or 42
Torque Rating 25in. lbs. Speed Range 0-400. Normal Input 1/4-1/3 H.P.
Y Models 1, 2, 41, or 42
Torque Rating 60in. lbs. Speed Range 0-400. Normal Input 1/2 H.P.
Lever control is standard on all drives. Optional controls include: screw control, extended screw control, extended lever control, extended control shaft, microdial control, plus  atted and drilled control levers.
Direction of output rotation must be speci ed and is independent of input direction. Model numbers ending in “1” are CCW output, “2” are CW output and “3” are reversible.
QX Models 1, 2, 41 or 42
Torque Rating 100in. lbs. Speed Range 0-400. Normal Input 3/4 H.P.
ZX Models 1, 2, 41 or 42
Torque Rating 200in. lbs. Speed Range 0-400. Normal Input 1-1/2H.P.
Reversible Drives Gearhead Motors
E Model 3
Torque Rating 12in. lbs. Speed Range 400-0-400. Normal Input 1/4-1/3 H.P.
JK Model 3
Torque Rating 25in.lbs. Speed Range 400-0-400. Normal Input 1/4-1/3 H.P.
Y Model 3
Torque Rating 60in.lbs. Speed Range 0-400. Normal Input 1/2 H.P.
Right angle gearheads available for E and JK Models.
Right Angle - 4 Models
W1 4:1 W2 10:1
W3 20:1 W4 40:1
Many popular voltage, Hz, phase and enclosures are available for use with drive.
E Models 1, 2, 3/ JK Models 1, 2 and 3
C-Face Adapters
MODEL CFY*
Includes coupling for 56 frame motor
.
MODEL CFQ
Includes coupling for 56 frame motor.
MODEL CFZ
Includes coupling for 56 frame motor.
All C-Face Adapters will accept 56, 143T and 145T frame motors. *CFY adapter not compatible with Y3 reversible drive
2
STANDARD
6 O'CLOCK
Controls for Zero-Max® Drives
Standard Lever Type Control
The lever control can be removed from its customary 12 o’clock position and moved to a 6 or 9 o’clock position on E and JK Models and to any position on Y, QX and ZX Models that will not interfere with
the casebody or shaft. Flatted and drilled, as well as extended levers, are available for easy attachment to any kind of remote control, or for use on tension control applications.
C
Standard Lever
B
9 O'CLOCK
A
D
Lever Control Dimensions Lever Torque
Drive Model A B C D (Running, no load) (Not running, full load)
E 5.25 52° 2.50 1.00 7 in. lbs. 20 in. lbs.
JK 5.25 52° 2.50 1.00 7 in. lbs. 35 in. lbs.
Y 6.75 52° 3.25 1.68 15 in. lbs. 66 in. lbs.
QX 8.25 54° 3.55 1.90 36 in. lbs. 90 in. lbs.
ZX 10.00 63° 3.06 2.40 50 in. lbs. 160 in. lbs.
Optional Screw Type Control
All Zero-Max Drives are available
A
B
C
with screw control. Screw controls give very precise control of speed and many kinds of remote control attachments are easily made. They are positive and easy to calibrate. Kits are available for adding screw control to drives in the eld. The hand-wheel can be mounted on either end of the screw.
Drive Model A B C D E F
E__SC 1.50 2.12 6.06 0.37 3.75 0.18 38 2 in. lbs.
JK__SC 1.50 2.12 6.06 0.37 3.75 0.18 38 2 in. lbs.
Y__SC 1.50 2.25 7.42 0.44 4.58 0.18 50 3 in. lbs.
QX__SC 2.12 2.87 8.81 0.37 5.87 0.25 68 4 in. lbs.
ZX__SC 2.12 6.12 12.31 0.50 7.44 0.31 91 4 in. lbs.
SCREW CONTROL DIMENSIONS
3
D
F
E
Screw Control
Number
of Screw
Turns
Screw
Torque
(inch-Lbs.)
Controls for Zero-Max® Drives
Optional Microdial Type Control
Drive models E, JK, and Y are available with Microdial control. The Microdial is an enhanced Screw control that will provide the user with a numerical value that will correspond to a given speed setting. For added exibility, these units can be ordered with the Microdial counter on either end of the control. The Microdial is ideal for applications that require the speed setting to be adjusted often and need a high level of repeatability. Kits are available for adding the Microdial control to drives in the eld.
Microdial Control*
*LH (left hand) conguration shown
Numerical
G
C
Counter
H
E
I
Drive Model A C E G H I J
E__MD-__ 1.50 6.12 3.75 1.66 1.97 0.25 2.14 0-76
JK__MD-__ 1.50 6.12 3.75 1.66 1.97 0.25 2.14 0-76
Y__MD-__ 1.50 7.42 4.58 1.66 1.97 0.34 2.14 0-100
Type MD-LH
MICRODIAL DIMENSIONS
Drive Operating Characteristics
Input Speed should not exceed 2,000 RPM. There is no minimum, but as input speeds approach zero, slight variations in the angular velocity of the output may become noticeable. It is much better to use higher input speeds and take as much reduction as possible from the output shaft to maximize precise speed control. Direction of the input does not affect direction of output but does affect the speed range and performance of the Zero-Max Drive. The recommended input rotation direction in relation to output is given below. If output speeds are substantially in excess of rated speeds or if the drive is noisy or vibrating at top speed, the non­preferred direction input is probably being used. Try reversing the motor so the input is in the other direction.
Output Speed is innitely adjustable from 0 to 1/4th of the input speed. Speeds can be maintained or repeated with accuracy of 1% or less of maximum speed in the upper 90% of the range providing output load and input speed are constant.
Zero-Max Drives
Models vary in their ability to give absolute zero under light loads. All models go to zero output speed under full rated load.Output Torque ratings listed for various models are constant throughout the speed range and assume an input speed of 1800 RPM. The drives are designed for continuous duty running at one speed, a variety of speeds or continuous speed cycling. Additional output torque may be gained by lowering input speed. In general, the torque rating of all models may be increased 25% if the input speed is 900 RPM or lower.
Temperature A rise of 40° C above ambient may be expected in the drive assuming input speed of 1800 RPM. This temperature will generate surface heat too hot for continued skin contact. This does not indicate a malfunction nor does it affect the performance of the drive. The drives are built to withstand high operating temperatures but they should never exceed 90° C.
A
J
A
J
C
G
H
E
Type MD-RH
Numerical
Counter
Range
Thrust
Model
E & JK 20 12 25
*Note: At mid-point of Input and Output Shafts
Overhung Load Pounds
Output Input
Y 40 30 75
QX 50 40 100
ZX 400 100 400
W 400 500
*
Pounds
Load
Control Linearity
Movement of the Zero-Max speed control lever or rotation of the screw control produces a change in output speed that is non-linear. A typical speed-control curve of a Zero-Max Drive under full rated load is shown in the chart below.
100
80
60
40
20
At Full Rated Load
r--
r--
And
1800 RPM Input Speed
,,,
V
/
,....
~
~
0510 15 20 25 30 35 40 45 50
-
/
I/
/
4
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