This page contains data for the Marldon Traverse range. If you wish to know more about Marldon and its Manufacturing Program, click Marldon.


Marldon Rolling Ring Traverse Units

Catalogue


1. How To Select

What you should know to select and order the right traverse for your application.

a. Side thrust required

b. Distance to be traversed

c. Rate of traverse (pitch) and Shaft Speed

d. Direction of Shaft Rotation


2. Product Data




1. Selection Criteria



a) Side Thrust required

Determine the side thrust required for your application and select the appropriate traverse unit from Table 1 below. The maximum side thrust in Newtons is given for each size of traverse unit under the column headed "Maximum Side Thrust N".


Table 1

MODEL Shaft
Diameter
(mm)
Maximum
Pitch
mm/rev
Maximum Side
Thrust 'N' at (notes)
Weight
Kg
100rpm 1000rpm
RT15 15 11 123 110 1.0
RT20 20 16 170 160 1.8
RT30 30 24 280 260 3.3
RT40 40 32 450 420 8


Your side thrust (F2) requirement, if used in a typical winding application, can be determined by using the following formula:

F2 = (C x F1) / (1.6 x B)


where :





F1(N) = Tension in the material to be wound, expressed in Newtons

F2(N) = Side thrust requirement

The side thrust requirement is directly related to the tension (F1) in the material to be wound.



Important notes on side thrust


a) It is important to estimate the side thrust required to ensure that the critical factors in your application are recognised. Often more side thrust is assumed to be necessary than is actually needed.

b) The stated side thrust in Table 1 is the value set in our factory for standard units. If a higher value is required it is possible in most circumstances to increase the power by a simple adjustment.

c) All Marldon units have 3 rings inside. Competitor companies often promote 4 ring units on the basis that 4 ring units offer significantly increased power. This is a fact. However it should be recognised that often this level of thrust is redundant and the true reason for the proposal is the greater stability on the shaft afforded by 4 ring units. Marldon 3 ring units are already stable, making a fourth ring unecessary.
d) You will note that side thrust is slightly increased at a lower rpm.


b) Distance to be Traversed

The maximum width to be traversed should be established. This is normally the inside distance between the reel flanges (dimension "C" above). This distance will be limited for any particular size of traverse unit to the extent that the shaft must not be so long that it would bend under the combined weight of the traverse unit and any other load (such as a pulley or guide roller assembly, or simply the weight of the material being wound) mounted upon it.


The chart below shows the acceptable combinations of shaft length and imposed load. If your application exceeds the unit's capability a secondary support should be used where the weight is supported on another mechanism and the traverse unit provides the reciprocating motion.


.


We offer complete assemblies to the standard dimensions shown below (Table 2) in section 6.

However, the frame length (A) and shaft extension for the drive (C) (both length of, and whether left-hand or right-hand) may be varied to your requirements on request at no additional charge.


c) Rate of Traverse (Pitch) and Shaft Speed

In most winding applications, for one revolution of the reel, the traverse needs to move a distance equal to the width of the material being wound. As the rate of traverse can be varied by moving the pitch lever, the decision needs to be made as to which pitch will be appropriate for the application, given that the speed of traverse is the result of the combination of the shaft speed and traverse pitch setting.

The maximum rate of traverse (pitch), expressed as the distance travelled in millimeters per revolution of the traverse shaft, is given in Table 1

The traverse shaft is normally driven by the reel shaft via a belt, and for best results the traverse shaft speed should be kept as low as possible and the traverse pitch set near maximum. In fact the optimum ratio of drive shaft speed to traverse shaft speed is calculated as:

( maximum pitch per revolution (per table 1) )
maximum product diameter x 1.1


d) Direction of Shaft Rotation

Rolling ring traverse units consist of moving components which, although manufactured to fine tolerances, still need fine tuning to make them reciprocate equally in both directions. This is done in our factory prior to despatch by means of an adjusting ring in the wall of the unit. In use, the traverse shaft will normally only rotate in one direction, pushing all slack in tolerances in one direction. The adjustment ring will remove this slack. However, if the traverse shaft is reversed the effectiveness of the fine tuning is diminished.

Consequently, it is necessary that the intended shaft rotation is notified to us at the time of order so that the correct setting can be made before despatch.

We describe the shaft rotation, when viewed looking at the pitch control scale, and with the tripping mechanism underneath, as:

"Top Toward" (TT) or "Top Away" (TA)


2) Product Data



a) Traverse Unit Only ("RT")




MODEL Dimensions (mm)
A B C D E F G H J K L M N O P R S
RT15 96 53 36 32 16 22
25
5 32 16 20 39 47 33 30 5 M5 8
RT20 126 70 70 40 19 33
37
6 40 19 32 54 62 44 41 6 M6 10
RT30 144 86 80 50 26 45
52
7 47 22 40 67 76 55 51 8 M6 10
RT40 204 112 160 68 32 63
70
8 59 26 50 76 91 67 66 9 M10 12




b) Complete Traverse Assembly ("RTA")




Table 2

MODEL Shaft
Dia
(mm)
Frame
Length
A
Effective
Traverse
B
Shaft
Extension
C
Standard Dimensions
D E F G H J K L M
RTA15 15 480 326 30 10 470 33 75 60 40 37 M6 15
RTA20 20 673 476 40 13 660 44 104 70 47 52 M10 15
RTA30 30 726 490 60 16 710 55 120 90 60 66 M12 15
RTA40 40 1160 820 80 20 1140 67 150 120 80 85 M16 25


We offer complete assemblies to the standard dimensions shown above. However, the frame length (A) and shaft extension (C) may be varied to your requirements on request at no additional charge.




Options & Accessories

Remote Pitch Adjustment: from a shaft extending through the side frame.

Remote stop Adjustment: from shafts extending through the side frames.

Reversible Shaft Operation: for reversal of drive shaft, automatic return stop compensation.

Roller Guides: that mount neatly on the traverse box are available in several sizes.







Home | Response Form | Contacts | Where We Are

Airwipes | Chalk (talc) Applicators | Flyer Payoffs | Cone Payoffs
Rolling Payoffs | Winding Machines | Press Tools | Metal Stampings