Traverse assembly consists of Traverse Unit, Shaft, Support brackets with bearing, Reversal End Limits, Steady Rail and Guide Assemblies. Traverse assembly is supplied as per customer requirement of shaft length and guide assemblies
Minimum shaft length required between the side end brackets.
L = Max traverse stroke required + L 1
(Refer Table 2 for dimension L 1 for the model used )
Max Traverse stroke length is restricted only by max permissible shaft sag (Fig 6 )and availability of shaft.
Minimum Traverse stroke length is equal to the diameter of the shaft used. No restriction of Minimum stroke length for traverse units with pneumatically operated reversal mechanism .
Shaft used should be hardened and hard chrome plated Or Case hardened / induction hardened and ground .Recommended specifications . Hardness above 45 HRC. Diameter tolerance g6, Roughness Ra 0.7-0.8um, Roundness .005mm . minimum depth of hardness 1 mm, straightness 0.03 - 0.05/1000mm, Material C45 / EN 19 , Chrome plating thickness .02-.025mm.
2. Reversal End Limits:
Reversal end limits are provided for varying traverse stroke length . The reversal is instantaneous and automatic. On making contact with end limit , the torsion spring on the reversal mechanism gets charged, trigger and force the reversal once the throw over position is reached. The reversal time is pitch related (see fig 4 ). Consequently, as the pitch is increased, there is a very slight increase in traverse stroke length and decrease when the pitch is reduced.
3. Side Brackets:
Side brackets supports the shaft on bearings . Steady rail reversal end limits.
4. Steady Rail:
Provided to guide the traverse unit and prevents rotation of traverse unit on the shaft.. Two guide bearings provided on the traverse unit rolls over the steady rail . Width of rail Dimension “J �?Ref Table 2. Tolerance on width -0.01 t0 0.05 . Width of rail should be uniform throughout the length and straight. Guide rail need to be mounted parallel to the traverse shaft.
5. Guide assemblies:
Guide assembly can be mounted on top mounting surface of Traverse unit. Refer dimension N ,Table 2 for insertion depth of mounting screws. Excess length bolt will cause difference in linear speed and malfunctioning of traverse unit.
The weight of guide assemblies mounted directly on the Traverse unit should be reduced to minimum possible to maintain accuracy at reversal points.
When heavy guide assemblies are to be used or when the tension / twisting forces in the material to be traversed is large or when there is large overhang for the guide assembly, a load carrier is recommended for mounting the guide assembly.
Separately Carried additional loads.
- Bearing Mounted: 4 no bearing fitted on to a separate top mounting plate assembly used in conjunction with a steady bar prevents the rotation of the unit on the shaft and also take care of twisting forces. Used for moderate loads and twisting forces.
- Linear Bearings and guide rods: Guide assembly mounted on a load carrier with linear bearings and supported on two no guide shafts.
6. Shaft Cover :
- LM Guide System : Guide assembly mounted on a load carrier with LM Blocks and rail . This system is very effective in traversing very heavy loads and also used in application where spool is to be traversed.
Bellow type cover recommended in extremely dusty and corrosive environment. Non inflammable bellows are used in metal spraying applications.
Sliding cover mounted between end plates can also be used to prevent dust accumulating on shaft.
7. Tapered winding: For tapered winding / Winding on Conical , Bi �?Conical spools self-adjusting end stops are provided. End limit position is altered during winding as required using small motor and PLC.
Traverse Assembly tailor made for any application of can be offered.