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drylin® T - Mounting Version - Horizontal

1st Step:

Select the mounting version:

1 rail and 1 carriage

1 rail and 2 carriages

2 rails and 4 carriages

2nd Step:

Check to see whether the maximum clearances of the applied forces are within the permissible values (see maximum permissible clearances, right).

Maximum permitted clearances:

Option: 1 rail, 1 carriage
sy + sz < 2 Lx - Y0
ay + az < 2 Lx - Y0
sy < 5 Zm
sz < 5 Zm

3rd Step:

Calculate the necessary driving force

3.1

Center of gravity in x- and z-direction inside the carriage(s)

3.2

Center of gravity in z direction outsideof the carriage(s)

3.3

Center of gravity in x direction outside of the carriage(s)

If the position of the center of gravity is not specified: Fa = MAX (Fa1, Fa2, Fa3)



4th Step:

Calculate the maximum bearing load

4.1

Maximum bearing load in y direction

4.2

Maximum bearing load in z direction


Variables in the calculation:

Fa: Driving power [lbs]
Fs: Mass force [lbs]
Fy, Fz: Bearing load in y- or z-direction [lbs]
sx, sy, sz: Clearance of the mass force
in x-, y- or z-direction
[mm]
ay, az: Clearance of the driving power
in y- or z-direction
[mm]
wx: Clearance of the carriage on a rail [mm]
LX: Constant based on the installation size [mm]
Zm: Constant based on the installation size [mm]
Y0: Constant based on the installation size [mm]
b: Clearance of the guide rails [mm]
µ: Coefficient of friction,
µ = 0 in static loads,
µ = 0.2 in dynamic loads
 
ZW: Number of carriages per rail  


The constant values:

Order no. LX ZM Y0
  [mm] [mm] [mm]
TW-01-15 29 16 11.5
TW-01-20 35 23 15.0
TW-01-25 41 25 19.0
TW-01-30 49 29 21.5


Coefficients:

  1 rail,
1 carriages
K1 |(ay+Y0)/Lx|
K2 (sy+Y0)/Lx
K3 |az/Lx|
K4 |sx/Lx|
K5 sz/Lx
K6 |(sy+Y0)/Zm|
K7 |sz/Zm|

5th Step:

Check calculated load for both y and z with the Maximum Permissible Load table for Fymax and Fzmax (right). This table illustrates the maximum permissible load on a single gliding element from the DryLin T carriage. Evaluating the maximum load on a single gliding element establishes a safety factor for the linear system.

Maximum permitted load:


[lbs
Order no. Fymax, Fzmax[N]
TW-01-15 450
TW-01-20 830
TW-01-25 1125
TW-01-30 1575

6th Step:

Determine the maximum permissible speed for the calculated load from Step No. 4

Diagram for the determination of the maximum permitted speed for the determined bearing load