Prerequisite: The toothed belt fitted with clamping sleeves [31] and [4] mounted
but not yet tensioned.
è
5.2 Mounting the toothed belt.
Fig. 14 Fasten counter bearing
1. Push the needle bush [G] onto the trunnion [F] of the clamping sleeve [31]
avoiding tension.
2. Fasten the counter bearing [32] with the screw [33] on the thread [H].
3. Tension toothed belt [5].
With EAMM-U-110/-145: Fasten counter bearing [32] with 2 screws [33].
5.4
Tensioning the toothed belt
NOTICE!
Toothed belt pretensioning too high.
Impermissible radial loads or shaft break.
Increased wear of the toothed belt and the bearings of axis and motor.
•
Avoid excessive toothed belt pretension.
A low toothed belt pretension is recommended.
The toothed belt [5] is tensioned when the strands [D] run approximately parallel:
–
Untensioned: y
>
x
–
Tensioned: y
L
1 … 1.05 x
Fig. 15 Strands of the toothed belt
With EAMM-U-50/-60/-70/-86
1. Move the motor until the clamping force F
V
is exerted on the toothed belt [5].
2. Tighten [2] screws.
EAMM-U-
Clamping force F
V
[N]
50
15 … 35
60
40 … 70
70
60 … 110
86
70 … 130
Tab. 3 Permissible clamping force of the toothed belt
With EAMM-U-110/-145
Fig. 16 Tension toothed belt with clamping element
1. Position clamping element [61] in the drilled hole [E].
2. Turn clamping element [61]. Hex wrench:
ß
8
Observe the recommended torque.
Ä
The motor, which can be moved along the slots, is pressed away from the
axis mechanism by the eccentric cam of the clamping element.
3. Tighten [2] screws.
EAMM-U-
Recommended torque
[Nm]
110
0.2 … 0.6
0.4 … 0.8
0.6 … 1.0
145
1.0 … 1.5
1.5 … 2.0
2.0 … 2.5
Tab. 4 Recommended torque of the clamping element
EAMM-U-
Clamping force F
V
[N]
110
120 … 300
145
200 … 450
Tab. 5 Permissible clamping force of the toothed belt
Fig. 17 Close drilled hole
•
Press the sealing plug [50] into the drilled hole [E].
5.5
Mounting the cover
Fig. 18 Attach the cover
•
Fasten cover [7] to the housing [8] with the screws [1].
The threads [I] are used to fasten mounting accessories
è
www.festo.com/catalogue.
6
In operation
CAUTION!
Risk of injury from touching hot surfaces.
The motor connecting kit becomes hot due to the heat dissipation of the motor.
•
Do not touch the motor connecting kit during operation or immediately after-
ward.
WARNING!
Risk of injury due to unexpected movement of components if toothed belt fails.
•
Take supplemental safeguarding measures.
7
Maintenance
7.1
Check the toothed belt
The toothed belt [5] is a wearing part
è
1. Check toothed belt [5] regularly:
–
during maintenance of the machine
–
when replacing an axis
2. Replace the toothed belt [5] at the following indicators of wear:
–
excessive accumulation of wear particles in the housing
–
cracks on the back of the toothed belt
–
visible glass fibre cords in the tooth base