Roland R4000 Manual page 19

B0059001 / Rev. 2.3
Available drives, possibilities and guidelines for setting the devices:
Clamping chuck
• ideal for all tube diameters
also for oily and greasy tubes
●
mandatory for positioning
●
accuracy better than + / - 8 °
access to at least one
●
end of the tube, a further
bearing for support
SND40 is set at drive type to
●
"constant rotation speed"
When selecting the drive motor follow the rules below:
1. Dimension the torque so that the tube reaches quickly the nominal speed
2. Servo motor is obligatory for positioning accuracy better than + /- 8 °
3. If no servo motor, use speed-controlled motor with precise brake
4. Without speed control: dimension the motor drive larger so that dependence on the speed
of the engine and transmission temperature is as low as possible
5. Without any speed or brake control, the positioning error can reach + /- 20 °
Note:
The stopping behaviour of the drive or the brake is adjusted with the parameter
"Position offset" at the SND40 so that the desired angular position can be achieved.
This assumes that the stopping behaviour is always constant because the SND40 has
no angle or rotary encoder information.
For drive units without brakes the temperature response of the machine can
dramatically affect stopping behaviour because changing of the transmission oil
viscosity or lubrication of rolling bearings.
Important:
Keep the rotation speed / speed / braking behaviour constant!
2.4.2 Mandrels inside the tube
Magnetic material, such as mandrels may disturb the measurement inside the tube sustainable so
that regular weld seam detection is not possible. In special cases, the usage of a mandrel is
possible. However, this is to clarify in the conception of a station for weld seam detection with the
application laboratory.
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
Weld Seam Detection System R4000 SND40
for Tubes, Cans and Drums
Cone drive
reasonably usable from
●
tube diameter > 20 mm
access to both ends of the
●
tube is necessary
not for positioning accuracy
●
better than +/-8°
SND40 is set at drive type to
●
"constant rotation speed"
Manual
Friction roller drive
• ends of tubes must not be
accessible
tube diameter at least > 15mm
●
separate clamping device necessary
●
higher maintenance because
●
cleaning and abrasion of the rollers
not suitable for oily and greasy tubes
●
not for positioning accuracy
●
better than +/-8°
SND40 is set at drive type to
●
"constant rotation speed"
System description
19