|
Torque Transducer
FAQ |
|
Below is a list of frequently asked questions regarding the
operation of our torque transducers. Should you need further
assistance, contact Magtrol or your local sales agent. |
|
Click on the question for the answer: |
|
|
|
Q |
What
is the largest torque sensor Magtrol can supply? |
A |
Due to our extended competencies
in torque sensor design, Magtrol can supply a torque sensor
having a rating of up to 150,000 N·m (1327613 lb·ft)! For ratings higher than 150,000 N·m contact Magtrol. |
|
|
Q |
Do you have a brake
or actuator which is usable as a load for the TMHS series
transducer? |
A |
With maximum speeds up
to 70,000 rpm, the high-speed version (-HS) of Magtrol's
Eddy-current Dynamometers are well suited for this purpose.
View speed
and torque ratings here to select a WB Dynamometer
for your torque loading needs. |
|
|
Q |
How do I select the
right couplings, especially for high-speed applications? |
A |
The higher the speed of the application, the more care
is required in selecting the coupling(s). Quality, high-speed
couplings are VERY expensivebeware of "sticker
shock"! However, this is not one place to cut costs
since a substandard coupling can effect the entire drive
train configuration (see next question). Every
element of the drive train assembly must be meticulously
aligned and balanced and the couplings are a fundamental
component.
To complement your torque transducer or dynamometer,
Magtrol can provide you with a dedicated coupling for
your application. Simply contact Magtrol with your application
details, maximum torque, maximum speed and shaft dimensions
of the motor (drive) and load. |
|
|
Q |
I have noticed that my torque transducer sometimes
starts and stops in the middle of a test. Then, after
several cycles, the coupling slips off the torque axis.
I can re-tighten it but the coupling still ends up damaging
the axis. What is causing this? |
A |
In this situation, it
sounds like a (cheap) poor quality coupling is being used.
In such case, the solution is to use a keyed shaft. |
|
|
Q |
What is the difference
in coupling selection between TM floating (suspended)
mounting and TM fixed (supported) mounting? |
A |
For high-speed applications, fixed/supporting mounting
is mandatory! In all supported installations, double-element
or metal bellows couplings are recommended.
For safety reasons, suspended mounting should only
be used for low-speed applications. Single-element couplings
(selected in relation to torque, speed and transducer
weight) are then employed to create a shorter drive
train. Bellows couplings and double-element couplings
are not suited for suspended (floating) installations.
|
|
|
Q |
What is the best way to precisely align the shafts
of the TM transducer with the shafts of the units to
be tested (especially at speeds > 15,000 rpm)? |
A |
Laser aligning systems
are the best method. If one is not available, use a dial
gauge. If your system has a precision XYZ stage, run your
system "no load" and adjust each axis until you reach
the highest speed in the display. The system is best aligned
at the highest speed. |
|
|
Q |
How should the coupling(s)
be centered on the FTM Flangesan option for transducers
with splined shaft ends? |
A |
The transducers have cylindrical centering seats on
each side of the splined shaft. Use only the centering
seats for centering, not the splined part. When a TMHS
(high-speed) Transducer is ordered with flanges, Magtrol
will balance the flanges on the shaft and note the angular
position (of the flange to the shaft). |
|
|
Q |
Can the TM be mounted
in a vertical installation? |
A |
Vertical mounting is not a problem provided there is
no weight suspended from, or supported by, the torque
transducer. The transducer itself should be supportedthe
foot mount is recommendedotherwise, the total
weight of the TM body will be hanging on its bearings.
When assembling, take special care to avoid any stress
on the bearings and make sure the couplings are free
of any axial load prior to tightening.
|
|
|
Q |
What is the total bandwidth
of the complete measuring shaft line (TM + couplings)? |
A |
The measuring bandwidth
is determined by the filter cutoff of the low pass filter
(1 Hz to 5 kHz). In addition to this electronic filtering,
there is a mechanical filtering of the driving line (motor
shaft, coupling(s), torque transducer and load shaft).
This mechanical bandwidth can be lower than the low pass
filter setting. |
|
|
Q |
What happens if there
is vibration in a suspended installation? |
A |
If a suspended (floating)
TM transducer is submitted to vibration >> STOP
!! Check the mounting, coupling, alignment and balancing.
If you can not get rid of the vibration, change the installation. |
|
|
Q |
What is the maximum
admissible vibration level (mm/s RMS) of each torque transducer? |
A |
Magtrol's TM Transducers
have been tested on a shaker table with a vibration level
of 5 g's.
(1 g = 9806 mm/s²) |
|
|
Q |
Can I get a speed signal from the TM series Torque Transducer with out using a 3410 or 6400 Torque Display? |
A |
The speed signal on the TM Torque Transducer is an open collector configuration. You may need a pull-up resistor. Refer to the manual. |
|
|
Q |
Can I calibrate the TM series or TF series Torque Transducers myself? |
A |
No, it must be returned to Magtrol. |
|
|
Q |
What is the certification level of the Magtrol Torque Calibration Laboratory? |
A |
All instruments in use at Magtrol are periodically checked by a certified laboratory (linked to National Standards).
Weights used on the calibration benches are certified by Metas (Swiss National Certification Lab).
Metas or DKD calibration certificates are available at an additional charge.
|
|
|
Q |
I am searching for information on my Vibro-Meter Torque Sensor. This Product range has been taken over by Magtrol SA, but I am unable to find the information I am looking for. Do you still sell this equipment? |
A |
Magtrol continuously develops new products in order to meet our customers' growing testing requirements. The older model you are searching for was probably replaced by a newer model (see the table below) which offers more features and employs the latest technologies. If you need further information on older/obsolete equipment, you can search our archived product manuals or contact your Magtrol sales representative.
Vibro-Meter Torque Transducer |
Magtrol Replacement Model |
TG-0.2/BP TG-0.5/BP TG-1/BP |
TM 301 to TM 307 |
TG-2/BP TG-5/BP TG-10/BP |
TM 308 to TM 311 |
TG-20/BP TG-50/BP |
TM 312 and TM 313 |
TG-100/BP |
TM 314 |
TG-200/BP |
TM 315 |
TG-500B/P |
TM 316 |
TG-1000/BP |
TM 317 |
TG-2000/BP |
TF 218 |
TG-3000/BP TG-5000/BP |
TF 219 |
TE 106/M3 |
TM 308 or TM 309 |
TE 107/M3 |
TM 310 |
TE 108/M3 |
TM 311 |
TE 109/M3 |
TM 312 |
TE 110/M3 |
TM 313 |
TE 111/M3 |
TM 314 |
|
|
|
|
Back to top |
|