Rev 8, Dated 27-2-2018
9
Fig 4. SPEED SENSOR
Problem
2.
No Speed (Conveyor belt is not moving at all)
Check Points/Solution
1. Run test treadmill program (Refer procedure 12) and click
appropriate buttons for speed increase and decrease.
2.
Observe the speed increase/ decrease LEDs on back panel of the
STWIN amplifier (Refer fig 2).If LEDs are glowing, then the
problem lies in TPC cable or in treadmill.
3.
But if the LEDs are not glowing then the problem lies with
STWIN amplifier or calibration factors are incorrect.
4.
Check TPC cable continuity, if needed cut both ends and resolder
the cable (Refer fig 13 for
Cable Details
).
5.
If belt is not moving while testing the treadmill independently
then the problem probably lies on the treadmill side. First check
whether the speed indication feedback LED (Fig 9) is glowing on
AC/DC drive.
6.
If it is not glowing, then ensure that 230-volt ac is reaching ac
mains connector on AC/DC card. If 230 volt is present and still
no speed, then change ac/dc drive.
7.
The last step is to change the dc motor. But before changing do
the following cold test.
8.
Cold test for dc motor:
a. Remove 3-pin top of treadmill from mains supply.
b. Remove all the two wires of dc motor.
c. Ensure that there is no continuity between treadmill body and
all connectors of dc motor.
d. In case of pmdc motor, ensure that the armature resistance is
nearly equal to 2-3 ohms.
Material
Req.
ST win amplifier,AC/DC combined card, silicon oil(200ml).
MAGNET IS
EMBEDDED IN
THE FLYWHEEL
SPEED SENSOR
DC
MOTOR
