Test Operation - Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual

8.3 Test operation

The motor and machine are directly connected, and the machine break-in and control statuses are
checked.
(1) Do the command speed and actual speed match?
→ If they do not match:
1) Check whether the spindle parameters (SP000 to SP384) are set correctly.
Especially check whether the following parameters are set correctly:
① SP017 (TSP)
② SP034 (SFNC2)
③ SP040 (MTYP)
④ SP257 ~ SP384
2) Check whether the following spindle NC parameters are set correctly:
① slimit1 ~ 4
② Smax1 ~ 4
③ Smini
(2) Is the rotation smooth?
(3) Is there any abnormal noise?
(4) Is there any abnormal smell?
(5) Is the bearing temperature abnormally high?
If the operation is normal, next operate the motor with an actual load and check for abnormalities.
< Reference >
Speed adjustment
Because the speed command is a digital signal via a bus line connection, there is no drift,
offset, etc.
Thus, the speed does not need adjusting. However, when the spindle speed must be adjusted
to allow for deviation such as pulley diameter, adjust using the following method.
(1) Setting Slimit
Slimit
= (Max. motor speed (rpm) set in TSP ) × (deceleration ratio between the motor and
spindle)
(Example) When TSP is 6000rpm, and the speed change ratio is 1/2:
(2) Set the speed command to 1/2 the max. spindle speed, and measure the spindle speed.
If the speed does not match the specified speed, adjust the speed to match the specified
speed by raising/lowering the parameter Slimit . (Compensate for accuracy errors such as
pulleys, etc.)
(3) Set the S command to the max. spindle speed, and check that the spindle speed matches the
commanded speed.
If the max. spindle speed is not reached (the motor stays at the max. speed set in #31 TSP ),
readjust from step (2) after changing #31 TSP .
(4) For gear changeover machines, adjust the speed with steps (1) and (2) above after changing
gears.
Set the optimum value for Slimit and Smax of each gear stage.
8. Adjustment Procedure
Slimit = 6000 × 1/2 = 3000.
So 3000 is set as the Slimit.
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