Specifications

Applications Ver. 0002 AP - 7
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MS f PROGAIN,FFGAIN...
mV
SP21
SP20
(motor rpm)
=⋅
1244 4 3444
AP.1.1.2.3 On spindle drives in closed loop, M19 or Rigid Tapping.
The CNC indicates to the drive, through the Sercos ring, the desired motor speed (MS) which
is calculated in a way similar to that of the axis drive.
To properly set the drive, proceed as follows:
At the Drive:
- Set parameters SP20 -F00031- and SP21 -F00081- with the maximum motor speed
value for this application and 9500 millivolts respectively.
- Set parameters NP121, NP122 and NP123 according to the gear ratios installed.
At the CNC 50/55:
- Set the MAXGEARn parameters of the CNC 50/55 with the maximum tool speed value
for that gear "n".
- Set the MAXVOLTn parameters according to the equation shown in the previous
section.
And:
At the CNC 50/55:
- The constants PROGAIN, DERGAIN, etc. must also be set. For example:
Two CNC 50/55 parameters:
REFEED1 (P034) = Maximum angular speed in M19 (°/min).
REFEED2 (P035) = Maximum angular speed of the tool when searching
home in M19.
and two concepts similar to MaxGear and MaxVolt used earlier:
MG_M19 = Maximum tool turning speed in M19 (rpm).
MV_M19 = Analog voltage for REFEED1 (mV).
Hence, PROGAIN is calculated as follows:
and where:
EdS (mm) = Following error at a speed of REFEED1.
Kv is a constant indicating the ratio between REFEED1 and the EdS, Thus:
for Kv=1 the EdS will be 1° for a speed of 1000 °/min.
for Kv=2 the EdS will be 0.5° for a speed of 1000 °/min.
The next page shows an example.
PROGAIN
MV_M19
EdS
MV_ M19 Kv 1000
REFEED1
(mV/ )
where:
MV_ M19 =
MAXVOLT1
MAXGEAR1
REFEED1
360
(mV)
and
REFEED1 = MG_M19 360 ( /min)
==
⋅⋅
°
⋅
⋅°