Haas VF-1 - Page 276

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PARAMETERS
June 1999
96-8000
Parameter 46 A I GAIN
See Parameter 4 for description.
Parameter 47 A RATIO (STEPS/UNIT)
This parameter defines the number of encoder steps required to complete one full rotation of
the platter. For example an HRT 210 with a 90:1 gear ratio, a final drive ratio of 2:1, and an
encoder count of 2000 lines would be:
2000 x 4 x (90 x 2) / 360 = 2000 steps
for a brushless HRT 210 with a 90:1 gear ratio, a final drive ratio of 2:1 and an encoder count of
8192 the formula would be:
8192 x 4 x (90 x 2) / 360 = 16384 steps
If for example 16384 ended up being 13107.2 (non integer) the user must make sure the single
bits SCALE FACT/X and the COMBINATION OF SCALE/X LO and SCALE/X HI are turned on
in parameter 43. When the scale factor/x bit is 1 the scale ratio is interpreted as divide by X:
where X depends on scale/ x lo and scale/ x hi (see parameter 1 for scale/ x lo and scale x hi
values). For example:
8192 x 4 x (72 x 2) / 360 = 13107.2
You would then turn on the scale fact/x bit and the scale/ x lo bit which would give you a factor
of 5 thus:
13107.2 x 5 = 65536 encoder steps
Parameter 48 A MAX TRAVEL (STEPS)
See Parameter 6 for description. Normally this parameter would not apply to the A axis,
however this parameter is used on mills with a gimbaled spindle (VR-Series mills). On a VR-
series mill this parameter is used to limit the amount of angular movement of the spindle (A
and B axes). The A and B axes are limited in movement to a distance between negative MAX
TRAVEL, and positive TOOL CHANGE OFFSET. On VR-Series mills A and B axes ROT TRVL
LIM must be set to 1, MAX TRAVEL and TOOL CHANGE OFFSET must be calibrated and set
correctly.
Parameter 49 A ACCELERATION
See Parameter 7 for description.
Parameter 50 A MAX SPEED
See Parameter 8 for description.
Parameter 51 A MAX ERROR
See Parameter 9 for description.
Parameter 52 A FUSE LEVEL
See Parameter 10 for description.
Parameter 53 A BACK EMF
See Parameter 11 for description.
Parameter 54 A STEPS/REVOLUTION
See Parameter 12 for description
Parameter 55 A BACKLASH
See Parameter 13 for description.