# Haas Parameter 47 A RATIO (Steps/Unit) – Haas Mill

Haas Parameter 47 A RATIO (Steps/Unit) – Haas Mill

Defines number of encoder steps required or one full platter rotation. 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 = 4000 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

Haas Parameter 47 A RATIO (Steps/Unit) – Haas Mill