Yaskawa Sigma II Indexer - Manual (Page 87)

Sigma II Indexer User’s Manual Setting up the Reference Units
5-32
Ball Screws
Circular Tables
Belts and Pulleys
5.5.2 Setting Speed [x1000 Reference Units / min.]
The Sigma II Indexer stores all speed data in units of [X1000 Reference Units/min.]
•
Determine load (workpiece) speed in terms of 1,000 reference units per minute.
Example:
Reference Unit = 0.01 mm
Desired speed is 15 m/min.:
15,000 mm /min.
= 1,500,000 reference units / min.
0.01mm
Speed = 1,500 [x 1000 reference units / min.]
Preset
Values
Pn202 8192
Pn203 24000
Preset
Values
Pn202 24576
Pn203 3600
Preset
Values
Pn202 20,480
Pn203 1,309
Electronic gear ratio = = =
B
A
----
© ¹
§ · Pn202
Pn203
Travel distance per load shaft revolution = = 24000 ref units
2048 u 4 u 1
24000 x 1
0.24in.
0.00001in.
Electronic gear ratio = = =
B
A
----
© ¹
§ ·
Pn202
Pn203
Travel distance per load shaft revolution = = 3600 ref units
2048 u 4 u 3
3600 x 1
360°
0.1°
Load Shaft
Reference unit: 0.1°
Electronic gear ratio = = =
B
A
----
© ¹
§ ·
Pn202
Pn203
Travel distance per load shaft revolution = = 12,566.37 ref. units
16,384 u 4 u 3
12566.37
3.14 u 4 in.
0.0010in.
= =
196,608
12566.37
20,480
1,309
Reference unit: 0.0010in.
Load shaft
16-bit absolute encoder
Gear
ratio: 3:1 Pulley diameter )4 in