MHT258a (Engl.)
11-1
11. APPENDIXES
11.1 Model type selection
(1) Load machine system
Load machine systems driven by adjustable (variable) speed motor are generally as follows.
Mechanical system
Description
Ball-screw (with direct coupling)
Used for high-accuracy positioning in a short dimension.
Ball-screw (with reduction gear)
Load torque is increased through deceleration. Compensation is required for gear backlash.
Rack and pinion
Used for positioning in a large dimension.
Movement per revolution of pinion involves a
π
value.
π
compensation is required.
Conveyor (with timing belt)
Used for light loads.
π
compensation is required.
Chain drive
Mostly used for transfer line, etc.
For positioning, countermeasures for chain elongation is needed.
Reduction ratio is large. Moving speed of load machine system is low.
Feed roll drive
A material having a plate shape is emitted and sandwiched between rolls.
An error appears over a large length due to a difference in roll diameter.
π
compensation is required. Feed amount becomes inadequate due to slip at rapid accel./decel..
Table indexing
A large reduction speed ratio is required for a large inertia moment of the machine table.
Rotational speed of the table is low and a worm-gear is often used.
Spindle dreive
In winding of wire material, etc., inertia moment becomes larger. Larger reduction speed
is necessary.
For constant peripheral velocity control, a control system should be checked.
Summary of Contents for Faldic-a Series
Page 1: ...RYS V Type User s Manual MHT258a Engl...
Page 55: ...3 28 MHT258a Engl 2 RYS amplifier a 0 03 to 0 2 kW 5 5 150 0 5 0 5 53 60 160 130...
Page 56: ...3 29 MHT258a Engl b 0 4 kW 160 130 60 80 53 150 0 5 0 5 5 5...
Page 57: ...3 30 MHT258a Engl c 0 75 kW 130 160 60 100 54 39 0 5 0 5 150 0 5 0 5 5 5...
Page 58: ...3 31 MHT258a Engl d 1 to 1 5 kW 160 130 60 115 54 54 0 5 0 5 150 0 5 0 5 5 5 Cooling fan...
