IAI America ERC3 - Manual (Page 66)

Chapter 1 Specifications Check
1.2 Specifications
1.2.1
Actuator
56
(2) Rod Type
• RA4C
Pressing Force [N]
Current Limit Value [%]
Ball Screw Lead [mm]
20 30 40 50 60 70
3 106 159 211 264 317 370
6 53 79 106 132 159 185
12 26 40 53 66 79 93
20 16 24 32 40 48 56

RA4C Current Limit Values and Pressing Force
0
50
100
150
200
250
300
350
400
Pressing Force [N]
Current Limit Value [%]
0 10 20 30 40 50 60 70 80
Lead 3
Lead 6 Lead 6
Lead 12 Lead 12
Lead 20 Lead 20


 
Caution: (1) The relation of the current limit and the pressing force is a reference
assuming when the speed is 20mm/s.
(2) There will be a little variance in the actual pressing force. If the value of
current limit is small, the variance for the pressing force becomes big.
(3) Use the product with the current limit within the range specified in the
graph. If used below 20%, the pressing force would not be stable. An
operation may not be made in some cases. An operation cannot be made
also when it is beyond 70%. If use in such a condition, it may extremely
shorten the product life by the degradation of insulator in the motor coil due
to heat generation.
(4) When the approaching speed (setting in the position table) to the pressing
start position is 20mm/s or less, the pressing operation will be made with
the approaching speed. In this case, also, the pressing force would not be
stable. In such cased, check in advance that the actuator can be used with
no problem before start using.