IAI America ERC3 - Manual (Page 65)

Chapter 1 Specifications Check
1.2 Specifications 1.2.1
Actuator
55
• SA7C
Pressing Force [N]
Current Limit Value [%]
Ball Screw Lead [mm]
20 30 40 50 60 70
4 192 288 385 481 577 673
8 96 144 192 240 288 336
16 48 72 96 120 144 168
24 32 48 64 80 96 112
0
100
200
300
400
500
600
700
800
Pressing Force [N]
Current Limit Value [%]
SA7C Current Limit Values and Pressing Force
0 10 20 30 40 50 60 70 80
Lead 4 Lead 4
Lead 8 Lead 8
Lead 16 Lead 16
Lead 24 Lead 24
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.