Delta Electronics PCI-DMC-B01 Manual De Usuario

Revised March, 2012 

3-9 

Most application programs use an incremental encoder to retrieve position feedback. A 
homing operation is essential to performing accurate motion control. After the power is 
switched on, the status of the machine bench's position can be in one of three 
states. First, position is stopped at the homing position awaiting the next command; 
second, position is stopped at the ORG sensor; third, position is stopped somewhere 
between ORG and Limit Switch (PEL and MEL). Please refer to the block diagram 
in Fig. 3.15 below.   

 

M

1

2

13

PEL

ORG

MEL

 

Figure 3.15 

PCI-DMC-A01 provides different functions for each of the above conditions. For homing 
mode in a normal position, PCI-DMC-A01 offers up to 35 different reset to home 
functions (including the reserved part). The user can simply use software settings to 
have the hardware perform the user-selected homing operation. Once the homing 
motion is complete, the corresponding command and feedback position will be cleared 
to 0. The target position will however not be cleared to 0. The following graph shows the 
conditions for executing homing:   

 

Figure 3.16