Advanced Micro Controls Inc. SMD23E2 User Manual page 37

SMD23E2 and SMD24E2 User's Manual
Assembled Moves (continued)
Dwell Move (continued)
The following figure shows a drilling profile that enters the part in stages and reverses direction during the drill-
ing operation so chips can be relieved from the bit. You could accomplish this Dwell Move with a series of six
relative moves that are sent down to the SMD23E2 or SMD24E2 sequentially. The two advantages of a Dwell
Move in this case are that the unit will be more accurate with the Dwell Time then you can be in your control
program, and Dwell Moves simplify your program's logic.
CW
CCW
1) You do not have to preset the position or home the machine before you using a Dwell Move.
2) The Dwell Move is stored in the internal memory of the SMD23E2 or SMD24E2 and can be
Controlled Stop Conditions

The move completes without error.

You toggle the Hold_Move control bit in the Network Output Data. When this occurs, the SMD23E2 or
SMD24E2 decelerates the move at the deceleration rate of the present segment to the Starting Speed
and ends the move. Note that your final position will most likely not be the one you commanded. A
Dwell Move that is brought to a controlled stop with the Hold_Move bit cannot be restarted.
Immediate Stop Conditions

The Immediate_Stop bit makes a 0

A positive transition on an input configured as an E-Stop Input.

A CW or CWW Limit Switch is reached. If the limit that is reached is the same as the direction of
travel, for example, hitting the CW limit while running a CW move, a Reset Errors command must be
issued before moves are allowed in that direction again. If the limit that is reached is opposite the direc-
tion of travel, a Reset Errors command does not have to be issued.
20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: (860) 585-1254 Fax: (860) 584-1973 http://www.amci.com
Segment 1 Segment 3
Segment 2
Segment 6
Because the Dwell Move is based on Relative Moves, it can be run from any location.
run multiple times once it is written to the unit. The Dwell Move data stays in memory until
power is removed, the unit is sent new Configuration Data, or a new Blend or Dwell Move is
written to the unit. As described in
also possible to save a Dwell Move to flash memory. This move is restored on power up and
can be run as soon as you configure your SMD23E2 or SMD24E2 and enter Command
Mode.

1 transition in the Network Input Data.
Segment 5
Segment 4
Figure R2.12 Dwell Move
Saving an Assembled Move in Flash
M C
OTION ONTROL
POSITION
on page 38, it is
37