Specifications

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
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APPENDIX B
UPGRADING TO THE SD17063 REV. B
Replacing a SD8055
The SD8055 is an older AMCI stepper drive that has been phased out and replaced by the SD17063 rev. B.
The SD8055 is still supported by AMCI but it is no longer sold as a new unit. The SD17063 rev. B has several
advantages over the SD8055. Because of its higher bus voltage and output current, the SD17063 rev. B can
generate more torque from a motor and the drive’s features give you better control over motor operation.
Before replacing the SD8055, verify that the motor’s insulation is rated for the SD17063.
Minimum phase-to-phase and phase-to-ground voltage rating is 500Vdc. All AMCI motors
meet this specification.
DIP Switch Settings
h Pulse Train Input, SB1-1:
Set to Pulse /Direction (SB1-1 = 1)
h Anti-Resonance Enable, SB1-2:
Feature not available on SD8055. Set to Enable (SB1-2=0)
h Anti-Resonance Phase, SB1-3:
Feature not available on SD8055. Set to Normal (SB1-3=0)
h Current Loop Gain, SB1-4/5:
Feature not available on SD8055. Set to Typical. (SB1-4&5 = 0)
h Current Control, SB2-1:
The SD8055 drive was designed to control the peak current through
the motor. For complete compatibility, set SB2-1=1, which selects
Peak current control on the SD17063. However, if you are micro-
stepping your motor, AMCI strongly suggests using RMS current
control (SB2-1=0) because this will give you more torque.
h Idle Current Reduction,SB2-2/3:
There is a “50% IDLE” switch on the SD8055. If this switch is
pushed toward the “50% IDLE” label on the SD8055, then set the
SD17063 to it
To 50%
setting. (SB2-2=0, SB2-3=1) If the DIP switch
is pushed away from the label, then set the SD17063 to
Not Reduced
.
(SB2-2 and SB2-3 =1) If your system does not require holding
torque, then consider eliminating the current when the motor is idle.
(SB2-2 and SB2-3 = 0) This will significantly reduce motor heating.
h Output Waveform, SB2-4/5:
Feature not available on SD8055. Set to Pure Sine (SB2-4&5=0)
h Step Resolution, SB3-1/2/3/4:
There are four “MICROSTEP RESOLUTION” switches numbered
1 through 4 on the SD8055. They correspond directly to the
switches on the SD17063. Switch 1 corresponds to SB3-1, switch
2 to SB3-2, switch 3 to SB3-3 and switch 4 to SB3-4. On the
SD8055, having a switch pushed toward the number on the switch
corresponds to a “0” on the SD17063. Having it pushed away from
the number on the switch corresponds to a “1” on the SD17063.
h Motor Current, SB3-5 & SB4:
There are six “DRIVE CURRENT” switches on the SD8055. If you
have the manual for the SD8055, it is easier to look up the value the
switches are set for and look up the switch setting for the SD17063
on the worksheet. If you don’t have the manual, use this procedure:
1) Sum up all of the values that have a switch pushed toward its
label. Example: The 0.8 and 1.9 switches are the only two
pushed towards their labels. The sum is 0.8 + 1.9 = 2.7.
2) Add 0.5 to the sum found in step 1. This is the current setting
for the SD17063. To finish the example, 2.7 + 0.5 = 3.2 amps.
This appendix gives information on upgrading from an AMCI SD8055 or older revision SD17063
to the SD17063 rev. B. This information is valuable if you are replacing one of these units or are
upgrading the design of your system. Information on setting the switches of an SD17063 rev. B to
mimic the older units is given as well as information on wiring and operation changes.