NextStep(DOCS) Optical Printer Control System NextStep(DOCS)
NAME
NextStep - NextStep micro stepping drives
NEXTSTEP STATUS LAMPS
---------------------
These drives have four status lamps on the front at the top/left:
"ON" - Grn=Legal power, Yel=Shutdown, Red=Overtemp
"FLT" - Yel=Interlock unconnected, Red=Motor Short
"BUS" - Yel(Solid)=Overvoltage, Yel(Flash)=Regen, Red=UnderVoltage
"STEP" - Grn=Incoming Steps (CW), Yel=Incoming Steps (CCW)
NEXTSTEP DIP SWITCHES
---------------------
The DIP switches along the front of the drive set the power
and microstepping resolution:
(FRONT)
┌───────────────────────────┐
│ NextStep │
│ │
│ (ON) (FLT) │
│ (BUS) (STEP) │
│ │
│ _ │
│ (/) AMPS │
│ _ │
│ (/) AMPS/10 │
│ │
│ () OFFSET A │
│ │
│ () OFFSET B │ Drive
│ _ │ Resolution ┌── Switches ──┐
│ (/) ANTI-RES │
│ ┌─────┐ │ (Standard) RES1 RES2 RES3
│ ON│ o-- │ REST │ ---------- ---- ---- ----
│ │ o-- │ IDLE │ 5,000 OFF OFF ON
│ │ --o │ WAVEFORM │ 10,000 ON OFF ON
│ │ o-- │ RES 1 │ 18,000 OFF ON ON
│ │ --o │ RES 2 │ 20,000 ON ON ON
│ │ --o │ RES 3 │ 25,000 OFF OFF OFF
│ │ o-- │ LOW/HI mH │ 25,400 ON OFF OFF
│ │ --o │ LOW/HI AntiRes │ 36,000 OFF ON OFF
│ └─────┘ │ 50,000 ON ON OFF
│ Industrial Devices Corp. │
└───────────────────────────┘
As an example, with SteppersOnline "M0-63-sized" 4.2 amp motors,
these settings worked fine:
REST: ON AMPS: "2" \__ together=2.5 amp
IDLE: ON AMPS/10: "5" / (low pow setting)
WAVEFORM: OFF ANTI-RES: "8"
LOW/HIGH mH: ON
LOW/HIGH AntiRes: OFF
NEXTSTEP STEP/DIR WIRING
------------------------
There are 3 optically isolated low voltage inputs: STP/DIR/SD
There's one optically isolated low voltage output: FLT
The three inputs are optocoupler inputs with two 100 ohm
resistors in series as shown here:
100 ohm ______
STP + (/)-----o-----/\/\/-----o----->| |
| |cap | |cap | OPTO | --> TO DRIVE
STP - (/)-----o-----/\/\/-----o----->|______|
100 ohm
100 ohm ______
DIR + (/)-----o-----/\/\/-----o----->| |
| |cap | |cap | OPTO | --> TO DRIVE
DIR - (/)-----o-----/\/\/-----o----->|______|
100 ohm
100 ohm ______
SD + (/)-----o-----/\/\/-----o----->| |
| |cap | |cap | OPTO | --> TO DRIVE
SD - (/)-----o-----/\/\/-----o----->|______|
100 ohm
The one low voltage output is basically the output transistor
of the optocoupler, when the drive indicates a fault condition.
______
FLT + (/)<---------| |
| OPTO | <-- FROM DRIVE
FLT - (/)<---------|______|
The input ratings are:
> 5-15mA @5VDC
> Setup Time=250nS (min on/off time)
The output rating:
> 50mA max, up to 30VDC.
> Normally conducting.
> Opens on fault.
The optocouplers are "HCPL-2631", so you can look up the datasheet
for the electrical particulars.
NEXTSTEP MOTOR WIRING
---------------------
It is important that the top and bottom terminal screws labeled "INTLK"
are wired *together*. Without this, the output amplifier is turned off
(unlocking the motor) and the "FLT" light will be on. e.g.
______
INTLK (/) |
B- (/) |
B+ (/) | Terminal
GND (/) | Block
A- (/) |
A+ (/) |
INTLK (/)____|
______|
The only other wiring needed is to the motor:
o The B-/B+ to one coil
o The A-/A+ to other coil
If you swap the wires for the A pairs, it changes the motor direction.
If the motor wire has a shield, it can be connected to the GND pin.
For 4 wire motors, it's simple and you can't really go wrong;
either you get CW, CCW, or no motor turning. It's not possible
to "short anything out" if you miswire the four motor coil wires
to the four A+/A-/B+/B- terminals.
For 6 wire motors, you can choose between SERIES or PARALLEL wiring;
o SERIES uses lower power and generates lower heat
o PARALLEL uses more power and generates more heat
In the following diagram, the '3's are the motor coils,
and the wire colors are for the IDC motors depicted in the manual.
See the manual for more information.
For SERIES wiring (low pow/low heat):
(B-) ORN ------------. .------------ RED (A-)
3 3
3 3
3 3
.--WHT/ORN ---` `--- WHT/RED--.
| |
`--WHT/BLK ---. .--- WHT/YEL--`
3 3
3 3
3 3
(B+) BLK ------------` `------------ YEL (A+)
For PARALLEL wiring (hi pow/hi heat):
(B-) WHT/BLK ---o--------. .--------o--- WHT/YEL (A-)
| 3 3 |
ORN----. 3 3 .----RED
3 3 3 3
3 3 3 3
3 3 3 3
3 3 3 3
3 3 3 3
WHT/ORN--` 3 3 `--WHT/RED
| 3 3 |
(B+) WHT/ORN ---o--------` `--------o--- YEL (A+)
AUTHOR
Greg Ercolano / erco@seriss.com / May 14,2024