03217917-01-01E By DEK Technical Reference Manual Vol 1_enPDFA.pdf - 第107页
9 MACHINE CONTROL 9.3 M36 MACHINE CONTROL ENCLOSURE TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 107 9.3.4.1 Dipswitch Settings Use the following graphic and tables to determine the correct dispswitch settings: S W …
9 MACHINE CONTROL
9.3 M36 MACHINE CONTROL ENCLOSURE
106 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019
9.3.4 Dual Stepper Drive Card
CAUTION
ANTI-STATIC HANDLING. STANDARD PRECAUTIONS MUST BE ADHERED TO
WHEN HANDLING ELECTRONIC CARDS AND CONFIGURING AND INSERTING
INTO THE ENCLOSURES.
The dual stepper drive card consists of two identical stepper motor drive circuits used to drive two
stepper motors, in half-step mode.
Each of the twin channels of this card consists of an IC which combines the conversion of the Step
and Direction inputs into control signals for the output to the stepper motor. These control signals
sequence the current in each of a pair of DMOS (Diffused Metal Oxide Semiconductor) H-bridge
motor drivers.
The card is connected to both the +24V SW and +24V US supplies. The switched (SW) supply is
protected by a diode-fuse transient suppressor circuit. The diode operates over an extremely short
time period, enabling the circuit to absorb voltage spikes without rupturing the fuse (F1 - 4Amp). If
a sustained voltage is experienced above its rating, the fuse ruptures. The +24V US is used to pro-
duce an internally regulated +5.5V (VCC and VDD).
Whilst the stepper motor is stationary, the card switches to half power to minimize power consump-
tion.
The card utilizes the mixed decay feature of the IC to achieve the best sinusoidal motor current
waveform for stepper motors. This decreases current ripple and hence decreases motor heating.
Each channel has a separate dipswitch which enables various circuit functions and are shown in
the following table:
Dipswitch Function
1 Enables Full/Half/Quarter/Eight Step Operation
2 Enables Full/Half/Quarter/Eight Step Operation
3 Half Power Timer Enable
4 INV_STEP
5 INV_DIR
6 Sets Motor Current Output
7 Sets Motor Current Output
8 Sets Motor Current Output
9 Percent Fast Decay_0
10 Percent Fast Decay_1
9 MACHINE CONTROL
9.3 M36 MACHINE CONTROL ENCLOSURE
TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019 107
9.3.4.1 Dipswitch Settings
Use the following graphic and tables to determine the correct dispswitch settings:
SW1
SW2
12
3
4
5 6
7
8
9
10
ON
12
3
4
5 6
7
8
9
10
ON
Card Position and
Dipswitch
Switch Positions
1 2 3 4 5 6 7 8 9 10
Slot X1 - SW 1 OFF ON ON ON ON OFF ON OFF ON OFF
Slot X1 - SW 2 OFF ON ON ON ON OFF ON OFF ON OFF
Slot X2 - SW 1 OFF ON ON ON ON OFF ON ON ON OFF
Slot X2 - SW 2 OFF ON ON ON ON OFF ON ON ON OFF
Slot X3 - SW 1 OFF ON ON ON ON OFF ON OFF ON OFF
Slot X3 - SW 2 OFF ON ON ON ON OFF ON ON ON OFF
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108 TECHNICAL REFERENCE MANUAL Vol 1 E By DEK 04/2019
9.3.4.2 Stepper Drive Card Edge Connector
The edge connector connects the card to the backplane of the enclosure.
a
c
2 32
Keyway
4
Pin No. Row a Row c
2 CH1 B- CH2 B-
4 CH1 B+ CH2 B+
6 CH1 A- CH2 A-
8 CH1 A+ CH2 A+
10 24V SW 24V SW
12 24V US 24V SW
14 24V US 24V SW
16 GND GND
18 GND GND
20 N/C N/C
22 N/C N/C
24 IDAT ICLK
26 IVPP DIR1
28 VCC OUT STEP1
30 DIR2 STEP2
32 N/C N/C