Low Cost Torch Height Control Install and Setup Manual - CandCNC

IN
1
2
1
2
3
1
2
3
65
Contrast
VR1
PWR
CandCNC
LCTHC REV4
0710
SIP1
U14
1
C13
J1
U5
R17
U4
G540 I/O
J3
1
16
J12
3
2
TORCH
ON
THC
DWN
1
THC
UP
LCTHC
17
1
U2
32 U10
Torch
REMOTE
ON/OFF
J7
D
G
S
Q1
R31
1
1
U3 3
Encoder
2
1
TEST - 2
+ 1 +
J5
12VDC
THC SENSOR
J6
PC+5
PCGND
ARC
OK
IN
+
12VDC Bias
WALLPLUG
+
TORCH
PC+5
DWN
THC
THC
J3
1
32
1
-
PCGND
UP
ON
J6
OK
ARC
J12
G540 I/O
+
THC SENSOR
65
J5
+
12VDC
To G540 Interface Card
(OPTION)
PC+5 (pullup source)
See notes below on this signal
COMMON RETURN (Com)
Must be connected to the common
return for the inputs. On a Isolated
BoB that is the INPUT GND or INPUT
COM. On non-isolated (inputs go
stright through to PC parallel port) then
this is connected to PC Ground
Common Return (shown as PCGND on card) is needed on all installs. It’s connection
point depends on what ground the inputs are connected to. On some systems (powered
and isolated BoB’s) the Common Return is NOT PC Ground (or PCGND as stenciled on
the LCTHC module). [ This name will be changed on the next release] See the different
sections for hooking up the different types of connections. ONLY if the input connection
is directly to the PC parallel port OR the BoB input is NOT isolated from the PC port do
you use PCGND as the Common Return.
For installs that do not have a BoB with opto isolator input OR a pull up resistor on each
input of the BoB you must furnish a source of +5 that shares the same connection as the
PC GND pin. The PC power supply has +5 and PC Ground on all of it’s power pins that
connect drives to the PC power supply (internally). You can buy cables that will let you
tap into the PC power wires to get the need +5.
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