Low Cost Torch Height Control Install and Setup Manual - CandCNC
Low Cost Torch Height Control Install and Setup Manual - CandCNC
Low Cost Torch Height Control Install and Setup Manual - CandCNC
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J15<br />
Tip<br />
Volts<br />
Workclamp<br />
+ [POS]<br />
L4<br />
R7<br />
- [NEG]<br />
Electrode<br />
36 THC Sensor<br />
39<br />
REV 14<br />
L2<br />
L1<br />
J11<br />
37<br />
ARC OK<br />
J3<br />
R2<br />
Volts<br />
<strong>Torch</strong><br />
Switch J10<br />
+<br />
Arc<br />
J5<br />
D2<br />
OK<br />
J4<br />
TP4<br />
TP3<br />
TP1<br />
TP2<br />
CONNECTIONS FOR SYSTEMS USING CT TRANSFORMER<br />
THC SENSOR CARD<br />
REV 14<br />
To TORCH -<br />
(ELECTRODE WIRES)<br />
DAMGER<br />
HIGH VOLTAGE<br />
WHEN TORCH<br />
is ON<br />
Mount card at least ½”from any<br />
6<br />
9<br />
Metal. UseVR2<br />
½”or longer st<strong>and</strong>offs<br />
above metal case Do not let shell<br />
of DB9 contact metal of<br />
Plasma Case<br />
FOR CT (Current<br />
Transformer) Input<br />
Only. See page<br />
information<br />
R1<br />
J14<br />
Tip Volts<br />
D6<br />
CAUTION!<br />
HIGH VOLTAGE<br />
Spark Gap<br />
For HV Systems<br />
J17<br />
CAUTION!<br />
HIGH VOLTAGE<br />
R6<br />
RV1<br />
J16<br />
D13<br />
CAUTION!<br />
HIGH VOLTAGE<br />
C1<br />
R8<br />
TO TORCH POS<br />
(WORKCLAMP WIRE)<br />
<strong>Torch</strong> Switch<br />
TORCH RELAY<br />
Arc OK[V]<br />
D22<br />
C<strong>and</strong>CNC<br />
D21<br />
TORCH<br />
ACTIVE<br />
ARC OK<br />
C2<br />
ARC OK LED<br />
ACTIVE ONLY<br />
WHEN CT INPUT<br />
is USED.<br />
DCP<br />
J1<br />
1<br />
5<br />
SENSIVITY ADJUST<br />
FOR ARC OK FROM<br />
CT Transformer ONLY<br />
Not used with other<br />
ARC OK methods<br />
TP1 - TP2 Test voltage:<br />
When torch fired = approx<br />
1/7th of Raw TIP VOLTS.<br />
(Divide by 7 circuit)<br />
DB9 Cable to<br />
Connector on DTHC<br />
Module<br />
CT Transformer is an OPTION <strong>and</strong> must be ordered separately. It is used on Plasma<br />
Cutters that do not have an available ARC OK (Called other names by different<br />
Plasma manufacturers). The ARC OK provides feedback to the control that a valid<br />
pierce has been made <strong>and</strong> the arc current is at a level where motion can be released<br />
<strong>and</strong> the cut begun. The ARC OK is used only when the control has the THC enabled<br />
(Screen button). IT IS REQUIRED for Automated cutting with THC. All C<strong>and</strong>CNC<br />
THC Sensor cards have had the ability to use an external Current Transformer (CT)<br />
placed in the AC line to the plasma. The CT will only sense AC current so cannot be<br />
used on the DC side of the plasma. A new DC Current Probe (DCP) will be<br />
introduced in 2009 (late summer) that will read <strong>and</strong> sense the actual DC current at the<br />
WorkClamp lead <strong>and</strong> the REV14 card has the pads for the connector that will<br />
interface the DCP (Digital Current Probe) through the THC Sensor. To use the DCP<br />
you will have to have a DTHC Module Rev 8 or later. You can trade in older DTHC<br />
modules for the upgrade when you purchase a new DCP module.<br />
Page 38
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