Voltage Divider Adjustment; Output Voltage Sample - ESAB ESP-101 Manuel D'instruction

SECTIoN 3
WarNINg
3.7

Voltage Divider adjustment

It may be necessary to adjust the Voltage Divider or VDR to match the particular height control system. There are two de-
fault settings for the ESP-101 models as shipped from the factory:
• STANDARD UNITS (Non-CE): 750 ohms (21:1)
If the height control system does not match the factory default setting, matching can be accomplished by adjusting the
VDR potentiometer on the Current Sensor PCB4 located behind the left side panel.
1. Place ohm meter leads between P1-2 (orn) & P1-3 (gry). Adjust R2 to achieve the desired divide ratio for the
particular height control system used. For example:
•
•
Ohm meter readings can also be taken at the CNC receptacle on the rear panel of the machine, between pins C and H.
2. If desired, additional minor adjustments of the VDR potentiometer may be made. Any adjustments should be
performed by a qualified technician.

3.7.1 output Voltage Sample

Output Voltage Sample - Some Cutting Machines sample the full output voltage of the plasma system to control the torch
height and to determine when to start moving. The full output voltage is available within the machine on a pair of male
spade terminals (J3 and J4).
1. Remove insulated terminals to provide access to the male
spade terminals. (If needed, the insulated terminals may
then be used to terminate the voltage pickup wires.)
MaKE SurE PoWEr SWITCh oN CoNSolE IS IN off PoSITIoN aND
PrIMarY INPuT PoWEr IS DE-ENErgIZED.
16:1 ratio 1000 ohms
18:1 ratio 882 ohms
Output Voltage Sample
• CE UNITS (Europe): 789 ohms (20:1)
• 21:1 ratio 750 ohms
• 20:1 ratio 789 ohms
Note:
Potentiometer
(R2)
P1
23
INSTallaTIoN
+
-
J3
J4
(+) (-)