Praxair MIG SELECT-300H/4R Guide De L'utilisateur page 8

10 - Arcair mode (cutting and gouging) - only available on MIG 500 (optional) and MIG 650.
11 – Mecapulse – When selected indicates that machine is on Mecapulse mode, with wire speed oscillating between two
levels V+ and V- during two adjustable periods between 0.1 and 0.5 seconds (see #5 and #6). This function is specially
recommended to weld separated plates with fewer spatters and less distortion, replacing, in many cases, the electronic
pulse mode.
12 – Spot mode – When selected, indicates that machine is at spot welding mode, automatically interrupting the welding
at the end of the adjusted period (seconds).
13 – 2 times mode – When selected indicates that machine is under 2 times torch mode. To continuous welding torch
trigger must be always pressed.
14 - 4 times mode – When selected indicates that machine is on 4 times torch mode. Under extensive welding seams, the
operator can press and release torch trigger; the machine continues to welding. Press and release button to stop welding.
15 – Arcair/Spot/Mecapulse/2T/4T key button selector.
16 – Digital display – Shows the selected parameter value (Welding voltage, Up-slope time, Burn-back time, Spot time
and Post-gas time). During welding, the digital display indicates the welding voltage value.
17 – Selecting key button – Selects to adjust post-gas, spot, burn-back and up-slope time and welding voltage
parameter.
18 – Post-gas – When selected allows adjusting, between 0 and 10 seconds, the gas flow time after stop welding; this
protects the welding seam from oxidation and cools the torch.
19 – Spot time: When selected the welding spot time. After this time the machine automatically stops.
20 – Burn-back – When selected allows adjust, by means of the adjusting button, the wire length at the torch, at the end
of welding. The burn-back time can be adjusted between 0,1 and 1 second.
21 – Up-slope motor speed – When selected allows adjust, by means of the adjusting button, the up-slope speed motor
time till reach the selected speed. It must be adjusted between 0,1 and 1 seconds.
22 – U2 – Welding voltage – When selected indicates that welding voltage is showed on the digital display.
23 – Adjustment button – Adjusts the selected parameter value.
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MIG SELECT 300H/4R / 350H/4R / 400H/4R / 500H/4R / 650H/4R
Welding current
Gas flow
Torch trigger
1st time / push trigger
Welding current
Gas flow
Torch trigger
1st/2nd times
push/release
post-
gaz
2nd time - release trigger
post-
gaz
3rd/4th times
push/release