matt1978
www.lorch.eu
- Messages
- 3,966
- Location
- UK, Cannock
Hi Zst,
Thanks for making the decision to buy a Lorch product, I can assure you that it was the right one and I will give you whatever support you need.
When you talk about 'Burnback', this is the amount of wire that is left sticking out of the contact tip once you have let go of the trigger and the welding has stopped. Usually the factory pre-set is at 100% and this gives about 15-20mm of wire sticking past the end of the gas shroud ready for the next weld. As I said yesterday if you want to increase the amount of wire which is left sticking out, you need to decrease the 'Burnback time' from 100%, to say 80% for example. However if you want to decrease the amount of wire sticking out, you need to increase the 'burnback time'. The amount of wire sticking out shouldn't have anything to do with the actual wire type, so once you have set the parameter you are happy with you should be able to leave it regardless of weather you are welding Stainless Steel, Carbon Steel etc, however I will say that I have never had to change this from the factory pre-set 100%.
However, I get the feeling that you mean 'Arc length control', not 'Burnback'.
Your Arc length is purley the distance from the end of the wire to the top of the weld pool. When in Pulse mode, you should aim for the wire to just be sitting on top of the pool, so every now and again you hear an occasional crackle from the arc. If the Arc length is too short, then you will get a very coarse noise from the arc and there will be losts of spatter and you will see the wire physiacally touching/going into the pool. If your Arc is too long, you will hear a higher pitched noise and the wire will look like it is burning back to the contact tip, in the same way as if you were having wire feed problems.
In either case, the arc length can be adjusted from the Synergic line with the Potentiometer on the right hand side. The factory pre-set is at zero (like twelve o'clock on the LED range). If your arc is too short and you are getting lots of spatter, you can reduce/eliminate this by turning the potentiometer to the right (Clock wise) and this will then lengthen the arc, by increasing the voltage (wire burn off rate). If your arc length is too long you can shorten it by turning the pot anti clockwise, this will then reduce the voltage slightly and give the effect of more wire (slower burn off rate).
As a side issue to this, the Saprom has the facility for you to choose weather to adjust the arc length by Voltage or Wire Speed. By making a simple adjustment in the background menu you can change what the right hand potentiometer is changing from Voltage (which is factory pre-set) to wire speed. This will then have the opposite effect to how I described earlier, for example, if you wish to have a shorter arc length you can turn the pot to the right and this will now increase the wire speed, turning to the left will decrease the wire speed and give a longer arc.
In any case, in Pulse mode the wire should always be just sitting off the pool weather you are welding Steel, CrNi's Aluminiums etc, but you will have to do a bit of trial and error to achieve this arc length with the different wires. For exapmle , you may need to have the right hand pot set on -3 to have a good arc length for steel, and have it set on +6 to have the same good arc length on CrNi. The arc length is greatly effected by torch angle, stick out and more so shielding gas mix as Co2 value effects Arc voltage.
I hope that this has helped a little, if you need any more info please contact me.
Also, are there any other langauges (Apart from Serbian) that you would feel more comfortable with than English, as the machine language can be very easily changed to many European languages and I can also email you a user guide in the same langauge if it would help.
Thanks,
Matt
