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11-09-2015 #35
Ok, we have action
Mixed bag of results, sort of exciting and disappointing all at the same time.
The good parts...
It works, speed is no issue,
The ripple effect in my cuts has disappeared,
It does not shake and wobble all over the place,
The bad parts...
The voltage is still way off of book specs, no change,
Can't get a clean cut on aluminium yet,
Need to work on divots,
Here we go...
Pierce & Cut heights are all as per book and this was checked several times by stopping mid cut and measuring the gap.
35mm washer, 45A 107v, 4000mm/min. Nasty divot as no cut rules yet just perpendicular lead in and no lead out.
Add a 2mm overburn and turn torch off 2mm before end - divots now pretty good.
Same speed, acceleration as listed, small shape again - 35mm sq. Same 2mm overburn etc but divot is terrible again????? There is a marked improvement between the 1st and 2nd cuts but little change between 2nd and 3rd so i set the acceleration at 1500mm/s/s. I can improve the internal corners a bit by setting Mach to stop CV on angles > 89 degrees but don't know if that is a good idea or not??/
3mm aluminium - 6400mm/min 45A 106v, lots of top dross, tried slower but made little difference. Had better cuts on old machine
1.2mm stainless is not too bad, 7900mm/min 45A or 4800mm/min 30A 109v
10mm steel, 0.9s delay, 117v, 500mm/min 45A.
Had one nozzle blow out completely, was getting poor cuts and found the orifice practically missing, no idea how that happened at all, as i'm testing I have been very careful of wrong pierce heights etc.
So, as i said, a mixed bag really. The divots are concerning, I need to get that bit nailed as well as the aluminium.
If anyone wants to chime in with some useful settings, please do. Is there a group test file that those with some spare minutes could cut for comparison???
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