I believe -4 and 5 are pretty much the same as far as options and codes, Vanbiker might know.
Ive heard some people saying the g8 doesnt change anything but I believe those were the very early year options.
so essentially we have the same fadal control wise.
have you checked your mechanics to make sure everything is up to par ie backlash gib tightness thrust bearing play, as well as coupling fit.?
amp tunning is also a must and its really simple to due.
I did it with the following error display, when I had a tech in to do the ball bar test he did it with a mater and the following error display it was simple I hadnt done it in 2-3 years now.
the amps being tuned makes a huge difference in the way the machine runs it circles as well as angles. providing that the mechanics are all good.
your witness mark as you call it is more of a programming error or mechanics being off..
just remember with a fadal use a lead in, then g03 or what ever the dry pass then lead out with or with out comp and go at least 50% slower in feed on the circles. if you start training yourself to do that when programming it will minimize your witness marks or getting rid of them 100%.
almost every fadal should be able to run perfectly once the mechanics and tunning is done. tuning is free and easy, tighten gibbs is free and easy, the thrust bearings is pretty cheap ( i think 50 bucks a axis maybe 100) and kinda easy.
personally if you want a as perfect as you can fadal get it ball barred it ran me 500 bucks if I recall and money well spent. cause he fine tuned it , checked and tightened gibbs etc.
I believe I have pictures of all the stuff, basically just for my own reference when I was taking stuff apart, if you need them I can try to find them as well as help you out on it
Hope that helps.
Question about the tuning above. I know absolutely nothing about the tuning/electronics side of this machine, or any machine for that matter. The mechanics side, I am not as timid about messing with because it seems intuitive and I'm not a stranger to that type of thing.
However, I am 100% interested in learning more about the other stuff. The amp tuning you mention above piqued my interest as I have done nothing to set this machine up since moving it here besides leveling it. Not sure if it needs it or not.
Pulled out the manuals and opened Google. Found this link:
https://fadalparts.net/pages/more-help.htmlbrushless-amplifier-adjustment-/ Seems to match what you describe above.
In the maintenance manual, the procedure states to set the master feedrate clock. Ok, that is in the manual, seems straightforward enough.
For the position loop gain following that, the manual states adjustments are shown using Fluke Model 27. The link I posted above mentions nothing of a voltmeter. It says to adjust until the target value of 595 is displayed.
Question is, can I follow the instructions in the posted link? Or do I need a better quality voltmeter to do this? I currently just have a cheapo $50 HomeDepot meter to do random stuff around the house.
Sorry for the long question, just trying to learn this stuff.
