Giant 20' x 3' x 2' router build

[charlieuk]

I finally got the driver installed on the pc to use pro tune so I can now set things up a bit better hopefully. I have to set the switches to on so guess I will have to re set the amps micro steps and idle current in there and then do the manual calibration? there seams to be quite a lot of other stuff that you can set that I don't have a clue about, is it anything I need to worry about? any tips ?

many thank

[JAZZCNC]

Yes set everyhting up in System Config screen first but then you tune the drives thru software using the current loop tuning screen.
In here you can play with the settings or just use Auto which is same as flicking dip switch 4.
99% of time auto works fine so I'd just use that.

In the System Config screen don't worry about the sliders etc they are for tuning resonance and unless you have any problems the default settings will work fine.
The main settings your interested in are at the top. Peak Cur(A) and micro steps. The others you can leave at defaults.
One other setting you may need to change when your setting up the Fault signal to activate the E-stop is the Alarm Signal Low - High option. This will depend on how you do it but often you have to toggle this so it activates when state goes High.

[EddyCurrent]

Dip switch 4 is a good option as jazz says, I use it mainly because it's a pain trying to plug into the drivers, if only they'd put that socket on the front

[charlieuk]

I think some how I had done something wrong the first time around trying to set it up so tried again. setting the micro step to 1600 and the amps to 4.2 and doing the auto tune.

am I right in thinking if I have a 2.5:1 and 1600 ms the steps per should be at 640?

[charlieuk]

oops ok realized I have gone wrong again im getting my steps per rev and micro steps mixed up. can any one clarify the difference?

[JAZZCNC]

Steps per is how many steps required to move 1 unit. So if your working in MM then how many steps to move 1mm.

Micro steps is how many micro steps to turn 1 revolution of the screw.

So the calcution for STEPS PER MM is first Divide screw pitch by ratio then divide Micro steps by calculated Pitch. IE 5 / 2.5=2 so 1600/2=800 Steps per MM

[charlieuk]

ok so is the 1600 we were setting using the switches witch on the side of the driver refers to as step/rev is the same as in pro tune when you set the micro step?

many thanks

[JAZZCNC]

ok so is the 1600 we were setting using the switches witch on the side of the driver refers to as step/rev is the same as in pro tune when you set the micro step?

many thanks

Ok I think I see your confussion Charlie.? There's 2 ways to describe the same thing.!
Some will say 4X 8X 16X etc which is technicly more accurate and this relates to the amount of degree's the stepper motor gives per revolution multiplied by the number.
Other way just assumes typical 200 steps per rev and gives total micro steps per rev.

IE typical stepper uses 1.8 degree or 360/1.8=200 steps per revolution. So 4 x 200 = 800 micro steps per revolution
If you used 1.2 degree steppers then it would be 360/1.2=300 so 4 x 300=1200 MicroSteps Per Rev

The Drives show typical 200 steps per rev on the front but the protune uses the more correct multiplication factor. so if you want 1600 micro steps you'd use 8 in protune.