Messages

81

General Mach Discussion / Re: Turn tool-path display oddities...

« on: May 30, 2019, 01:28:00 PM »

Ah the Mach version thingy I'll leave that well alone i think as this is a multi profile setup and the other one has priority

I was thinking its more front tool post really - its just rotated 0 degrees to vertical

Quick question - when using your tool setting method, how do you set the first run of a part for Z position - there is no probe so do you just manually call the first tool and set with that?

82

General Mach Discussion / Turn tool-path display oddities...

« on: May 30, 2019, 11:53:27 AM »

Still fiddling with Turn and my mill/Lathe setup - some oddities with the tool path display have arisen i think, just my knowledge lacking probably.

Pictures attached,

1st one is with a simple thread path loaded, no tool called, display looks fine to me, the Z-Min & Z-Max DRO also look good.

2nd one shows what happens when i call T1 which although not a threading tool, IS set with correct offsets in the table. The numbers are now meaningless and the display even less so

3rd one is the tool table entry for T1

4th pic is the path display after scrolling way to the right - it seems to think the part is now massive??

So, if if call T1, set my Z by touch-off, press path regen, the file will run ok but the min/max numbers are useless

I have index-homing so i set my tools using Hood's method which references them to the machine home position if i understand correctly, hence the large offset numbers.

Any ideas why things are a bit screwy - i know its tool related but in what way and can it be fixed by my changing something i do??

Thanks

83

General Mach Discussion / Re: Mill or Turn?

« on: May 28, 2019, 08:00:48 AM »

Ah that's good to know, I know talking about other products is frowned upon so will keep it minimal

Yes, oddly though it still faulted when i set the max rpm to 2950 but at least its happy now.

84

General Mach Discussion / Re: Mill or Turn?

« on: May 28, 2019, 06:20:07 AM »

I know I have stopped this thread due to it being against rules but was hoping to add one more entry for closure - might help someone in the future.

I think I have fixed it

Two parameters -

PN020 - Motor rated speed - this is set by default motor settings
PN051 - Motor Max Speed - this is a user adjustable one

PN051 Max was set at 3000 - i had tweaked this before but not the other one as it's a default setup one.

I have now set both to 3050rpm and away she goes

My working theory is that the controller was calling for 3000 but the drive was maxing out somewhere around 2990 - where it faulted so it was stuck in an endless fault loop - controller saying "I want more” and the drive saying “you can't have it”

Short video…

https://youtu.be/ksGlgcCWO4s

I think it makes sense??

No idea about tuning yet but that is not for the mach Forum, thanks for all your patience on this one guys

85

General Mach Discussion / Re: Mill or Turn?

« on: May 27, 2019, 04:03:49 PM »

as mentoined in Reply#120

Of course, i'll butt out on this topic, apologies again.

86

General Mach Discussion / Re: Mill or Turn?

« on: May 27, 2019, 08:59:00 AM »

Using my bench PSU at 10v it was giving 2965rpm one way and 2971rpm the other.

It was also creeping with the inputs shorted out.

I ran the auto zero speed set function which killed most of the creep.

Then adjusted the gain to 305rpm/V

It now gives 3000rpm forwards and backwards.

Did it fix the issue?

No


A short video of the Pid screen at 2990rpm and 3000rpm

https://youtu.be/i7GEe7jAoY4

87

General Mach Discussion / Re: Mill or Turn?

« on: May 27, 2019, 05:07:52 AM »

Its not encoder related as far as i can see 

I had a spare 600ppr encoder so wired that in and connected it by clamping in the spindle.

It still suffers the same fault, just slower as there are only 2,400 pulses instead of 10,000 per rev - the error count just goes up slower.

It still worked ok until 2980rpm.

88

General Mach Discussion / Re: Mill or Turn?

« on: May 26, 2019, 12:12:14 PM »

Great minds and all that...

I did that this morning after RTFM again - its a bit vague and one diagram shows no connection, another shows the 0v connection.

The are connected now but it made no difference.

89

General Mach Discussion / Re: Mill or Turn?

« on: May 26, 2019, 09:44:17 AM »

Not really, i do have a single-ended one somewhere, would have to order a line-driver to get differential output and its only 1024 pulse IIRC

90

General Mach Discussion / Re: Mill or Turn?

« on: May 26, 2019, 08:59:32 AM »

Manual shows them as buffered outputs, AM26ls31 line driver.

I have tried two cables - my go-to tester which was a centronics printer cable, now i have made a new cable with proper encoder cable, twisted-pair, shielded etc, damn expensive stuff too.

The cable is less than 1m long.

I cant find any tech spec on the CSMIO inputs though other than max freq is 6Mhz