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Messages - derek

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General Mach Discussion / Re: Tool changer control
« on: June 20, 2013, 06:06:27 AM »
This should help you out.


Post 19 has the macro.


SmoothStepper USB / Re: RE: spindle encoder on ESS
« on: June 04, 2013, 06:10:36 AM »
Yea they've been working on that A B thing for a few years now. I wouldn't hold my breath.


General Mach Discussion / Re: Stuttering problem with line segments
« on: April 18, 2013, 11:59:06 AM »
There have been other odd issues with older versions of M3 in some CV situations, which upgrading M3 have cleared up.  Perhaps you might try upgrading to Ver. .062, which cleared up a problem for me and some others. 

I'll give that a try.

Sorry, arcs i meant

That makes more sense!


General Mach Discussion / Re: Stuttering problem with line segments
« on: April 18, 2013, 06:40:19 AM »
Are you using an older version of M3?

John Champlain

Hi John
I'm running .056

I have noticed that when given the the choice of lines or arcs in CAM, if I choose lines it seems to smooth things out.

I read that as the complete opposite of what I'm experiencing. Line segments are smoother for you?

YOu may try backing down the accelleration number a bit ,it could help with the shaking.

I cut the acceleration in half and it's still quite pronounced. Unfortunately it becomes quite lethargic so I don'y know how that will affect things.


General Mach Discussion / Re: Stuttering problem with line segments
« on: April 17, 2013, 03:00:23 PM »
Thanks for the feedback guys.
That isn't a Zig Zag. That is the shake on the gantry every time it makes the z plunge and starts it's move. Since I'm profiling and stepping down .005" each pass it cuts the same chop each time so what you're seeing is the culmination of about 75 passes.
But at least it's consistent!

The smooth stepper isn't going to be around much longer as I'm probably going to move towards the Kflop direction or the UC100. I've never been overly happy with the smooth stepper anyway. I bought a Kflop/Kannalog combo for my crusader retrofit and that's probably the direction I'll be going. I'm really in a hold pattern until Mach 4 comes out to see if they implement any kind of jerk control.

As far as mechanics… Well it's a 60" gantry with too much weight and too little support. I was hoping I could get a handle on the clunking and hopefully that would buy me a little more time. This is the first time I was able to accurately document that it's a problem with line segments vs arcs. Terry I agree with you about Mach and line segments. It just really seems to have issues but ultimately it' probably more of a mechanical issue. I just wish Mach wasn't so bangie bangie when processing line segments. I don't have the 2 to 3 weeks it would take to build a proper gantry on my kind of budget.


General Mach Discussion / Stuttering problem with line segments
« on: April 17, 2013, 10:49:27 AM »
I’ve been ignoring this problem for a while now but it’s now bothered me to the point where I need to try and fix it.

The picture I’ve attached  is a cut using a waterline strategy. It was done with line segments as opposed to arcs. This section is where the Z drops down .005” and then proceeds around the perimeter. When it makes this move there is a noticeable thud and the gantry stutters. You can see it in the cut as the chop diminishes in size. The other corners are smooth so it’s only right after it makes a Z move. The Z move is on a line of its own.

If I convert the line segments to arcs the problem disappears.

I’m running a smooth stepper and if I convert any large tool paths to arcs then invariably the smooth stepper will crap out and throw an error at some point during the run. Usually about 15 min after I leave for the night:) So consequently I’ve stopped converting my tool paths to arcs. Nothing worse than setting up for a 12 hour run and you come in the next day and you only made it through an hour of it!

My look ahead in general config is set to 100. I bumped it to 200 with no change.

Here are a couple of links to videos.
The first one is of the line segments. If you observe my patented shot glass vibration meter you will see the jerk that ultimately causes the stutter.

The second video is of the arc segments. Note the lack of shake.

Any thoughts on this?


Oh and don't ask why I have a shot glass near my router:)

Well I'm not so sure about 062 at this point. I ran the machine all day yesterday with zero problems. Started up today and mach kick out a compiler error for the M03. Restarted Mach and it seemed to be ok. Looked over after a tool change and the spindle never started. Caught it before it did any damage. Had the same error message . I'm going to downgrade further to 056 and see what happens.


General Mach Discussion / Re: Mach blew right past tool change request
« on: February 27, 2013, 06:49:23 AM »
Terry: PM sent.

Hood: It' version 3.043.067


General Mach Discussion / Re: Mach blew right past tool change request
« on: February 26, 2013, 07:51:41 PM »
Mach has been known to ignore Mcodes from time to time.

That is why you should have some safety code in your M6 macros to Estop Mach in such cases as it skipping the Mcode.

Just a thought. (;-) TP

I did not know such macro code existed!

What pray tell would that look like :)


General Mach Discussion / Mach blew right past tool change request
« on: February 26, 2013, 06:47:52 PM »

So here’s the deal
This is on my knee mill with my 10 tool ATC conversion.

The code has been run well over 250 times and had been run 7 times before the incident.
9 tool changes total. First face with end mill. Second spot drill 16 holes. Third tap drill holes. Fourth thread mill....and there’s the problem. No holes for the thread mill. There goes $40.00 :(
It seems to have skipped right past the entire drill cycle .
It’s not a case of it missing the grab on tool #3 ( the drill) as it’s still in the carrousel. If the drawbar misses the pull stud (has never happened) the tool will just drop down when the carrousel retracts. The only plausible scenario I can come up with is Mach just had a giant fart and decided to skip over a whole tool operation.

Has anyone else with tool changers experienced this? I’m not overly concerned but it would be nice to know if others had seen this


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