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mistermikev

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Posts posted by mistermikev

  1. 24 minutes ago, curtisa said:

    Well that could be something to explore, as your pickup cavity Gcode doesn't do any moves where X and Y are driven at the same time. The way the pickup cavity is clearing the material is in a zig-zag pattern, whereas the neck cavity has those little 45 degree traverse moves in between each spiral move. Seems odd that you were able to do a more complex shape like the body outline without issues though; that should be full of simultaneous X&Y moves.

     

    Gecko G540 is parallel port only. Isn't your machine USB?

    that's a very good point about the body and was thinking that earlier myself... totally blows my theory.  

    yes, the gecko is parallel, I'd be adding on a pci slot parallel card to run that.  Would feel a bit like a step backwards.

    I guess another thing could be the laptop it's running on.  I was warned that laptops are not great for cnc but I've setup the power options to never sleep and kept the power supply way away from the setup... that said, I have a tower as I just built a new pc that would be terribly overbuilt for this purpose but i don't have another use for it... just need to get a monitor.  Would be worth a shot anyway.

  2. seems like what it is is... every time it tells it to travel at an angle but in the y direction... it is likely just going perfectly straight... but it things it's traveling at that angle... so it just ends up off by that angle compounded by however many passes it makes.  I think (and keeping in mind I have no idea) that it has something to do with this machine not following commands where it is moving along x and y at the sm time.  this is backed up by how it reacts to the keyboard jog.  if you hold two arrows... it only moves in one direction.  it can't receive two direction at once.  

    when i bought this machine - I had read a lot about them... and everyone says the mechanical is solid, steppers are decent, spindle is great... but controllers are just not good.  I've read thread after thread of folks trying things and eventually buying a gecko g540 and then you never hear from them again.  Further - usually those sm threads have 5or 6 posts of folks telling the person to get a g540 and not waste time trying to troubleshoot the chinese junk!!

    I hate to throw money at something w/o really knowing what's going wrong... but am getting a bit discouraged by the sm result over and over.  

    I've bought the cables to redo them... if I buy a new controller or not I'll redo those cables so... should have them setup in the next week or so. 

    I've found a g540 build but w/o spindle control for $450... and I could reuse this vfd or get a new one for $150... patch that into it with just a few components and that should do it... so thinking pretty hard on that!

  3. so I'll answer some of these and then go give a few things a shot...

    it moves to the position just west of the x with precision every time... like it was programmed to go there.  no stall, no variation.

    I read some about settings this morning and changed a bunch of stuff... including upping the pulse to 5... and it made the machine fast as all get out... but ran the original neck program and still does the sm thing.  

    will go check for stiffness and run the prog - thanks again for sticking it out here with me!  I fell like if I could at least zero in on the problem being w the controller... I'd feel pretty good about it... but it being an unknown... just frustrating!!

  4. sorry for delay... had some thanksgiving chores to do for the wife and (according to her) they were immediate need (happy wife happy life and all).

    so, finally got around to running it and catching it at the part where it does the neck... sm issues.  keeps returning to just west of the centerline and keeps progressing further east.  

  5. ( Step03a_CT5StringBody_V2.08_PU-EMG707 )
    ( File created: Monday November 16 2020 - 12:44 PM)
    ( for Mach2/3 from Vectric )
    ( Material Size)
    ( X= 15.900, Y= 20.400, Z= 2.250)
    ()
    (Toolpaths used in this file:)
    (Pickup-EMG707)
    (Tools used in this file: )
    (1 = End Mill MV {0.25 inch})
    N100G00G20G17G90G40G49G80
    N110G70G91.1
    N120T1M06
    N130 (Tool: End Mill MV {0.25 inch})
    N140G00G43Z0.8000H1
    N150S12000M03
    N160(Toolpath:- Pickup-EMG707)
    N170()
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    N5550M09
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    %
     

  6. 6 minutes ago, curtisa said:

    I'm inclined to think it's something else. If you look at my second diagram of your movement, the X axis will actually go east and west. The problem you appear to be having is that it won't go west far enough; the axis goes west as far as 0 and doesn't go any further. If it were something like step loss due to incorrectly set pulse widths and/or timing you'd expect to see the axis drift by random amounts in random directions when running any Gcode, not just this one neck pocket routine.

    good point.

  7. 5 minutes ago, curtisa said:

    That's really wierd. Almost looks like there's soft limits truncating the movement of the X axis in the negative direction. If you accidentally positioned your Gcode within the boundaries of your machine such that the workpiece overhung the negative X limit I would've thought Mach3 would give you an error on startup saying that the Gcode was larger than the maximum travel of the machine (or something to that effect) and prevent you from running the program. Might be more of a question for @MiKro - is it possible to accidentally set up Mach3 such that it will ignore the soft limits of the machine, and instead of halting the program it runs it anyway?

    It is worth exploring though:

    • All movement on the Y axis in your Gcode is in the positive direction (the cutter only goes 'more north' or 'less north').
    • Z axis only goes negative towards the floor, with the exception of a couple of movements where it is +0.2" above the work piece while repositioning (can you confirm that the Z axis actually does rise upwards above zero when it does these repositioning moves, or does it also get clipped at Z=0?).
    • X axis is the only one programmed to spend equal time moving positive or negative of zero.

    I'm thinking there may be something funny going on with the zeroing of your workpiece and machine before starting the program, and the lack of defined coordinate offsets in the Gcode header (see point 1 in my earlier post).

    What happens if you take the first few lines of your Gcode:

    And insert an extra line N115:

     

    well... and the pickup cavity just below that... extends further to the west than the neck cavity??  so it def isn't that since I ran that minutes before this!  and cut the body shape! and I ran the pickup after as well to ensure something wasn't all of the sudden physically stopping it!

    plus, I've copied my config file into mach3 new just to rule that out (soft limits and the like are all saved there).

    z was going above the piece as it seems to cut 'like normal' with the exception of location.

    the thing with coordinates... if I check them after... my y and z are right on... but my x has moved.  if it was changing the x... youd think it would start out east of ctr... but it doesn't.  I will try the N115:  - you just want me to put it as the first line?

  8. so was reading a similar issue with a guy but on his it was his z axis...

    "I posted my problem on the Mach3 yahoo group and got a solution from someone named Brian, who I think is associated with ArtSoft and Mach3. He told me to try adding 5us to the pulse width (bottom right corner of the motor tuning dialog box). Looks like that solved my problem"

    might give this a shot.

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