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Messages - salty72

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11
General Mach Discussion / Re: motor tuning
« on: December 06, 2006, 07:17:34 PM »
well now I'm annoude ( read Very upset!!!) i have just spen the last ten mins writting a responce setting it up and adding files then I hit thew submit button to find you can't post MC9 files and Oh you need to re-type all the crap you have previousely said.

well here is the DXF file

If you nee more info e-mail me salty72(AT)tsn(DOT)cc

Also attached is the VFD spindle I'm using and it's controller (it's the 1.5Kw 220Vinput spindle)

12
General Mach Discussion / Re: motor tuning
« on: December 06, 2006, 06:15:24 PM »
Brett,
 
        Thanks for that I had to have a look to see what G64 (CV was) and I will try this to night, the program I'm using is MC9, you might have noticed that the file is a 3D shape and Mach3 originally didn't like changing from G17 (x-y cutting plane ) to a G18 (X-Z cutting plane) it kept claiming the start of arc is different to end of arc in previous line, even when I-J incremental mode was changed.  (if you want the DXF or MC9 file I will post)

    So I re-drew the shape and made it a spline instead of a chain. then re-analysed the tool path and this is the result.  (note: the mold that the sunnies sit on thru which I suck the vacuum was cut using the same point to point style of programming [cutter was 3/8" ball mill with 8% overlap at 4600mm/min ] the only difference between then and now is that I have changes spindles from a Ryobi 2Hp router to a VFD 1.4Kw high speed spindle - I wonder if the spindle frequency is interferring with the steppers??)

Graham

     I did notice that cutting at 4600mm/min took 1M43S to cut and at 2600mm/min only took 3Sec -- so to get this clear in my own head (this could take a while ;D ) ....is you theory that the router won't try to accelerate to full speed at the same time as it's trying to slow down?? 

ONE OTHER POINT OF NOTE...       Last night I tried to get a video of the cutter in action, but for me to set up and start filming I reduced  the speed using the FEED RATE OVERRIDE and upon dropping the speed to 20% of 4600mm/min,  it did as advertised --cut slower.. but it  also kept the chunky action at the end on each line or direction change... (that sudden start stop).

I wonder if its worth trying to reduce the acceleration and/or max speed to ensure a softer start and more constant run speed...... but then wont Brett's G64 do the same thing, Find out the answer to these and other intriguing questions in next weeks exciting episode of the day in the life of a Dayton Owner VTIC

13
General Mach Discussion / Re: motor tuning
« on: December 06, 2006, 06:55:33 AM »
guys I have a Dayton Router

(READ>>>> home made by some Chinaman on 20Cents per day making his wages on the parts he didn't fit into my machine - Sorry for the tears [for further background check out the CNCZONE forum and search for Dayton routers ] )

Anyway onto my question... I am trying to cut this file out (see attached) but instead of a smooth constant motion i get some smooth tool paths and some jerky cresent type movement and a lot of start stop or as I like to say SLAM/START- BANG/STOP.  I and using 300" steppers on a rack and pinion drive the motors are set to (see attached file)  the feed is mm/min(G94) and not per REV (G95) I have tried reducing the feed rate fromm 4600mm/Min (which is ok for Xmas cut outs) to 2400mm/Min but I still get the jerky overshoot cutting in some areas. ... Oh the material is an extreamly hard Polycarbonate.  If this has any bearing on the whole situation ???

14
Yer I tried the Boss Mach.Pst file and got the same errors, when you go thru and remove all the $ signes then there are other messages saying things like "errror in line 137 qualifier expected ($) or other such device"

I am currently using the PSt offered by Novalab and have no problems (touch wood...SO FAR!!!) .

15
General Mach Discussion / Re: Load Mach3 to Laptop
« on: November 19, 2006, 08:33:41 PM »
when I loaded Mc3 admitidly it was 1.84.000 and my Lappy didn't have the power to drive the parrallel ports, but I was able to use it fine and I wasn't on the net

16
G-Code, CAD, and CAM discussions / Re: converting *.Mc9 to Mach3 G-code
« on: November 16, 2006, 07:44:59 AM »
Graham, that is exactly how it's suposed to look, If you could tell me how to create a screen dump I will post some other pics also I notice that your screen shots have a dotted area for the material how did you get that...

As to the IJ they are currently set to incremental

17
G-Code, CAD, and CAM discussions / Re: converting *.Mc9 to Mach3 G-code
« on: November 15, 2006, 07:59:47 PM »
Graham,
Thanks for that, I see that you have trimmed the curve to form the glasses, I must appologuise for not being a little more clear....

The curve will be used to cut a MDF former, I plan to drilled a few holes in the top surface and sealed th side so that when I apply the vacuum to hold the polycarbonate lens material I won't (hopefully) loose any vacuum.

I have found an alternate method to give me a finishing cut on the surface of my MDF former (see attached)

 selected the Z-axis as a theoretical 4th axis, although it created a 20,000 line G-code point-to-point program it was very smooth and fast (7min34sec) the cutter moves  from front to back and then left to right
 
I am planning on cutting the the glasses shape using the feature Toolpath>translate>to_surface.
I hope that this feature in Mc9 wraps the glasses shape to the curved surface rather than, what I suspect will be a staight out vertical translation ( this will mean the glasses will be wider than I need them...

Anyway.....getting back on track!!!!, the Mc9 verify feature showed the tool path cutting from left to right in a vertical curve the cuter then moves accross and goes back to the left, moves across again and again back to the right.... yet (when I can get it into Mack3) the Nc file tells Mach3 to draw full circles much like grahams previous screen capture...

WHAT I find interesting is  I HAVE HAD THIS FILE IN MACH 3 BEFORE  but it now appears that ever line in the NC file that has G18 at the start of the G-code has an incorrect start / finish radius

isin't it the way... as usual once youv'e call for the TECH you can't repeat the origanal reported problem ....  [ why Mach3 trys to cutt full circles and not just arcs]

As to the new problem [incorrect START/FINISH points]....Is it possible I have an incorrect POST or I have some how changed my Mach3 settings inadvertantly (you know.. something like when you set the chaining tolerance)


18
G-Code, CAD, and CAM discussions / Re: converting *.Mc9 to Mach3 G-code
« on: November 14, 2006, 10:24:43 PM »
well this is all ver y interesting, I just upgraded to 1.84.002 I then imported that Txt file back into Mach3 and sure enough I get the error end points no the same as start radius on line... 

The problem is I copied the text directly from my Router PC and then changed the extention from NC to Txt.

the other point of note is that the Pic posted by Graham looks nearly like mine in Mach 3... However my 'ring' is complete

as requested here is the Igs file (it includes all the levels etc..  the convertion from MC9 to Igs was done using Mc9 so not promisses)

Salty

P.s I will try and reinstall 1.84.000 to see if this has any bearing on the issue

19
G-Code, CAD, and CAM discussions / converting *.Mc9 to Mach3 G-code
« on: November 14, 2006, 09:48:50 AM »
I have this problem I have a Mc9 surface file that verifies correctly but when imported to Mach3 the file becomes a full 360 surface that exceeds the limits of the machine

20
General Mach Discussion / Re: Post error
« on: November 14, 2006, 09:35:57 AM »
I too have tried the BOSS post and found that all the $ signs need to be removed then it continues you need to work it further the story goes on and on

here is a router post from Mc9.1 I have been playing with the Boss post and making changes based on what appears against the ROUTER Post from Mc9.1

But as I don't know what the hell I'm doing I think I'm just creating a copy of the ROUTER Post


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