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Messages - plasticbaldy

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1
G-Code, CAD, and CAM discussions / CNC Router Stuttering
« on: October 05, 2023, 01:59:32 AM »
Newbie question.
My Router stutters - doesn't run smoothly.
Motor tuning all 3 X,Y & Z axis have Velocity 3000 & Acceleration 200 set.
I'll attach a program that stutters.

2
FAQs / Re: Incomplete steps
« on: August 22, 2012, 11:34:47 PM »
Thank you BR. You were exactly right. Both solutions solved this problem.
You're a wealth of information. If you're any good at machine design then can you please make a suggestion to help me with my posting on CNC Zone ;
http://www.cnczone.com/forums/showthread.php?p=1157938#post1157938
I sincerely hope I haven't broken any Forum rules by mentioning that forum. These guys don't get jealous do they ? lol

3
FAQs / Re: Incomplete steps
« on: April 15, 2012, 06:04:56 AM »
Does that explain it starting a step before the previous step finishes ?

4
FAQs / Incomplete steps
« on: April 13, 2012, 05:12:22 AM »
I've been using my CNC router for a few years successfully now and have just replaced chains driving X and Y with ballscrews. I now have A Slaved to X with 2 motors & 2 ballscrews driving the X axis and another ballscrew driving Y.
It seems to function reasonably OK
EXCEPT
that when I crank the feed speed up rather than completing one line of G code before starting the next line it commences the following line early.
So for instance - where previously 3 lines of code gave me a straight cut in the Y direction followed by a CCW quarter arc and a straight cut in the X direction - but now before the first straight cut is completed the CCW arc starts (early) before the second cut in the X direction commences. I end up with an ugly big eliptical curve where there should be a neat little arc in the corner.
What's going on ? ???

5
General Mach Discussion / Re: Cutter Compensation - Help please
« on: August 19, 2007, 09:53:18 PM »
Thank you. I can't see the inside cut. Do I have to enter a G42 prior to my inside (slot) cut ?Since this is a router why can't the compensation just come in before the plunge & compensation off after the tool raises ? The tool isn't cutting prior to plunging. The cut is fine like this with the 5mm cutter.
I dont' think I'm understanding the function of lead-in in my process.

6
General Mach Discussion / Re: Cutter Compensation - Help please
« on: August 19, 2007, 01:30:23 AM »
Thank you. I'll try it. The lead in & lead out were already there (I think). The router goes to this position & plunges before the first cut ;
N0130 X-325.5000 Y231.0000
N0150 G00 Z0.0000
N0160 Z-15.0000
lead out and lead in for the second part ;
N0530 G00 X-323.5 Y231.0 Z0.0

N0540 G52 X-683 Y0.00 (Set Temp Offset)

N0000 (Filename: ~$Fig12LHmod008.tap)
N0010 (Post processor: Mach2.post)
N0020 (Date: 19/04/2007)
N0030 G21 (Units: Metric)
N0040 G40 G90
N0050 F1
N0070 (Process: Outside offset 0, Mill/Router, 5 mm diameter, 5 mm Deep)
N0090 M06 T1  (Mill/Router, 5 mm diameter)
N0130 X333.0000 Y223.5000
N0150 G01 Z-10.00 F1500
N0160 Z-15.0000
Final lead out ;
N0520 G01 Y225.5000 Z-15
N0530 G00 Z25.0000
N0540 M05

G52 X0 Y0 Z0 (Cancel Offset Shift)
N0580 Y460
N0590 X390

Are you saying that if I got Sheetcam to write the g-code without entering a tool diameter and then used D1 or D2 (or T1 or T2 - whatever) to set the tool offset for a perticular tool I could then write "G41 D1" (or "G41 T1") or "G41 T2"  for whichever tool diameter I then used ?

The reason I wanted to use tool offset in Mach3 is because I had made manual g-code changes to the code written by Sheetcam (for a 5mm dia tool) to perfect the programme. I've since discovered that a 3mm cutter is better and I had this crazy idea that I could tell Mach3 that I'm using a 3mm tool (using tool offset) and it would just make the code changes for me. The lead in & out were already written.

There are 2 parts to be cut in the programme (mirror image) - thus the temp offset - and they both have outside & inside cuts. Will the inside cuts be smaller with "G41 D1" set ?
thanks - Andy.

7
G-Code, CAD, and CAM discussions / Re: Cutter Compensation code
« on: August 16, 2007, 07:03:33 AM »
Thanks Graham. There was a lot of work making fine manual G code entry adjustments so the cut would fit the molded product & I wanted to avoid doing it all again.

8
General Mach Discussion / Re: Cutter Compensation - Help please
« on: August 16, 2007, 12:54:43 AM »
Thanks Brian. I've got the manual. I'm actually quite literate - It's my legitimacy that's in question. I've read Section 9 till my eyes are red. I don't know how to write the code for Cutter compensation.
OR
Am I supposed to rewrite EVERY line of my code using the information I've learned in Section 9 ?
Surely witing "G41" onto the front of line 12 of my code isn't going to tell my machine Which tool, How much compensation or anything specific to my newly installed cutter ?
Is there a manual for complete dummies like me ?

9
G-Code, CAD, and CAM discussions / Cutter Compensation code
« on: August 15, 2007, 08:23:29 PM »
Can somebody please tell me how to write the code to allow me to use a different cutter on my CNC router table programme so I can use  a 3mm cutter on a programme written for a 5mm cutter. The manual says G42/G43 but I don't know how to use it.
I've listed the 3mm cutter on my Tool Table as Diameter -2mm because the G Code was written on Sheetcam for a 5mm cutter & Mach3 shows the tool for the 5mm cutter as T1 Diameter 0. Is this correct ?
I've written G42 T2 (I've tried it everywhere between line 9 & 15). I've also tried G42 X-2.0 Y-2.0 & a few other codes but Mach3 still runs the cuts for the 5mm cutter.
In the code below what would I write to change the toolpath for the smaller cutter please ?
Is there a setting somewhere I also need to change ? Please keep as simple as possibe because I am (as simple as possible).

N0000 (Combined L & R Fig12 Targets with offset shift)
N0010 (Post processor: Mach2.post)
N0020 (Date: 20/04/2007)
N0030 G21 (Units: Metric)
N0040 G40 G90
N0050 F1
N0060 (Part: ~$Fig12RHmod001)
N0070 (Process: Outside offset 0, Mill/Router, 5 mm diameter, 5 mm Deep)
N0090 M06 T1  (Mill/Router, 5 mm diameter)
N0120 M03 S500
N0125 G00 Z40
N0130 X-325.5000 Y231.0000
N0150 G00 Z0.0000
N0160 Z-15.0000
N0170 G01 X122.0979 F1500 etc etc . . .






10
General Mach Discussion / Re: Cutter Compensation - Help please
« on: August 14, 2007, 10:08:41 PM »
"Cannot change axis offsets with cutter radius comp on line number #54"
But I've since decided that this relates to not being able to do both "Set Temp Offset" while G52 Cutter Radius Offset is programmed. I've written G40 (Cancel Cutter Radius Compenation) before line #54 & the Error goes away but the cutter compensation still hasn't worked between the lines where I've written G42 T2 (I've tried it everywhere between line 11 & 15). I've also tried G42 X-2.0 Y-2.0 & a few other codes.

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