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Author Topic: Smoothness EXTREME need of help  (Read 10615 times)

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Smoothness EXTREME need of help
« on: November 12, 2009, 05:08:31 PM »
Hi all,

My name is Bryson Korsboen and I am a mechanical engineer working for a lighting company called LSGC.  Although i am a design engineer, I have been give the great task of sealing glass onto a fixture via silicone.
We have a standard XY table.  Attached to the XY table we have a syringe that dispenses silicone though means of a pneumatic air gun.

I have written a program for the XY table to follow a simple rectangle with rounded edges to follow the profile of the fixture Using the G-code below and MACH3 software.  In each step, the motors come to complete stop before the next step.  Is there any way for the steps to have no pause in between them.  The clue dispensed is at a fixed amount and at each step the glue piles up.  

Can someone please give me example code, MACH3 settings, or hardware/software that I need to get the machine to run through the entire rectangle without momentarily stopping?  Below is the code I'm using.

O1111 (DOES 1 COMPLETE 1 FT FIXTURE)
( W .020 RTV THICKNESS)
(X0 CENTERED ON LEFT RAIL OF FIXT.1)
(Y0 AT EDGE OF PART)
(Z0 AT HIGHEST POINT OF FIXTURE)
(DC 732 AT 45PSI,GREEN PLASTIC TIP)
(5-15-09 REV.= )
G0 G90 G17 G40 G54
(DISPENSING)
G0 X-7.0 Y3.0 Z.5
M00 (VERIFY DISPENSE)
G0 X-.0858 Y-.5
G0 Z0
G01 Z-.26 F20.0 (SET NEEDLE HEIGHT FOR 1)
M00
M98 P17
G90 G0 Z.5
X-7.0 Y3.0
M00 (WIPE TIP OF DISPENSER)
Y24.0(INSTALL GLASS)
M30
%

O17
G0 G91 G17 G40
G01 Y12.18 F180
X.155 Y.155 r .175 F180 (motor stops)
M01
G01 X1.48 F180
G17 G02 Y-.155 X.155 r .175 F180 (motor stops)
M01
G01 Y-11.50 F180
G17 G02 X-.155 Y-.155 r .175 F180 (motor stops)
M01
G01 X-1.48 F180
G17 G02 X-.155 Y.155 r .175 F180 (motor stops)
G4P0
G01 Z -.02
G01 X.1
G01 X-.1
G01 X.1
M99
%


Don't hesitate to email.

I need immediate help as this is quite frustrating and I have limited experience writing G-code.

thanks,

Bryson

bkorsboen@lsgc



Offline Hood

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Re: Smoothness EXTREME need of help
« Reply #1 on: November 12, 2009, 05:16:18 PM »
put a G64 near the beginning of your code, on the line with G0 G90 G17 G40 G54 would be fine.
Hood
Re: Smoothness EXTREME need of help
« Reply #2 on: November 12, 2009, 05:24:21 PM »
I tried that and it still doesn't not go as smoothly as I would like it too.

Thanks, but any other suggestions?

-bryson

Offline Hood

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Re: Smoothness EXTREME need of help
« Reply #3 on: November 12, 2009, 05:29:18 PM »
Not really unless the acceleration of your motors are very low.
Hood
Re: Smoothness EXTREME need of help
« Reply #4 on: November 12, 2009, 05:54:28 PM »
How do I increase the acceleration of my motors?

-Bryson

Offline Hood

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Re: Smoothness EXTREME need of help
« Reply #5 on: November 12, 2009, 06:12:07 PM »
You need to use the motor tuning page to get the best performance out of your motors, maybe you are already at the best performance, its the only thing I can think of at the moment.
Hood

Offline Chaoticone

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Re: Smoothness EXTREME need of help
« Reply #6 on: November 12, 2009, 06:13:14 PM »
That is handled by your motor tuning. If you decide to give it a try write down the settings before you adjust any thing so you can revert back if necessary.  Config. tab, motortuning is where you will find it.

Brett
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Re: Smoothness EXTREME need of help
« Reply #7 on: November 12, 2009, 06:14:32 PM »
I tried the motor tuning and the increments got all wacked out.  What are some safe settings that will get me the smoothness i need?

Offline docltf

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Re: Smoothness EXTREME need of help
« Reply #8 on: November 12, 2009, 06:14:46 PM »
use g64 like hood said,and edit out those M01 stops.then it should go pretty good.

Offline Hood

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Re: Smoothness EXTREME need of help
« Reply #9 on: November 12, 2009, 06:17:08 PM »
LOL I never even noticed the M01's ;D