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Author Topic: Kiran - Circle Wizard - cuts eliptical  (Read 2347 times)

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Kiran - Circle Wizard - cuts eliptical
« on: April 01, 2009, 11:29:03 AM »
200 step / rev
1/2 step mode
4000 steps per inch
Motors are tuned.

Strangeness indeed when I choose a tool smaller then 1/4 inch to cut a circle it cuts eliptical ... i have tried the code in cncsimulator and it performs a circle.  Here is the code ... any one have thoughts ?  It also cutting larger then what is in the wizard ... 1 inch diameter is like a 1 inch radius instead almost twice the size. 

1/4 inch tool

F400
G00 Z0.5
G00 X0.875 Y0.5
G00 Z0
G01 Z-0.04 F8
G02 X0.875 Y0.5 I-0.375 J0 F400
G00 Z0.5
G00 X0.875 Y0.5
G01 Z-0.05 F400
G01 Z-0.05 F8
G03 X0.875 Y0.5 I-0.375 J0 F400
G00 Z0.5
G00 X0.5 Y0.5
M30

1/8 tool

F400
G00 Z0.5
G00 X1.1875 Y0.75
G00 Z0
G01 Z-0.04 F8
G02 X1.1875 Y0.75 I-0.4375 J0 F400
G00 Z0.5
G00 X1.1875 Y0.75
G01 Z-0.05 F400
G01 Z-0.05 F8
G03 X1.1875 Y0.75 I-0.4375 J0 F400
G00 Z0.5
G00 X0.75 Y0.75
M30

1/16 tool

F400
G00 Z0.5
G00 X0.96875 Y0.5
G00 Z0
G01 Z-0.04 F8
G02 X0.96875 Y0.5 I-0.4688 J0 F400
G00 Z0.5
G00 X0.96875 Y0.5
G01 Z-0.05 F400
G01 Z-0.05 F8
G03 X0.96875 Y0.5 I-0.4688 J0 F400
G00 Z0.5
G00 X0.5 Y0.5
M30


Thanks
Peter

« Last Edit: April 01, 2009, 11:32:29 AM by nickle989 »

Offline Graham Waterworth

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Re: Kiran - Circle Wizard - cuts eliptical
« Reply #1 on: April 01, 2009, 04:34:09 PM »
If you enter this into the MDI screen how fare dose the axis move

G00 G91 X1.

Check that your steps per are set correctly  and that the scale DRO's are set to 1

Graham
Without engineers the world stops
Re: Kiran - Circle Wizard - cuts eliptical
« Reply #2 on: April 02, 2009, 08:21:39 PM »
Okay then ...

Tested the amount of travel in all directions ... 1 to 10 inchs in 1/4 and 1/2 increments in both the x and y axis ... no problem.

I did a power down power up reset before doing this.  All is fine and accurate to with in 1-2 thousands of an inch.  I ended up getting the addons and trying it with that it worked much better.  I repeated various sized circles and some came elongated after 2 passes egg shapped ... the y axis would go 2 as much and z would do the same ... I would have to power down and power up to get rid of the problem.  So when it happened somemore I then went into the motor tuning when an axis would go out of shape and ie. 4000 steps droped it to 2000 steps and it corrected it self until of course the machine was powered down.  What went kind funny is when I tuned the motors one time it actually moved them.  Perplexing to say the least.

I ended up using the testdriver.exe to see if that would do anything and up the speed from 25 to 65 ... it seems to maybe have corrected the issue.  I can now cut various sized circles and repeat the same lines without any problems.  I will try somemore tommorrow to make sure that I can repeat again and again until I start to acutually start milling some metal.

peter