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Offline Hood

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Re: New Mill
« Reply #10 on: July 24, 2010, 11:26:04 AM »
Ok so its steppers now have a look at Config menu then Motor Tuning and see what steps per unit are for X Y and Z

Hod
Re: New Mill
« Reply #11 on: July 24, 2010, 11:35:32 AM »
This mill is a Syil X4 Standard, the .xml file came with the machine.

Mach3:
Config>Motor Tuning

Axis     Stepper    Volocity     Acceleration
  X       10160       150               20
  Y       10160       150               20
  Z       10160       100.02            8
Re: New Mill
« Reply #12 on: July 24, 2010, 11:37:29 AM »
Opps, Steps Per not Stepper

This mill is a Syil X4 Standard, the .xml file came with the machine.

Mach3:
Config>Motor Tuning

Axis     Steps per    Volocity     Acceleration
  X        10160        150               20
  Y        10160        150               20
  Z        10160        100.02            8

Offline Hood

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Re: New Mill
« Reply #13 on: July 24, 2010, 02:07:40 PM »
Ok well that is not the issue, I was thinking maybe your steps per unit were close to 0.001 and that it was the nature of microstepping that was giving you the error but as your resolution is ten times greater then I dont think that is the case.

Have you checked the  rigidity of the machine or in other words how much play is there in the slides, especially the Z axis.
Hood
Re: New Mill
« Reply #14 on: July 24, 2010, 02:18:22 PM »
I can not feel any looseness in the gibs, I can see that it does move a little if I look out at the end of the slide, I think it is tight...

Though I can not find it again, I thought I read somewhere that Mach3 could be adjusted for accuracy.
Re: New Mill
« Reply #15 on: July 24, 2010, 02:41:19 PM »
All:

Think I found the answer and will share it with everyone...

Improved Mach 3 Axis Calibration Video
http://www.youtube.com/watch?v=XkO5tc-jSxw

Kendall Miller
Fun Dimensional, Inc.
Leander, Texas
USA

Offline Hood

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Re: New Mill
« Reply #16 on: July 24, 2010, 03:16:29 PM »
Kendall, Rich already told you about the axis calibration a few posts back ;)

Hood

Offline RICH

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Re: New Mill
« Reply #17 on: July 24, 2010, 03:19:38 PM »
Kendall,
Yes you can make adjustments and you reply #15 is the axis calibration mentioned in one of my replies.

I believe you have 5mm ball screws:

200 steps / rev x 10 micro steps x 5.07614 screw turns per inch= 10152.28 steps per inch setting

10160-10152 = 8 difference
1/10152= approx .0001" movement per step....  so 8 x .0001"= say .001" difference if 10160 was used

-------------------------------------
So that is the calculated steps, but, life is not exactly perfect.
So try 10152
"     "    10146
"     "    10140  and see what the DRO is compared to measured.

What the calibration feature does is the equivilant and i will remark that the affect of small changes in steps per unit are not linear.
Please note that there is no such thing as "zero backlash", may be small but you will have some....!

---------------------------------------
Once the steps per unit are set and movement agrees with DRO. Then do some machining and see how it all goes.

You can change the velocity. For instance, see where the motors start to skip, say they skip at 180, then reduce your velocity to
70% of that and use 126 ( that gives you some head room for machining ) and you may want to fool with the accel in a similar manner.

Hope the above is more helpfull,
RICH
Re: New Mill
« Reply #18 on: July 24, 2010, 05:02:49 PM »
Sorry if I am a dumb A55, I only have had this machine a few days and Mach3 a few more days prior to that...  Maybe after I have played with it enough I will start to understand the things that ya'all take for granted that I should already know...

Bet I could of figured it out if anyone would of mentioned [Alt-6], look above the [Reset] icon dummy, the wizard does it for you...  X is now set, it ended up @ 10167.5 (7.5 more steps per inch), working on Y...

Sunday Church (got a lot of thanks to give, and a lot of praying for help to do), Monday, I will be working on the flood coolant pump that came from Syil 'not installed' and with no instructions!  Bet I will be just as dumb with this issue, with what I have read about over tightening wires will break the board, under tightening it will make it the machine fail, just can't wait to get into this project...

Thanks for all the help, you
made me dig into the basics,
I'm a more educated now,
Ken

Offline Hood

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Re: New Mill
« Reply #19 on: July 24, 2010, 05:08:39 PM »
Ha ha dont worry about it, we all started at the beginning . Problem with getting a machine thats all set up for you when you buy it is you dont need to start at the basics unless there is an issue.
If you have a chance have a look at the videos, they give some good explanations of the basic  things and often it sinks in better than reading the manual.
Hood