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Messages - jevs

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21
I also calibrated mine with an indicator before doing the Mach 4 calibrations. I am just not sure yet why I get the discrepancy when edge finding, yet it measures a bore right on (using ring gage for cal and checking).

22
I was thinking that the error could be due to the probe. My Wildhorse probe has a very stiff spring. It appears that the stiffness varies depending on the angle to the 3 axis of the probe. The stiffness appears to be strong enough to cause the probe shaft to deflect slightly. I never actually measured it though.



Wouldn't the calibration account for the flex (if you don't rotate it)? I have a mark on mine so I put it in the same spot each time. It is also in a dedicated collet tool holder. Since it calibrates in X and Y at that position, you would think they would be pretty much right on if always used in that position?

23
Right now I am not sure what it is. I am trying to narrow down and understand what Mach 4 is doing better.

It is strange that it reads a bore within .0001, but has trouble with edge finding accurately. If anyone has some suggestions on methodically narrowing it down to where the issue is that would be great.

At this point I am not sure if it is in the probe, the machine (the amount of real backlash), the motion controller (ESS), or something else. 

I do have a second wild horse probe that is being used as a tool setter. I hate to mess with it because I have it all dialed in and the height set. If I don't figure something else out, I guess I could set that one up as a 3D probe and see how it differs in results.

Or, I could buy another probe that might be better than a Wildhorse and try that, but I am not sure what would be better and within a reasonable price frame?
 


24
No. Same measurements at 90.  (Without recalibrating at 90)

25
Not sure if this helps, but after many cals and tweaking, the Y axis always comes out with more offset.
Here are the current calibrated settings from the machine.ini (which have been about the same any time I have ran through the cal and re-adusted the centering of the probe tip etc.).

XOffset=-0.000213
YOffset=-0.001520
Radius=0.056210 (actual radius of tip is .0625)

I do wonder how/if backlash amount using compensation affect this?



26
I am using a Wildhorse Econoprobe
I adjust the tip with a dial indicator and get it pretty much dead on.
Then I put a new 1.0937" ring gage in the vice.
With a dial indicator in a collet, I center the ring gauge up and zero out x and Y.
Switch to the probe.
Go through the calibrate xy offset and radius.
After that I measure the bore of the ring gauge and it measures right on the money at 1.0937. A couple times I got 1.0936 after calibrating, but this is still excellent I think.

Next I probe the X edge and then load the edge finder and I was getting within .0001 of each other which is again really good.

Then I try to do the Y edge and keep getting about .0036 difference from the probe and the edge finder.

Not sure why this is happening, but I am not sure I can trust the probe or use it with it being this far off.


27
Mach4 General Discussion / Re: New mach4 ERROR's after install
« on: October 26, 2019, 10:36:03 PM »
so you have ESS v250 and Mach4 v4322 ?

I just installed both of those and mine boots up fine. On a mill...

28
Mach4 General Discussion / Re: New mach4 ERROR's after install
« on: October 26, 2019, 08:40:20 PM »
Are you using an ESS?

Check version compatibility. I got similar issues when I tried to go to one of the newest Mach versions from the FTP page. The current ESS compiles and works with one that is not the newest.

I am now using
Mach 4.2.0.4310 & ESS v248

I believe this combo was tested to compile by Warp9. A newer version of Mach gave me errors at bootup with V248 like you see.

https://warp9td.com/index.php/gettingstarted/setting-up-the-smoothstepper-and-mach4#MachFourInitialESS_NEW_PLUGIN

STEP 3

However....I see now they have ESS Mach4 Plugin, build 250. (compiled against Mach4 v4322)...I just updated everything a few days ago LOL. Looks like I will be doing it again.

29
Am I missing this somewhere, or is it really just this painful to edit screens?


30
After contacting Artsoft and Warp 9 the consensus seems to be that the soft limits have to be set to something negative of the 0,0 position. I have set my x and y soft limits to -.0050 and took that extra code back out.

From Warp 9:
The ESS does allow for the possibility of both +0.0 and -0.0 This arises from the way that the SmoothStepper keeps track of the direction it is (or was last) going in, which can create a -0.0 This ability to track the direction of last movement along with the position helps with backlash compensation and a few other motion related details. But the ESS is working with the position in terms of integer steps. What we report to Mach4 is converted from integer steps to a double precision float.

My initial assumption would be that Mach is comparing -0.0 to 0.0 and that would likely result in a value of less than.. Why? Rounding - I am guessing that the number reported is something like -0.0000000001 due to the floating point conversion, This isn't reflecting that the SmoothStepper's position is off, since the integer steps are still true, but rather the mathematical issues of computer based floating point numbers.

Setting your Y soft limit to -0.01 should fix the issue.

From Artsoft:
I ran into this issue yesterday and the guy was homing too close to his soft limits, I can modify your ref all home function to see if moving the axis further away from the limits helps any, otherwise I'd suggest that your soft limits shouldn't be so close to your homing location (assuming they are).
I will however try to replicate this issue on a machine we have here using your profile.
Best Regards,

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