Messages

1

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 25, 2009, 09:56:38 AM »

Hi Daniel, thanks I tried you’re your test procedure and it show that every time I moved the axis there is 0.0009 accumulating shift in the plus and minus direction that is not showing up on the DRO’s.

Using different control software and using the test  procedure showed no problem.

I did notice that in ports pins config. under mill options that Mach3 is not allowing me to select No Home Switch. I do not have the Homes enabled, is there another way to enable the selection?

If anyone knows please let me know, thanks again and best regards 

2

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 21, 2009, 12:43:10 PM »

Hi, thank you I greatly appreciate all the help that I received in trying to solve this problem.
Thanks again to all the members and best regards

3

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 20, 2009, 10:31:45 PM »

Hi, KCAM is not the answer I am looking. It only shows that the the problem is not with steps / unit. I paid to use Mach3.
I am still looking for solution to the accumulating shift problem or is there away to get a refund?

4

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 20, 2009, 09:15:04 AM »

Hi, I down loaded a free version of KCAM 4 set the steps per inch to 1112 and ran  G code:
G0 X1
G28

and repeated code many times and the dial indicator showed no error.

The problem is not with the Zenbot I am missing a setting some where in Mach 3 that is causing the accumulating positive shift of 0.0015 that is not showing up on DRO's.  How do can tell what version Mach3 I have. Maybe I downloaded the wrong version. If anyone knows please let me know. Best regards

5

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 20, 2009, 05:56:13 AM »

Hi, the machine purchased is located at

http://www.zenbotcnc.com/merchant2/merchant.mvc?Screen=PROD&Store_Code=zenbot&Product_Code=zenbot1216&Category_Code=Products

I do not have any other information on the control box.

When I tried the calibration axis feature to change the steps per inch, the circles would cut as ovals.

6

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 19, 2009, 07:00:39 PM »

Hope this is the correct one

7

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 19, 2009, 12:08:19 PM »

Hi,

“OK set velocity to 30 and acceleration to 5 and try again.”

I did the suggested resets and there is still a problem.

“You still have not told us your driver, power supply and break out board setup.”

The control box and power supply came with the Zenbot.

“Explain how you are measuring the 1.5 thou discrepancy?”

Method for measurement:
1. I secure  a heavy metal plate to the tooling bed.
2. Attach dial indicator with magnetic base to plate.
3. Home all axis and zero display.
4. jog to dial indicator G0 X2,Y2,Z-2 and zero the indicator
5. Home axis G28
6. Jog back to dial indicator G0 X2,Y2,Z-2
7. This is where dial indicator starts showing the accumulating positive shift of +0.0015
8 repeat steps 5 and 6 the error increases a constant +0.0015 after each repeat and the error does not show up on the DRO’s

If I use the same method but replace G28 with G28.1 X-0.0015 Y-0.0015 Z0.0015 then no error occurs. 

I did notice that when I use G28.1 the DRO’s do not reset to zero but reset to + or - 0.0009. They should reset to zero after a G28.1 command. That is why I had to reset the DRO’s to zero so many times within the macro.



“Post your XML.”

I posted the XML and I am continuing to review the config Mach3 pdf . Thanks again for efforts and best regards.

8

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 18, 2009, 09:20:14 PM »

Hi, I tried the suggestion and there is still a accumulating positive shift of 0.0015 . 

9

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 17, 2009, 10:27:31 AM »

Hi, I posted a jpeg of the tuning page. If this is not the info you are requesting please let me know where I can find and set it.
I did try lower setting.

10

Share Your GCode / Re: Corrected problem of positive shift not being shown on DRO's

« on: April 16, 2009, 01:51:18 PM »

Hi, the step per unit are 1112 as recommended by the manufacturer. After I use G-code G28.1 X Y or Z 0.0015  the DRO‘s do not reset to zero, but reset a + or - 0.0009.. 
I am trying to look beyond the macro solution.

 When I tried the calibration axis feature the circles would cut as ovals. Motor tuning are set to spec’s. I checked the machine for possible mechanical issues and was not able to find any. When I cut a hole for a bearing on a project it is very accurate. The problem only occurs after movement to the next cut location.

 The dial indicator I use for testing measures to 0.0005. The control box came with the Zenbot, if it was missing pulses would it travel less and stop short.?

I really appreciate your efforts and will continue to implement your suggestion to try to find a solution. Thanks again and best regards.