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Messages - CES

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1
Oh, I forgot, 3.1Nm motors.

2
RICH,
  The 24V, 4 wire motors are connected to the ball screw with a spider coupler ($15 from Amazon) but mine came in a kit. The ball screw is a Thomson and the spider coupling is red or orange but I cant find them on the web and I can't read the text on the mounted units but a picture is attached.

When I calibrated the axis, the 10000 came down to 9999 and change. They are as accurate as I can get them. Much less than 0.0005 inch over 1 inch movement. The Z axis is the worst at 0.0004 in Up direction and 0.0002 in down direction over 1 inch. I think the up direction is pulling a lot of weight as the ball screw in on the side of the column.

The X and Y axis both calibrated to 0.0001 in both directions.

Calibrations of X, Y and Z were done using Mach3 calibrate function over 1.000 inch. The Backlash is set to very low values to give the correct response.

3
General Mach Discussion / Re: Z 0 being reset in G-Code
« on: December 10, 2018, 04:43:13 PM »
ger21 or Gerry,

  That was it. I removed the G43 from the file and it is now cutting. I checked the .pst file and it has been on from day 1 so I wonder why it started taking effect.

To remove this from future nc files, do I change the quoted G43 with double quotes? ""

Thanks Gerry,

CES

4
Tweakie.CNC,
  Many posts are being re-posted due to the Search function being broken. Search should not be concerned with layout of DB. Advanced Search should search all threads. Search should search all threads in current topic.

A little cranky is a misnomer, Broken is accurate.

CES

5
General Mach Discussion / Re: Z 0 being reset in G-Code
« on: December 08, 2018, 01:06:15 PM »
I am not making the change to Z 0, it is occurring in G-code or Mach3.

6
Not sure why the picture was blown up to such a degree. Select it and you will see a smaller view.

7
Hi Rich,

  I have Nema 24, 3.1Nm Steppers on all three axis connected to spider couplings and 5 terns per inch ball screws. I have attached pictures of the Coupling on the Z axis but all axis are the same. I've also attached a picture of my Mill, a Grizzly G8689 CNC controlled using a GECKO G540 4 axis controller and Mach3 licensed.

The flood is under construction... also the home switches for X and Y are under construction.

I've searched for the original manufacturer of the parts but can't find them. Out-of-Business or my migraines are getting in the way.

BTW - I have all axis calibrated to less then 0.0005 in all directions except Z in Up direction (I am now thinking the Z is under a heavy load due to the weight of the head). The direction of Z that makes a difference for me is Down which is good. Up is not nearly as good, something like 10X the down accuracy.

8
General Mach Discussion / Z 0 being reset in G-Code
« on: December 06, 2018, 01:30:28 PM »
 ???
I have started noticing that when I run my G-Code, the first Z action is to move Z up. Then Z zero is SET to 0, not to G54 Z zero. I end up cutting air.
I'm on a Grizzly G8689 CNC running Mach3.

I made one part with the attached code then this issue started.
Reload Mach3?

I think others have posted this but Search is not working so I can't find the threads.

Need help.
CES

9
Sorry, if you can't post what was asked or take some simple advice  won't be able to help you.

Have  Happy Holiday and good luck,

RICH


Hi Rich,

  I have posted all requested information except a video of the movement (I don't know how to post VERY large files).

Have a great holiday season yourself.
CES

10
Hi,
additionally I notice you are using incremental moves. What is your step per unit vale for the Z axis?

Craig
JoeAverage,
  My single motor movement is 0.0001 inch on all axis. That is the best I can get out of this machine and seems good enough for the parts I make.


I compromised on the calibration of my Z axis. Going up can be 0.0003 different than doing down as long as the down direction is < 0.0002. All axis are not calibrated to less than 1/5 of by 0.0005 dial. 1 inch or 0.015 inch, the return is to zero.

The up direction has to move the weight of the head, spindle, motor, Collette and bit so I see how it would put a lot of stress on parts that would not have the same stress in down direction. I do not have a zero weight Head.

Thanks, all how commented.

p.s. my machine is slow for a CNC. In the next week, I'll turn up the acceleration.

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