Messages

11

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: December 04, 2018, 09:52:41 AM »

I found that my X axis is doing the same but the cause is the X-Axis Screw nut. I guess it has become loose. The Z axis has a screw nut of sorts, supplied by the kit manufacturer with the CNC kit. The Z axis nut is very secure and can't be the issue. I'll set down the acceleration and put up with the sluggish response for the calibration of Backlash and steps per inch, as requested by the commenters. My pulse width will need to be modified to allow for the sluggishness of the axis. Can anyone post their X, Y or Z calibration screen from Mach3?

Thanks,

12

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: December 04, 2018, 12:21:49 AM »

Hi Rich, the calibration value from Mach3 is for my X and Y axis is 10027.*********x and 10025.*********x so the Z value will be very close. I am not concerned about the 10000 value. What I am concerned about is the fact that movement in one direction is not the same as movement in the other.

13

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: December 03, 2018, 07:03:35 PM »

ZASto,

  Too low acceleration causes lost steps or sluggish steps and lost steps. The high acceleration seems good on all three axis giving around 0.0001 inch per step. When lowered, the movement is not even and is sluggish.

14

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: December 03, 2018, 04:18:46 PM »

Hi TPS,

  Any setting less than 10000 steps per inch and I get no movement or completely incorrect movement.

NEMA 23 steppers on all axis with 5 TPI zero backlash ball screws. Doing the math, I get 0.0017 inch per step but in Mach3 is can see 0.0001 on a 0.0005 per tick dial indicator. I should get 5 steps per tick and I do and 1 inch is close to correct.

I tried setting the steps per inch to 100 and my DRO moved 100 inches before table moved 0.01 inch showing 10000 is correct (My table is 15 inches in X, 4.3 in Y and 9 in Z).

CES

15

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: December 03, 2018, 01:09:14 PM »

The settings are as follows:
Steps per: 10000
Velocity (inch): 15
Acceleration (inch): 19
Step Pulse: 2
Direction Pulse: 1
G's result is 0.0492136

This gives me 1 axis motor movement. That is I push the Page Down button ones and I get the motor movement for 1 increment

16

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: December 01, 2018, 11:16:01 AM »

Min step is 0.0001 from motor to bed/head.

17

General Mach Discussion / Re: Movement of Z axis is great in down direction but is incorrect in Up direction

« on: November 29, 2018, 06:39:44 PM »

Thanks JoeAverage,
  Thats what I was doing except 0.1 inch, so:
G1 G91 Z-0.1
Z0.1
Z-0.1
Z0.1
Z-0.1
The movements in negative direction are spot on but positive direction is off. Rather then 0.1, I get 0.097
So DRO's read:
-0.100
0.003 Reset to 0.000
-0.1
0.003, Reset to 0.000
...
I checked backlash, it is close to 0.0008 (about as close as I can get it to 0.0005 which is the accuracy of the dial indicator.
I'll check again but thanks for the reply.

18

General Mach Discussion / Movement of Z axis is great in down direction but is incorrect in Up direction

« on: November 29, 2018, 03:33:33 PM »

Hi Everyone,

  Search is broken as are external links into the database so I'm posting this thread.

I noticed that my Grizzly Mini Mill X axis was a little off in -X and +X. So I decided to re-calibrate the Mill. Z axis gives -.01 inch over .1 inch in Up direction but is almost spot on in down direction. I can't find a setting for forward versus reverse movement in Mach3.

Can anyone drive me in the correct direction?

Thanks,
CES

19

General Mach Discussion / Re: This Froum Search Error .... Help please

« on: November 29, 2018, 03:26:49 PM »

This Forum is useless right now. Might as well switch to some other forum. I guess they are trying to get people to stop using their service.

20

Mach4 General Discussion / Re: New Forum!

« on: November 29, 2018, 12:39:27 PM »

My main issue at present is the fact that the Search function is disabled due to the search not finding the Dictionary. This means that no serach of the entire ArtSoft database can be done. Please fix this!