Topics

1

General Mach Discussion / Am I loosing Steps, and what should I do

« on: July 07, 2016, 05:16:44 PM »

Hello All,

I thought I would restart this thread after a misunderstanding regarding my Mach 3 license which has now been resolved with Tweakie.


As I originally wrote, I seem to be experiencing an issue with my machine that results in it loosing its positioning.

As an example, I have made a video (see below link) in which I set the work offset zero at the surface of the work piece. I then rapidly move the axis around a little, and re position the cutter on the work piece surface. Only to find that it shows up as not being as Zero in Mach 3

https://www.youtube.com/watch?v=gR1-5u9HwIs

Just to give you some detail, the machine uses NEMA 34 Stepper motors, operated via a JNC-40M control board connected to a new PC via USB. All the electronics (Input Transformer, Control Board, Motor Drivers, etc) sit in the same enclosure, all close to each other.

From what I have read (as Tweakie pointed out), the JNC-40M controller has a pretty hit or miss success rate of being stable with Mach 3, so Im wondering if this is the cause of the problem?
Before I go buying a new control board, I guess I would like some feedback from you guys of if this seems to be a case of losing steps, and if there is anything specific I can check (maybe with the electronics such as feedback, etc)?

Any help would be greatly appreciated

Thanks

2

General Mach Discussion / Losing Zero

« on: November 14, 2015, 07:39:40 AM »

Hello All,

Can some one offer some help on an issue I seem to have

Basically, when set my zero positions, I then come to run a program and now and then (more times that not!) it seem to loose its zero positions. I've had a few cases where Z or Y have lost Zero and the tool has crashed in to the work piece.

Initially I though I might be cancelling or calling up an incorrect fixture offset in the G-code with G54, but even when I remove this from the safe line, it still happens

Any help would be greatly appreciated

Thanks

Rusty

3

General Mach Discussion / Changing Axis Orientation

« on: October 07, 2015, 06:43:50 PM »

Hi Everyone,

Firstly, thanks for having me on board the forum.

Not sure if this belongs in this sub forum, but here goes.

I have done some googling to see if I can find an answer to this, but the best I could find was to do with changing the direction of the homing.

Basically, My Mill currently homes in the right direction, I.E - Bottom left corner in X & Y axis. But as I move it in positive Y and X (based on conventional right hand rule) my X and Y value on the mach screen go negatively.

Is there a way of switching this to the currect convention

Many thanks

Rusty