Hello Guest it is August 04, 2021, 04:54:30 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - MojsterMiha

Pages: 1 2 3 4 5 6 7 »
1
Mach Screens / Re: FRO Slider
« on: March 07, 2021, 11:03:07 AM »
Hello

I know this is very old post... but, perhaps someone has solve this issue?

I have the same problem... what ever value I enter as slider max it goes over 250...

Any solution...?

Thanks

2
Finally succeeded to upgrade MACH3 to .063 version.

It works great  :)
The threads are as they actually should be.
Thank you all for your patience and all your help.

3
Thanks
I will do it. 
I have used an old computer with already installed and licensed MACH3 - removed from old milling machine.
On milling machine it was all OK and I did not upgrade MACH3 - my bad..

Thanks again

4
Thanks

I will try and report the result ..

5
Thanks

Sorry, I'm not real lathe user... I deal more with milling and, above all, with the retrofitting of machines.
I assume there is a difference in moving along the X axis.
I have a problem with the Z-axis ...

To this day, I have not encountered such problems ...

6
Hello

Please, could you explain to me what difference you mean Diameter mode vs radius mode?
Where/how I can set this modes?
I'm running  R3.043.022

Thanks

7
Dear Graham, RICH

Thank you for your patience

In my previous post I sent the picture of thread cut in multiple passes in a plastic work piece - each pass not more than 0,1mm
I read all the thread cutting instructions, but unfortunately I didn't find the answer to the unusual doing of the machine / Mach3 in my case.

I have tried also with 50 rpm, 100,... it is the same. Spindle is driven by 7,5 kW motor and gearbox. Spindle speed is constant - I have measured it (out of Mach3) also with encoder and digital tachometer. It could not be a reason to slow down feed rate.

Z axis moves smoothly also by 5 times higher feedrate - when not threading. By all other work both axis moves with no problem at much higher feedrate.

I am attaching a picture of the thread - just one pass. Threading in this pictures was started 5mm before workpiece and thread pitch is quite constant, because it was already reduced to 1/2 (before touching workpiece)
If I start treading close to workpiece, thread looks like in my previous photo - pitch is reduced from programmed to 1/2 of programmed.

It is hard to explaine...I have  made a short video...but is too big to upload it.

From my previous post: "I have noticed under Spindle calibration menu one window for index signal "zero if one/rew". There is "1" but I can't change this value." 
Could this creates an issue?

8
Dear Graham

I don't know what your answer is supposed to mean
I just wrote my opinion. If the programmed step (feed rate) is 2mm / rew, and Mach works 1mm / rew, then there are probably some other settings ...
This is the same also without workpiece.

And a scratch test.... the same as pictures in my previous post .... its cut in a piece of plastic, so no (or near zero) cutting force.

9
On my opinion there is something wrong in MACH3 settings.

Mach does not follow the programmed thread pitch.
If programmed pitch is 2mm, treading starts with F= 2mm/rew, but after ~ 2mm of moving this changes to F= 1mm/rew.
Spindle speed is stable and does not change. Feedrate/moving is not smooth but vibrating.
Index signal is one/turn - I tried with short time signal, longer signal, different index debounce settings... nothing change.
I have noticed under Spindle calibration menu one window for index signal "zero if one/rew". There is "1" but I can't change this value.
Could this be a reason for wrong pitch - wrong F/rew?

Thanks


10
Hello

The spindle is driven by a 7.5 kw motor via a gear transmission. Speed is stable, also rpm in Mach3 are stable during threading.
Thread in the pictures was made with multiple passes.
I also can't figure it out why feedrate in Mach3 showes 0,75 mm/turn if programmed pitch is 1,5mm
This feedrate is also not stable despite the fact that the spindle speed is constant.

I’m slowly getting desperate already, as I’ve invested a lot in reworking the machine, and now I can’t cut the thread.

Any advice is welcome ...
Thanks




Pages: 1 2 3 4 5 6 7 »