Topics

1

General Mach Discussion / Step losses in specific displacement

« on: July 30, 2007, 04:42:05 PM »

Hello,

I have a problem on my CNC machine that I couldn't solve for the moment.
With a certain combination of X and Y movements, I sometimes loose steps on the Y axis. It occures during a G0 movement and always on the same displacement (same combination of X and Y axis). The G0 speed is set lower than the maximum speed capacity of my machine and there is no mechanical problem.
It seems to have link with the frequency generated by this particular movement combination.
Does anybody have a clue how to solve this problem ?

Thanks
Jean-Louis

2

General Mach Discussion / Jerked operation when executing tool change macro

« on: September 03, 2006, 06:34:19 PM »

Hi,

Few days ago I tried to run a tool change macro on my machine (see topic : http://machsupport.com/forum/index.php?topic=1100.0) but there was a lot of interuption on all the axis movements.
When I execute the macro step by step, everything runs fine and the problem occurs only when launching the full macro.
My first thoughts were that my computer was not enough powerful despite a satisfactory operation until now (PII - 300 MHz - 128 k RAM) but today I had to do some pockets. I used the pocket wizard but as it puts an M6 code when generating the G code, to bypass this problem, I tried to use the "Ignore tool change" button in the "Setting" screen. The tool change macro was ignored but I still had a jerked operation during the whole milling cycle.
Then I edited the G code and simply erased the M6 command. Once I did that, I found back a very smooth operation.
Does anyone have an idea of what could be the problem ?
I'm sure having a more powerful CPU would definitely be better however I wouldn't like to spend money in a new one if it doesn't solve the problem.

Thanks
Jean-Louis

3

LazyCam (Beta) / Lazy Cam : splines and link points

« on: April 30, 2006, 08:57:08 AM »

Hello everybody,

I have two questions regarding Lazy Cam functions :

1- when importing in LC a dxf that includes splines (made with Autocad), LC seems not to be able to manage splines and then ignore them. I tried to explode my drawing in Autocad first but the result is still the same.
Is there a specific method to allow splines to be imported in LC or is it simply impossible ?

2- when cutting soft materials (wood or foam for instance), link points are usually necessary to prevent the parts from moving at the end of the cutting process (i.e. some small areas that mustn't be cut to keep the part attached to the material sheet).
Is this function included in LC or shall I include theses points in the CAD drawing ?

Thanks for your help
Jean-Louis