Wrong cut

[driftspin]

The cause of my problem can be the high noise made by the VDF. Probably I'm losing steps (when high cutting force), but I'm not sure about it.

Any idea?

THX
Stefan

Hi Stefan,

If you think losing steps is the cause,

Have the spindle return to a known position after cutting.

Setup a dti there.

Run the program return to that position and check for zero on the dti.


Grtz. Bert.




Verstuurd vanaf mijn SM-A320FL met Tapatalk

[cncnescu]

Hi Stefan,

If you think losing steps is the cause,

Have the spindle return to a known position after cutting.

Setup a dti there.

Run the program return to that position and check for zero on the dti.


Grtz. Bert.




Verstuurd vanaf mijn SM-A320FL met Tapatalk

Yes, it will return to the position, so it's not the noise.

[cncnescu]

It was from the cutter. When I changed to a new one(3.175x9mm) the situation improved to 40mmx39.95mm.Now I have to find a 22 mm cuter that will not deflect so much because the 9mm that works it's too short for what I want to cut

[cncnescu]

Bad news!!... Yesterday I made a mistake. The cutter was not 3.175 but 3mm. After changing in the Estlcam the cutter diameter to 3mm (the real one) I get again wrong dimension.This cutter it's 9mm long so the deflection is minimum at 1000mm/min.
I really don't understand what is happening.

[driftspin]

Yes, it will return to the position, so it's not the noise.

So this also rules out reversed polarity problems... right?


If you are convinced the total combined rigidity/flex cant be the problem....


You can try with a 6mm cutter with a lot less flex..



Grtz Bert.



Verstuurd vanaf mijn SM-A320FL met Tapatalk

[cncnescu]

Today I discovered that my VDF was set on CCW rotation and the cutter used for MDF was a right hand one. After changing to CW on MDF I get the right dimension.
However on the wood plate on a 40x40 square it's all perfect, but when I switched to a bigger 80x80 square I get again wrong dimensions 80x79.8.
Normally it should work also on a bigger square but at least half of the issue was solved.

[Dave_stoke]

Today I discovered that my VDF was set on CCW rotation and the cutter used for MDF was a right hand one. After changing to CW on MDF I get the right dimension.
However on the wood plate on a 40x40 square it's all perfect, but when I switched to a bigger 80x80 square I get again wrong dimensions 80x79.8.
Normally it should work also on a bigger square but at least half of the issue was solved.

It isn't hitting soft limits and closing down on that axis?

Sent from my F8331 using Tapatalk

[magicniner]

With such a basic error as running your spindle backwards I suggest you run through all your settings and calculations again and check X, Y and Z travel in several areas with a dial guage to ensure your calibration and and other assumptions are correct.