Hello friends from the forum.
I bought in april this year a 5 axis cnc machine. the machine is build in 2002 with only 780 hours on the counter.
It has a Siemens 840d controller with NCU 573.3.
Only one of this type is build, the company who has made this machine also has gone bankrupt on this one.
Because the bankrupcy the plc never completed like the way it must be completed.
The last tweaks are done in a hurry so there where some problems.
I had a Siemens service engineer for more then a week (lot of money) to complete it as good as possible.
I made the first chips last weeks and the machine gives a nice surface and is fun to work with.
But there are also 2 issues i can't solve.
Rigid tapping with Cycle 84 breaks the thread.
The machine does have a encoder on the spindle so Cycle 84 must be no problem.
I try the tapping cycle in plastic so the tap won't break.
But the thread isn't like it must be.
I think it goes wrong when the spindle goes from CW to CCW then the Z axis doesn't slow down i think.
I use the tapping cycle so the programming part can't be wrong the machine also doesn't come with a error.
Are there some things i can change in the parameters from the machine?
And when i program a large Cam file with a lot of smal lines there are also problems.
When i use G60 then the machine starts Jerking, but that is normal i think because it is a exact stop.
So then i try G64 then the jerking stops but the surface is very bad.
There are differences in hight more then 0.5mm
Also tried G641 Adis with different numbers but also no jerking but a very bad surface.
I'm stuck with this one because i have only worked with Heidenhain and Fanuc.
Siemens is new for me so i hope someone can help me with this problems.
In fanuc i can use ai nano but in siemens you have a lot of different things to do.
Also don't know if there is a parameter that must be changed.
I don't have Cycle 832 on my machine is there a possibilty to install it?
Sorry for my bad English hope some one can help, here in Holland the CNC forum is very tiny.
Kind regards Branko