I am writing a vlisp program to read the dimension entities in a drawing and write them to a text file. I use ssget to get the dims, then use entget and assoc 42 inside a while loop to read & write the dims. The program works fine for reading the basic dimensions. But the tolerances are not...
I need to write a VLISP routine which will load a graphic image (.wmf) in the ACAD graphics screen and then move this object relative to an open drawing. Please help me with answers to the following:
1) what are the different ways to load an image without its associated frame?
2)Is there any...
We have a requirement to machine (Turning) Tungsten. Has anybody in this forum machined Tungsten? If so, I'll be grateful if you can share your experience with me.
Is there a standard to be used when specifying bolt holes for metric screw threads? For example do I specify a hole dia of 6.3mm, 6.4mm or 6.5mm for assembling M6 coarse thread bolts? Does anybody know where I can get this information?
There is a lot of speculation about EDMing Al.Alloys. Shop floors resist doing EDM on Al.Alloys citing reasons of filter damage etc. Can somebody throw some light into this?
Are all non-linear interpolation schemes (like circular, helical, NURBS, etc) approximated with lines by all CNC controls? For example, a circle by means of several chords so that linear interpolation can be done internally to approximate the circle within some tolerance limits? Are NURBS curves...
we are planning to retrofit our old Vertical Turn-Mill with Siemens 840D. The mill spindle of this machine gives only 1000 RPM (max) and so we have a problem with cutting speeds (and feeds). We would like to replace this with a full CNC B-axis add-on to the spindle. This accessory is made by...
We are machining lot of AA2014 & 2024 Aluminium Alloys in our CNC mills - but at spindle speeds less than 5000RPM and with flood coolant. We are planning to procure a high spped spindle attachment for speeding up production. Has anybody machined these alloys using high speed cutting? If so at...
What is the repeatability assured by AT3 class tooling?
What are the other standards in vogue regarding tooling for CNC Machines. Is there anyhting better than AT3?
Thanks
rakes
I am writing an AutoLISP program to read a text file and write the whole text on to AutoCAD graphics screen exactly as it would've appeared in the text file. Here is the code: (setq f1 (open f_name "r"))
(setq str 1)
(setq block (read-line f1))
(while (/= str nil)
(setq...
We are in the process of evaluating CNC machine-tools in terms of its positioning accuracy and repeatability. Unfortunately different manufacturers quote different standards like VDI/DGQ 3441, DIN/ISO 230-2 97 etc. Can anyone tell me or point me to a web site where I can have a look at how these...
I am writing a program in AutoLISP which reads geometry created in AutoCAD and processes information regarding start point of line etc, for output to a file. my problem is in using "=" function. I read start angle of an arc using "entget" and "assoc" functions. But...
We are planning to buy a 5-axis CAM Software. Currently Unigraphics is actively in our minds. Can anyone compare this program with other 5-axis CAM programs in the market?
