DNM500/600 are very good machines, wich controller would You preffer (becouse You can buy it with Siemens, Fanuc or Heidenhain)?

very simple, go for it

there can be some geometry away from your desired part, so if you can not find it try to save only geometry that is around center, as save some... or click delete window in the area that look like empty

if that is very offten and long term I would consider parametric programing, that would also save time to draw new parts, that will make some expences but in long term is very useful

gun drill , for dia 4mm yuo can use 4400 rpm and feed of 35 mm/min, shoul work for 3.4 also , but there will stay problem, becouse you will need high preasure through coolant

I do that with subprograms, so main in Mazatrol, and only call ISO (.EIA) as sub

are you mirroring toolpaths or geometry? dont see why problem is if toolpaths are goinng from left to right if tool compesation is ok enable reverse toolpath in mirror dialog box, if you are mirorring toolpaths

Try, Analyze-> Test Surfaces and Solids->Curvature

It works fine for me, just make geometry on another level, no specific color is needed, but -insert must be smaller then holder for example: Dok14.doc

ok, but where is your start point in X direction for G77 , X4.? diametar of yor stock is?

G97 S3 ,why? it is 3rpm, is it for main spindle? it shold stoped not turnning, is it rpm for live tool? just want to help. with C axis you could try with multi passes or depth cuts, but yor position is in X4. I am not sure it is OK. seem to me that you need one more X position, start position, could you attach file or something

there a few things that are missing or confusing in this program, first of all G97 S3 - it is 3 rpm??? second- you should have G21 or G20, inch or metric values in start of program (just in case) third- is it G90 or G91, absolute or increnental move fourth- there is no value for feed rate at all fiveth-it shold be great to have sone linear move in feed rate before starting any of circular or simillar motin. or aproaching stock part (it is not necesary but it can be very usfull for not stroke or if you run first part in single block mode)e.g. N140 G01 Z-1.849 F100. or F0.01)

Sure it is important to see the spcification requirements, if you just engrave numbers as such good tool for that is 60 degree tool with small r on tip e.g. 0.3 (metric values).