Torque is required.
Because of the low cutting speeds typical 66m/min you need machines that have HIGH TORQUE at low revs.
Most machines do not have enough power at low revs, pick a machine that has a gearbox spindle that gives high poweer at low revs
I would find a Graziano (Italian) used lathe if you want to stay down the manual lathe route.
Quite simply the best. I used to operate Harrison alpha cnc/manual lathes, colchester tornado cnc lathes and graziano manual lathes. For manual work the grazzys were the best.
Try using chemi-mill quality sheet material. This material is designed for aircraft skins which have pockets chemically eroded into it and it resists warping much better.
I always used to machine just enough to break the skin on the first side holding the skins on a vacuum chuck, flip it and...
The size of the facemill is limited by the size of the spindle.
A 40# taper spindle would typically take a max 100mm/4" face mill. But as you increase the rpm and cnc routers typically run at 18,000 rpm I would suggest keeping the diameter of the cutter to about 20mm max. Balancing of the cutter...
Cost is the diference!
Waterjets are expensive to run. Typicaly 50HP pumps.
Garnet £200 or $400 american per metric ton and you will consume 1Kg every 2 minutes.
£40 for a "cheap" orifice made of saphire lasts 40 hours.
£40 for a "cheap" focusing tube lasts 50 hours.
£100 for a good focusing...
The sheets should be scratch free.
First thing audit supply of raw material from your supplier and make sure it is.
2nd make sure people handle it correctly no standing on it, walking on it and make sure it is packaged properly on bomb proof pallets.
3rd lasers do not scratch sheets make sure...
you must skim very small amount from first face
to break skin of ally.
Turn over and take deeper cut.
Turn over again and cut to finish size.
A vacuum chuck helps a lot!
It is I appreciate a ball ache but this method works.
regards
I take it the problem is the skin on the casting?
slow the revs
make sure machine has enough power at low revs could be you want to use a smaller cutter so the revs are higher at that cutting speed more torque may be then available.
If you are only profiling the .018" don't even bother with the vacuum.
Punch it out / laser cut it / waterjet cut it.
Require a milled finnish? leave 0.5mm /0.020" on the edges to clean up on a machine centre
bolt it down with service lugs you add to the profile and crop them off...
g70 does not support g41/g42 offsets
Make sure you have enough stock on the roughing cycle so that the finish cycle can remove it all.
Especially on tapers and circle moves.
The bigger the tool rad the more stock needed.
maybe the code is too rough.
I is the circle centre x axis
J is circle centre Y axis
N114 does not quote I value the machine may need this value quoted.
Is there a setting in the post to force out all values, best to always output them all?
If you substitute the I & J with R (quoting the correct...
I'm with mrainey on this one it sounds like you have not allowed enough distance before cutting the thread to allow the spindle to syncronise with the cross-slide.
Slow the spindle down if you cannot increase the air cutting.
Most cnc lathes have a constant they are constrained by in thread...
