Here is a list of all the postings geoff adams has made in our forums. Click on a thread name to jump to the thread.
|Thread: Tormach style tool holders|
I have a tormach pc1100 and have made my own toolholders in the past to fit the standard collet what info do you need only to happy to help
|Thread: Climb Milling any implications|
hi Chris if you climb mill on a conventional mill it will drag the work into the cutter depending how much backlash you have in the leadscrews upcutting will push the work away .it is recommend to upcut on conventional mills.
My Grandad was in the royal flying corps before it was the raf the man in the back dropping the bombs by hand he never talked about it in the second world war was a fire warden in london never new till his funeral
my grandma had her hair ripped out on a pillar drill in the war
Edited By geoff adams on 19/09/2020 15:28:59
Edited By geoff adams on 19/09/2020 15:33:45
|Thread: Is this a plug tap|
plus one grind it flat
|Thread: CNC dedicated mill or CNC converted mill?|
many a time i have sat with a cnc mill doing nothing costing i dont no what and production getting behind while QA drawing office and planning argue what is practical in the real world looked good on paper is the tolerance needed can it be achieved +- 002 from cast faces ok today you can probe it not in my day got fed up with all the crap and moved to Christchurch Dorset and went into building trade now retired
back into engineering love it iam my own boss QA up to me
back in my day we did not have cam or a computer everything done with calculator and log tables never came across a cnc machine that did not have g41 g42 must b be a nightmare without cam
no i have never seen a temp controller machine shop point being if you do need to hold these tols.these need to be considered if the tolerances are are needed or is a draughtsman being over the top for example job on 4 axis one hole +- .002 on pos and on dia on assembley turns out to be a hole for a screwdrive ??
g41 g42 are cutter comp on dia of the cutter program the profile of your part in cam or by hand enter the cutter dia in the machine control if part comes out oversize alter the dia on the machine not in the cam
back in the day with no cam this was very powerful tool to hold tight tolerances on profiles.
i have mach 3 on two of my mills and is not always happy with these g codes fusion 360 has an option to use g41 g42 that i do use
back to the original thread on holding tolerances on cnc machines we had a job that was about 3" 3" steel gear plate the tolerances were.0005 on pitch of holes we did this on a big Matchmaker bed mill had to warm mill up for about 3 hours run job 3 hours what was happening as the machine warmed up the colum moved stable for about 3 hours then moved again to hold these tolerances everything needs to be temp controlled room including inspection all our jig borers were in temp controlled rooms this was in the aerospace industry
|Thread: screw cutting|
rotagrip sorted me out with tool holder and tips be here in two three days will do everything i need
many thanks Geoff
|Thread: Message from the prime minister|
made me laugh to in these times we need a bit of humor
|Thread: screw cutting|
so i want to screw cut threads on cnc lathe g code no problem. carbide tip tool holders do you need a different holder for every thread ie metric coarse metric fine. one tool holder and different tips or two tool holders ? also need to cut 1/2 32 tpi thread do i need a another tool holder very confused any help please many thanks ( shank size 12mm)
|Thread: fusion 360 cam|
thanks everyone for your help been in the shop and cut the face Jasons post worked great
many thanks Geoff
just tried that works great will now go an machine it new there had to be a way
ps still working on the midget engine
yes simple job have come across this problem before for a simple op it seems over complicated must be a way round it your last suggestion is the way iam going to do but will use cambam an use pocket lot easy that fusion
yes it is just a facing cut but leaving the boss .5 mm high
i have machined the part using 3d adaptive clearing contour to finish the boss contour to machine outside profile and pocket to machine the c/bore but this leave part of the blue are not machined
see what you guys are saying and i agree but surely there must be a way of machining this face with whatever dia cutter you like or have in your box 6 mm would do the job but using 10 mm not so many passes and does not affect anything else i could easily prog by hand
I want to machine the area in blue the part is 125 mm 40 mm the boss is 25.3 dia top of boss is z zero the blue area is -.5 mm cutter 10 mm dia no matter what i try i cant get fusion to machine blue area any ideas welcome
|Thread: Novice attempts to build a Filing Machine|
looking at your router it does not lookup to the job this is what you need sent you a pm
|Thread: Hello fron the New Forest|
welcome iam in Barton on sea where in the forest are you ? i have 2 cnc lathes 2 cnc mills 3 mills two lathes if i can be of help give me shout
|Thread: Convert PDF to DXF?|
Richard plus one for inkscape i use it all the time to convert drawing to dxf then i can use the dxf file in my cam for the cnc machine
|Thread: Jumping in|
Hi Ian i have just got a bantam about three weeks ago all set up and running fitted a dro and quick change tool post it runs on 240 volt been covert about 10 years ago iam over the moon with mine had to sell a boxford and a myford to make space . a lot more power no more belt slip need to sort out the foot brake looks like it just needs to be adjusted .tailstock die holder would be a good project if you need any help message me
all the best Geoff
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.