4th axis tombstone setup for the Tormach MicroARC
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- เผยแพร่เมื่อ 18 พ.ย. 2020
- Installing and setting up a Mini Tombstone for the 4th axis on the Tormach MicroARC.
A lot gets covered in this video. Checking deflection and runout, Machining a bore, moving a vice, and more.
Just found your videos the other day. Really enjoying them and the quality is top notch.
Thank you very much! I hope there's something in there to learn from even though I'm not always doing things right.
Use locator pins between the tombstone and plate.
Tombstone looks great. You certainly made an incredible effort.
Thanks, It's not bad for a first crack at it. I definitely have more ideas now on how to do a better version sometime in the future.
Promising channel... thank you for your efforts
Keep the vids coming man You'll do good. Just be carfull with the air blowing clean the 4th axis so You dont force chips into the small mating surfaces and seals.
Not sure if I'm correct here but I would have just bored out the hole for the bearing and faced off all 4 sides of the tombstone on the machine again and I believe that would given you 4 perfectly level faces. correct?
I was wondering the whole time, surely those bolts are not the repeatable indexing for the assembly.
For something soft like aluminum I think you want for example a central 1" ground pin for greater surface area that tightening bolts won't influence.
Common practice in aluminum engines is hollow pins for location with bolts passing through the middle for tightening force only.
The biggest stepped spigot face you can make in the parts with your borer (alum to alum) will also give the results you want.
Perhaps if you relieve the bolt holes a little enough to get your centre hole spot on with tapping as you where doing, then the assembly can come off and have random tight fitting dowel holes drilled through the assembly to locked it in place with pins requiring tapping in with a hammer.
Indeed. Next time I do one of these the design will incorporate some kind of built in hub centric ring, or just make it all out of one piece.
I know this wouldn't necessarily help your run out. But, you could face the tombstone flat on each side, while it's mounted, that way each face is at least parallel with the machine.
Yes, I will do that exactly after the tailstock is installed to make it square and to the final dimension.
Great videos! I just got my Tormach MicroARC so thanks for paving the way. If you don't mind me asking, what camera are you using? Great video quality.
Thanks! The camera is a Canon T7i with EF-S 18-55mm lens most of the time.
@@vcedge9466 Thank you.
Maybe consider making a live center that has the same height as your 4th axis then you can drive it into the bore, and your tombstone setup will gain rigidity so you will get less leverage when machining on opposing side of 4th axis, nice work man
Thanks! I actually did make a tailstock that is much like a live center. Check it out th-cam.com/video/RsaAqWnzGgQ/w-d-xo.html
Hi Jason, I’ve only just found your channel and loving seeing what your doing. I’m just about to take delivery of my brand new Syil X7-20 mill with a 4th axis, so this tomb stone is exactly what I’m going to be doing. Love your tails stock end support for it, nice and slim.
I’ve started watching your knife vids as well now, and I’m liking how clear and informative you are in describing what your doing. Please keep doing these great vids mate.
I’m definitely interested in the filter felt you used, as I’m going to use Synergy 735 and will be doing some carbon work with full flood coolant. What do you recommend having used it now?
Thanks, Rob.
Thanks very much! Congrats on the new machine, what are you going to be making? The filter felt I get from Mcmaster-carr, just the standard kind. In the chip tray the 25 micron was too fine for carbon and would start filling up quickly, 50 has been better but still needs to be swapped somewhat regularly. The 2nd stage 10 micron filter bag is going strong, Pressure still hasn't dropped at all, could probably go even lower without issue. I believe the 735 coolant can be filtered down to 1 micron if desired but it seems pretty clean even at 10.
@@vcedge9466 hi mate, I’ve been heavily involved with the RC Helicopter hobby for over 30yrs, so I’m planning on a range of upgrade/performance parts around our hobby.
I just wanna know where you got that marker you were using to write on the part
Ah, yes. Those are Pica pens, you can find them on amazon. Saw them on an Adam Savage video a while back. They are really nice!
How did you set the wcs? With probe? Also did you notice and change when rotating 90°, or when z changes to y and visa versa?
Let me know if you are still intrested in a pair of precision ground stones. I'm going to be making a batch soon
What size is your tombstone ? And what thickness is the fixtures that attach ? Great channel 🤘🏼🤘🏼
E-stops generally turn off everything and dump any potential energy out of the system. Also, you want the tool changer to fail safe. If there's a problem with the air, you don't want the tool changer to pop and interfere with the work, mid cycle. I don't know if it can be re-designed to prevent the problem you described.
Figure 8's when lapping/dressing, and use a good amount of WD-40 when stoning the table.
Good point. Thanks for the advice 👍
By any chance have you noticed a big runout with the original chuck? I am getting almost .005 total runout when referencing a .500 gage pin. It looks like not matter what I do I cant seem to get the runout shorter than +/- .0025 the thing is driving me nuts!
I'll assume you've already set the runout on the faceplate itself. I haven't measured runout on my chuck yet, however, I did notice a rather large difference in the size of the flange that locates it to the face plate. It would allow some adjustment if you loosen the screws and move it around. If you're already doing that and the faceplate is at zero runout then the chuck itself seems suspect.
@@vcedge9466 yeah the faceplate was adjusted but couldn't beat +/-.001runout. The tram on my 1100mx has been dialed in with shims almost perfectly (about .001 from X axis end to end). I appreciate the response and was hoping I wasn't going crazy setting this thing up at midnight. I did however noticed the chuck itself has some play as well which I adjusted down to .005 but everything doesn't seem concentric.
Ok, note to self don't use the alignment key that is provided! Just got it dialed in without the alignment key and don't align your 4th axis or anything else at midnight lol
@@hmmmmmmm11199 Alright, good advice. Thanks for the update! My key seems to be ok but I can imagine some might not be.
Don't torque values depend not just on the fastener, but the mating thread and and associated structure? There's no way for McMaster-Carr to anticipate that. Sure, they could give you a permanent deformation and failure value, but that still wouldn't provide for operational force levels...
If you were to make another one you could dowel the tombstone to the fixture you made that way itll be perfectly positioned every time you separate the two pieces. Awesome job otherwise!
Add a g30 command to move to a safe spot for tool changes some times have to add a second g30 manually after tool change
28:15 it still not mean tombstone is center. it just mean this hole this long from 4axis. you have dialed your 4 axis using inches LOL. now you need cut tombstone again from flats anyway lol. still it change after you remove it and put back again
Hi. Allways wonderd about this. Why use a boring bar. Is the cnc machine not capable of machining a perfect round hole or is it just the tormach.
The machine is capable of interpolating a "round" hole but no matter what machine you have it won't be as good as with a single point boring bar. The difference is very small it could be just a couple ten thousandths roudness but also the finish of the hole would be less smooth.
@@vcedge9466 with all due respect please know that I am a big fan of your channel. I am your junior when it comes to machining but the question still stands. Your explanation makes sense but considering your measuring protocol (telescopic Guage and vernier) and added vibration that comes with a unbalanced boring head the 2 tenths flys out of the window anyway. Just a thought.
@@noedger No problem, I didn't actually measure the roudness, if I was trying to do that I would definitely use a micrometer (didn't have one handy in that size range). There wasn't any vibration at the 1k rpm. There is also the finish of the hole to consider. End mills leave feed fwd lines and I want it smooth for better contact with the bearing. Next time I do a bored hole I'll demonstrate.
@@vcedge9466 No pun intended. Was just interesting. Seen it alot from other channels. Just thought it was a good subject. Thanks for your input. Keep the vids coming.
Even on the most accurate CNC machines, a good boring head will always make a straighter hole with better roundness. There are a lot of variables involved when interpolating a hole.
Make video on 4 axis rotary table A axis jobs.... Make playlist of this 4 axis with all over different workpiece..... please
Dowl pins bra
Why don't you just program the table to move taller parts out of the way of the spindle before doing a tool change, you may have to manually add it to the program but it would just be adding one extra rapid movement line such as a G00 X-7.0 before the tool change. Instead of using shoulder bolts for locating try using dowel pins, press fit on one part and a tight slip fit on the other.
Coming from big Machines like doosan you don’t stop it in the middle of the tool change
Do you know what damage it causes on those if you do? I'm sure someone must have done it at some point.
On the big boys they stop everything in their tracks. You have to go through a recovery procedure.
Fortunately Pathpilot is really easy to work with. The reason the tool tray retracts is because when e-stopped tormach kills power to the pneumatic cylinder valve which returns it to its ready state.
I need to try e-stopping my 770 with the stepper driven linear drive.
How to setup 4th axis??... where to take offsets ...? How to take x y z A of 4th axis...?? Where to put offset??? What is difference between 3 axis and 4th axis A rotary axis???... Make detail videos and make playlist ...
26.16 is it moree off now xD. maybe should take tombstone off couple times and read values. its allways diff. not even amateur would make lip for holding piace NOT use just bolts LOL. and you can measure that round in center againts flat surface before tighten skrews. you have dial. cnc and cnc flat table. think lol
RIP surface plate...
Lol!! One plate is the flat sanding plate , others are don’t ever get dust or chips on. 👍👍
learn the art of scraping. its by and far the best way to flat a surface. very laboring and time consuming but its where perfection is had.
35.33 use metric 3 digit give more acurate reading +0.02 error what these calibers give. stop chasing thous. when you can chase hundreds means 0.010mm. 1 thou = 0.0254mm. get it yet?
thats 35mm bearing caliber says 1.3780in = 35,0012mm, 35mm = 1,37795in caliber round it 1.3780 and it says 35.0012mm. start see diff? even caliber can have reading/display tolances. mm is way to go.
i have listed all majos inche dimension 3/8, 5/8 etc to 3 digit number and all are more acurate even change +-0.001mm than rounded inch by 5 digit on inch LOL could write book bout it. machinist should use metric
20:50 Yeah! 3 digit metric is better resolution. not even pro's know that. command is G21 dats easy.
0.158mm = 0.0621
0.157mm = 0.00618inch
0.156mm = 0.00614inch
start to see diff? inches is stone age