Use locator pins between the tombstone and plate.

Just found your videos the other day. Really enjoying them and the quality is top notch.

Tombstone looks great. You certainly made an incredible effort.

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.

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.

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.

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

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?

What size is your tombstone ? And what thickness is the fixtures that attach ? Great channel 🤘🏼🤘🏼

Let me know if you are still intrested in a pair of precision ground stones. I'm going to be making a batch soon

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.

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.

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 just wanna know where you got that marker you were using to write on the part

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.

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

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!

Figure 8's when lapping/dressing, and use a good amount of WD-40 when stoning the table.

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!

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...

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.

Make video on 4 axis rotary table A axis jobs.... Make playlist of this 4 axis with all over different workpiece..... please

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

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

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...

Dowl pins bra

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