Which machine for headstones - please help.

[JAZZCNC]

In 2017 I fitted new bearings to spindle (downtime 1 week ordering the bearings 2 days fitting) the machine has been run day and night over weeks at a time, from 2012 to date.

Hi Phill, Just out of curiosity how many bearings where in the nose of the spindle because that looks like a longer than standard nose compared to a routing spindle with ER Taper?

Also did you buy the machine as a machine for cutting stone etc. or a general-purpose router.? . . What I'm trying to establish is if the Chinese spec'd the spindle for stone or not. The 3Kw spindle we used didn't last much more than 3 months using Flute routers solely cutting Granite, these.!
https://granitetools.co.uk/product/g...10mm-diameter/

Have you an idea how much granite work you have done with this spindle, I'm not so much asking about engraving/carving but Fluting and cutting/profiling, etc, I'm curious because I may pursue this type of spindle if it's not a standard routing spindle and you have done plenty of this type of work with it for a sink hole/drainer machine.!

[Sebastian]

Hello Phill ! I am from Romania and I work with granite tombstones. I am looking to buy cnc carving machine for tombstones from China like the one you posted... is there a chance you could help me too choose the right one or things I have to look for when buying one ? Cnc is a whole new thing for me and it would be really really helpfull any tip. Thank you very much!

[phill05]

Hi Seb,
PM me your email and I can send you images and details.

Phill

[Boyan Silyavski]

Phill, thanks for the info. That confirms my thoughts on the subject. So maybe after all i will use my cutters a couple of times. What feeds and speeds you use with the diamond V cutters?

[phill05]

PCD on Granite ramp in slow as cutter is very brittle.


On stone you can increase the feeds depending on detail needed.

[phill05]

Hi Jazz,

Going back a few years you were the first I asked when we had problems with DSP control.



Shopping list:
Wet end. 2 off. angular ceramic bearings: outer race..... H7007C.T.P5.UL ESKY *-4* 12E162 41 C.Y.
inner race... *-3* bearing is 62mm O/D, 34.98mm I/D, 14mm thick.

Dry end. 2 off. angular ceramic bearings: outer race..... H7205C.T.P5.UL ESKY *-3* GERMANY 42 C.Y.
cannot find any marks on inner race. bearing is 52 O/D, 24.98mm I/D, 15mm thick all taken with a vernier.

No idea total of whats gone through all I can say it has done a lot of work over the years extract below from china paperwork:.

You might be able to find out more on the spindle here:
JINAN MUNAN IMPORT AND EXPORT CO., LTD
Address: 3-2-607, NO.101, HUAYUAN ROAD, JINAN, CHINA


1218 Stone engraving machine ,steel
structure,1200x1800x250mm,stepper motors and
drivers,two motors for Y axis,X Y geer-wheel,Z axis
high precision ball screw,linear square orbit,DSP
control system,water tank,type3 software,5.5kw
imported bearing water cooling spindle,two water
pump(one for spindle cooling,one for tool
cooling),some tools for stone engraving



Phill

[JAZZCNC]

Hi Jazz,

Going back a few years you were the first I asked when we had problems with DSP control.

Yes I vaguely remember but I email, PM, chat and speak to a lot people so no idea what I said... Probably along the lines of Dump it...Lol


Shopping list:

Wet end. 2 off. angular ceramic bearings:

Well, straight away that's a big difference using ceramic bearings and what I would expect to be in a spindle designed for hard materials. Thou I did expect 4 bearings if I'm honest but suppose for that money it would be expecting a little too much.

[Boyan Silyavski]

I believe a plastic shielding collar ring and plate, similar like plasma torches have for sparks will stop at least all the mess that is going to flow up. And 2 plastic shield at the sides at the height of the gantry to pass freely, will save a lot of cleaning the side rails and bellows.

Anyway, that machine looks very nice.


No one has experience with the impact engravers to share?? Seem simple and cheap to make. Probably the software will have most impact on the result.

the machine bellow seem quite basic. probably there is a faster way to do it with a real servo machine

Anyone any idea about a pneumatic engraver to attach to my machine and do some tests?

[JAZZCNC]

Anyone any idea about a pneumatic engraver to attach to my machine and do some tests?

Something like this.? https://www.cncstepusa.com/cnc-dot-p...engraving-tool

[Boyan Silyavski]

Something like this.? https://www.cncstepusa.com/cnc-dot-p...engraving-tool

I have same same, they just have added collar. Now its not working properly and can not find the reason why. Sometimes works, sometimes not. Open it, dissassemble it. Its clean all seals on their places. Close it. One time works, one time not.