Its affectionately known as the King of machine tools for a reason. I have had one fro thirty years now and would not want to be without. Not sure if that's because I am a sad old bugger or prudent!
Hi Rengan, Good question, you measure the distance from the table to the bottom reference face of the spindle. Best done with gauge blocks but can be done by using a piece of metal of known length then you jog the head down until it touches the block. Then enter the length into the Z height in the software. Cheers
If I had done that, I wouldve used a much stiff spring just to make sure that the touch bar was guaranteed to return to the exact same spot over and over
Lets hope! The issue I see with this type of switch is it has no hysteresis and no 'snap' action to make or break. I feel at the point of connection there will be a whole load of noise that would be best filtered out or better still use an Arduino to capture the first make /break. I have a diy touch probe coming up next year that uses an Arduino in this mode and should be more accurate. Thanks for the comment.
@@CazualHaze it "bounces" a few times? And what breaks the electric contact in this version? May be use a led optical switch? Using a optical switch might eliminate the need of Arduino logic
Yes I agree however when switches particularly this sort of diy job open and close they bounce and create lots of noise which in turn causes lots of trigger signals. An Arduino could stop this by using an interrupt this triggers once on the first switch transition. I have been experimenting with a touch probe and the software stops this issue and gives a solid result in the fastest time. Time in the cnc world equates to movement so to stop a axis moving you need to respond asap. An optical switch would be a good choice of sensor but requires some sort of blade to make / break which in turn makes the design more complex. I have thought of using a tactile switch which has better make / break characteristics but as yet have not experimented with it. Best David
@@max_eley If you only knew just how ignorant you sound when saying that... What I don't understand, is why you people choose to only bastardize the pronunciation of the letter Z. Why not the D, P, C, T, B, G, E... or hell just mispronounce the entire alphabet while yo're at it?
![[ ออกกอง ] วัยหนุ่ม 2544 โลกหลังลูกกรง..ทัวร์กองถ่ายหนังใน "คุกของจริง" | JUSTดูIT.](http://i.ytimg.com/vi/vB--aOkZCpw/mqdefault.jpg)
This needs more views, chasing micrometres at its best. Subscribed
Thanks more to come!
Interesting process - learnt a lot, really want a lathe now!
Its affectionately known as the King of machine tools for a reason. I have had one fro thirty years now and would not want to be without. Not sure if that's because I am a sad old bugger or prudent!
nice Work. Perfect assembled.
Thank you! Cheers!
Sir, how does the machine know the top of the part wrt the table height?
Hi Rengan,
Good question, you measure the distance from the table to the bottom reference face of the spindle. Best done with gauge blocks but can be done by using a piece of metal of known length then you jog the head down until it touches the block. Then enter the length into the Z height in the software.
Cheers
Thanks a lot
If I had done that, I wouldve used a much stiff spring just to make sure that the touch bar was guaranteed to return to the exact same spot over and over
I agree with you I ended up using a spring I had. The pin is also soft so if I made another I would harden it.
Cheers
What kind of screenset do you have installed on the probe?
I think its either the default mach 3 screenset or one designed by Hoss or Physics Anonymous both on you tube
XR! 💚
Cheers I think!
Why did you blacken the base?
Mainly to stop a bit of rust also I think it looks a bit nicer.
Cheers
The switch should be very precise to ensure repeatability.
Lets hope! The issue I see with this type of switch is it has no hysteresis and no 'snap' action to make or break. I feel at the point of connection there will be a whole load of noise that would be best filtered out or better still use an Arduino to capture the first make /break.
I have a diy touch probe coming up next year that uses an Arduino in this mode and should be more accurate.
Thanks for the comment.
@@CazualHaze it "bounces" a few times? And what breaks the electric contact in this version? May be use a led optical switch? Using a optical switch might eliminate the need of Arduino logic
Yes I agree however when switches particularly this sort of diy job open and close they bounce and create lots of noise which in turn causes lots of trigger signals. An Arduino could stop this by using an interrupt this triggers once on the first switch transition. I have been experimenting with a touch probe and the software stops this issue and gives a solid result in the fastest time. Time in the cnc world equates to movement so to stop a axis moving you need to respond asap.
An optical switch would be a good choice of sensor but requires some sort of blade to make / break which in turn makes the design more complex. I have thought of using a tactile switch which has better make / break characteristics but as yet have not experimented with it.
Best David
"zed"... lol.
Yep depends on what side of the Herring pond you live on!
@@CazualHaze I suppose... Sounds ridiculous to *my* ears, however.
"ZEE"...lol.
@@max_eley If you only knew just how ignorant you sound when saying that...
What I don't understand, is why you people choose to only bastardize the pronunciation of the letter Z.
Why not the D, P, C, T, B, G, E... or hell just mispronounce the entire alphabet while yo're at it?
@@michaelangelo8001 Whos gonna tell this guy? XDDD