Fanuc 15M High Speed Skip

[stang623]

Need help understanding this option. If I look at parameter 7200 bit 4 it is a 1 which means high speed skip is enabled on my machine. I have a tool height sensor that came with the machine, it is used with a G31.2 commanded.

Now if I wanted to put a probe in the spindle to measure work offset, how would I go about wiring this in? I believe the high speed skip is an extra board of some sort? Can someone here help me identify this board and where I would wire in an additional high speed skips?

Thanks,
AJ

[Al_The_Man]

For H.S. skip you need an Option 2 board, they have all the H.S. skips in the same input Honda connector.
The normal skip is present already as a dedicated input.
Al.

[gbowne1]

I always believed that the 15M high speed skip is a option parameter, along with setting the Parameter 7200 bits.

The B model 15M it's a special board. I just the other day got in a 15 Model B main CPU board.

I've never used a G31 but my 15M machine (a 3-4 axis VMC) has a Renishaw probe I got from eBay.

I'd like to try using high speed skip though.

[stang623]

gbowne,
Can you tell me more about your installation? How hard was it? What connector did you wire your probe into? What command do you use to use it?

Thanks,
aj

[stang623]

At work, looked at machine. I do not see an option 2 board but parameter 7200 is definetly high for the high speed skip. Could it be on option board 1?

If not then how do i identify where the inputs are for the regular skip? What inputs would be associated with this? I would like to see if I can see the input change on the machine?

AJ

[Al_The_Man]

My BMI manual shows I0.3 as SKIP1 and I1.5, 1.6, 1.7 as SKIP2-4 respectively.
The location of the input will depend on what series of 15 you have as to the I/O layout.
Al.

[stang623]

Al, looks like I have a 15MB control. Does this answer your question? Any idea on what connector that would be with?

Can I look at the PMC diagnostic and watch for the signal to close? What bit would that be? Aren't X Inputs and Y Outputs?

Thanks,
AJ

[Al_The_Man]

Yes, you should be able to see it in the diagnostics, I should have shown X0.3 etc.
This input is passed over to the CNC automatically so there is no ladder conditioning to be done via the BMI.
The axis position results are seen in the 5000's variables for macro use.
The connector will depend on what I/O system you have, but it should be possible to trace the X0 and X1 inputs if you have the I/O listing?
Al.

[stang623]

Alright, I've been doing some more research to understand this problem a little better. I also looked through my manual to help myself out.

Looks like there are two high speed skip signals used as options. One of the options is for a work probe and one of the options is for a tool probe. I've been using the tool probe so i know that I have that option, however when looking through the ladder list in my manual I could not find anything relating to this tool proble. I figured I could trace things out in the ladder. Looks like the skips are both on connector JA5A. Pins 11 and 12 for the tool probe and pins 1 and 2 for the work probe. The weird thing is that F46.1 is used for the tool probe and that is not labeled in my manual. It is also a normally closed contact, looks like it is a 1 until it is triggered and then it goes to 0. The funny thing is this is not labeled in the manual, someone chicken scratched it on the page by chance from the previous owner.

So my question is how do I determine if I am ready for a work probe. Seems the easiest thing to do would be to wire in a switch and trigger it manually? However how would I determine which F bit is used to see if I'm triggering it? Can I search the ladder on the machine? Or is the switch a bad idea alltogether?

Thanks,
AJ

[Al_The_Man]

I don't see a JA5A, all the 15 info I have show either a local I/O units or remote, the HS skip shows as requiring the 01P26 option board, and this has a CA8 Honda connector for all the HS skip inputs.
You can try a switch input and test it with a skip command.
Al.

[gbowne1]

I'm only used to the high speed skip on the 16/18/21. I believe it's set up the same way. But yes you'll need the 01P26 board. I too checked this with my 15 docs. If you have this board, look for the Honda plug with CA8 and wire up a cable from this connector with the appropriate wire and hardware listed in your manual. Which -B50x control unit are you running? Which CPU board? I just never understood how the HSSK i/o is actually implemented.

Using two different probes? I use mine set up for entering into the offset measure for G54 and G55. I also was using the Renishaw interface box at one point.

[Al_The_Man]

Originally Posted by gbowne1 I just never understood how the HSSK i/o is actually implemented. .

AFAIK, the HS skip is a dedicated input that bypasses the PMC altogether and creates a CNC processor interrupt to record the positions ASAP.
Al.