Spindle indexing signal direction

Oh, OK. Good call.
I'm going to have to make a trip to the workshop for the sample code.

This is a syntax example:
G76 P- Z- I- J- R- K- Q- H- E- L-

By the way Clive, some months back I used your ATC code on my Boxford and It worked faultlessly without issue. I thought I was in for a rough ride getting the ATC working until I used your code. So thanks very much for that.

rider-83 wrote:

Oh, OK. Good call.
I'm going to have to make a trip to the workshop for the sample code.

This is a syntax example:
G76 P- Z- I- J- R- K- Q- H- E- L-

This is what I use for a 10mm thread on my Myford (not sure if you are using a Boxford ie back tool M4)

G0 G40 G18 G80 G21 G49 G95
G90 G7
( it needs an F number otherwise it doe not work)
F1.5 S470

M3
G4 P1
M7
(Change the fist X to the Dia P = the Pitch K = Thread depth)
G0 X10 Z10
G76 P1.5 Z-12 I-0.1 J0.1 R1 K1.5 Q29.5 L0 H1

g0 X30
g0 Z50
M9
M5
M2
%

The use of that F1.5 is interesting. What is happening there ?

Yes, it is a Boxford using M4.

When the spindle is turning using M4, should the 'B' Phase be leading 'A' ?

Also,
I feel a bit of a challange.  The spindle servo drive has a differential encoder with A+ A- / B+ B- / Z+ Z-
Is it possible to connect LinuxCNC to this type encoder? I assume there will be the need of a special counter circuit?
Should I start a thread based on this project?

rider-83 wrote:

When the spindle is turning using M4, should the 'B' Phase be leading 'A' ?

Also,
I feel a bit of a challange.  The spindle servo drive has a differential encoder with A+ A- / B+ B- / Z+ Z-
Is it possible to connect LinuxCNC to this type encoder? I assume there will be the need of a special counter circuit?
Should I start a thread based on this project?

I think that using the servo drive encoder might be too fast for the PPort.

The problem with the rpm showing up and down might need a filter. Not sure though

It might help to move that to a new post and hope PCW will take a look.

Don't forget to add the config files

Yes, I might start a new thread for this one. Its defiantly got me interested, and I think other people could make good use of it too.

I have a parameter on the drive module to vary the PPR all the way down to 16.
So I could set it at 100 as per usual Boxford.

I've done some digging around and found an appropriate IC to rectify the +/- Phase signals to just A,B etc.
Also there are some ready built suitable optocouplers, but I did notice complete opto counter units designed to handle all the servo encoder signals ready for the LPT port. Just a little pricey for a hobby project though.

I've just found this:

www.thanksbuyer.com/differential-signal-...end-pcl-signal-29365

I've seen other thread suggesting that method, and was wondering if that would be succsessful. What are the advantages/disadvantaegs of using only + signals rather that +/- ?


From what I can understand from the manual, I can supply a voltage upto 30vdc to the encoder. So I think I can use my existing 5v supply that I'm using already.