Centroid Community CNC Support Forum

CNCSNW,

Well I set P69 to .5 as suggested and it ran 10 out of 10 tapped holes successfully! It does make me crazy that this long road began with a "bad" or maybe better to say wrong encoder. I hope to put together a post that helps cover this topic without so much back and forth. The key that got ...

No but it was a hand tap not a machine tap. In the previous holes it did as it should and tapped through the stock. Tapping a blind hole will be quite the challenge getting it to not bottom out and still tap to near bottom. I will fight that another day.

I will add in my air system for this tap ...

Well yes and no... tapping .25 inch 60 -61 with a 6-32 tap had the tap break. To be honest I believe the hole had drill remnants in the tapping area. Turn 9n some air and try again...

Stay tuned..
PFM Dave

Link should be free now

So,

I see this has turned into quite the post. I did fine tune the parameters a bit and it seems to be running quite well. In the future I will try to catch up with others tapping ant much higher RPMs and related feed rates.

Something I see on the new PDF that caught my eye was the Absolute ...

Suntravel,

The video is very smooth. May I ask how you went about tuning the Rigid Tapping Configuration? Your setup is quite different than the "base" settings. CNCSNW provided some insight to how all the settings interact but your settings are well for lack of a better term all set very fast. I ...

CNCSNW,

I can go make some changes and test again, I still do not understand why if a hard parameter is wrong why or how it successfully tapped 1 in 10 holes. I seem to think this is odd. With my setup motor and pulley size 600 RPM is about as low as the machine can run. I can change the "minimum ...

Another update:

Replaced the original encoder with a new 1000 line encoder from automation direct. I wired it up to a fresh DB9, yes included the shield to the DB9 shell. The "*" in the PID screen now only blinks 1 time per revolution. The absolute position displays as a negative count, the spindle ...

Update,

I tried swapping the Z lines at the DB9, at this point the * is off and blinks when the spindle is turned by hand. The RPM displayed a negative value, so I moved to a -8000 in the parameters and got the RPM to display positive. Ran a rigid tap test getting the same 438 error. So I will go ...

All,

Not so sure the encoder is "bad". If you look at the spec sheet supplied above the Z output is High and goes low one time per revolution (page 3 last encoder). The other encoders on this same sheet all start low and go high. If I turn the spindle by hand I do see the asterisk "blink".

Is ...