Can't get lathe to Feed

Try a lower spindle speed. It is possible that the encoder counter can't keep up, or that the steppers are maxjng out on speed.

andypugh wrote:

Try a lower spindle speed. It is possible that the encoder counter can't keep up, or that the steppers are maxjng out on speed.vvSir even at 300 RPM same result. I am attaching my config files. 

File Attachment:

File Name: rplathe.ini
File Size:3.04 KB

File Attachment:

File Name: postgui_call_list.hal
File Size:2.09 KB

File Attachment:

File Name: rplathe.hal
File Size:4.52 KB

File Attachment:

File Name: spindle_20...5-08.hal
File Size:1.74 KB

Update:
1. Thread pitch not matching with 2 mm pitch. I am running threading macro G76.
2. Have altered RPM
@ 200 RPM pitch comes out 3.2 mm
@ 400 RPM pitch becomes fine 1.6 mm.
3. Z axis can accelerate to 6500 mm/min.

What else I have to look for proper thread.

I have 1:1 gearing from my motor to my spindle.

I had two issues with my system.

1st was unreliable encoder and wiring that was loosing counts due to encoder arrangement and wiring etc.
To resolve this I used the Servos built in Quadrature encoder.

2nd was the inability of the LPT port to count the pulses reliably.
This was resolved partially by turning down the resolution of the built-in encoder to 16 pulses
(16x4=64 in HAL), but the LPT port still struggles to cope above 500 rpm

I should have opted for a Mesa card.

Everything looks OK as far as encoder count rate, maximum step rate and axis velocity limits is concerned.

I am beginning to wonder if there is something like a slow optocoupler gettting in the way.

If you monitor the spindle velocity from the encoder with the halmeter, does it keep up as you increase the spindle speed?

(It will bounce around quite a lot, just see if it continues to be about right at each spindle speed, or whether it maxes out at around 200 rpm.)

Not actually the problem, but why do you have the encoder set to counter-mode?

Sir, Currently I have a Stainless Steel disk with 100 slots. Maybe there are some reflection issues. I have ordered a laser cut disk MS with 50 slots. Will update the results soon....