Andy's knee mill project

and it is alive! thanks!

soooo glad it was an easy fix! been a bit of investment...

Hi Again,

Homing sequence up and Running

So I have a new problem:
I have the Steppers all wired and working fine.
I decided to wire up an external control circuit to control coolant and spindle motors. I also added an EStop that will kill this control circuit (and an over ride for coolant)

the EStop is my problem
It has 2 normally closed contacts
one kills the coolant and Spindle independent of EMC.
the steppers however are powered Independently.
So plan was to use the second contact to tell EMC that the EStop has been Pushed.

I cant seem to get this to Work
this is my Break out Board
www.slidesandballscrews.com/pdf/uniportV2%20_2_.pdf
(tried to attach it to so will see if that works)

using EMC2.4.4

My questions:
For EStop do i need to use Estop out and Estop in? or can i wire like a limit switch with just EStop out and then return to ground?

From the pin out on the BOB I am using 14 for EStop out and 13 for EStop in. does that look right?

I have tried this:
Basically I deleted the "net estop-out charge-pump.enable iocontrol.0.user-enable-out" line and added a "net estop-ext => charge-pump.enable" line.
from here:
www.linuxcnc.org/component/option,com_ku...5/lang,english/#4973

and that gives me the Charge pump Signal back and stops the normal "EStop" button in the EMC interface from working

However I cant get the Estop to work. I have tried bridging terminals on the BOB with no luck

I have also tried using pin 8 for EStop out with no luck

So if that didn't make sense i am trying to get an external EStop to tell EMC to Stop.

Thanks in advance.

Andy.

no change of state when e stop is activated (Charge Pump stays on). from the diagram attached do you think e stop out for 14 and 13 for e stop in.

so not sure what to do, thinking i might have to just run another wire and get another contactor to cut power to stepper drivers with e stop on the control circuit...

Well it has been a long time and have worked on it most weekends but i am finally up and running!!!

few issues

1-i have some drive power issues on Z axis which is intermittent and i am struggling to lock down, should have converted to ball screw on Z also but it isnt stopping me, still runs at 500mm/m

2-Setting tool offsets is a bit fiddly, i have had issues a couple of times. what is best practice? i dont seem to be able to set a tool with zero offset??? when i edit the tool table it seems to give errors, do i need to do all this before activating a G54?

so at the moment i am setting G54 and the length offsets for tools, i have all tools set up in SolidCam and so have 55 tools in EMC (i just set the ones i need but this way each tool always has a home...)

3-i have a G code problem regardless of lead out or not with a hole cut with helical dept on the last clean up (the one without a change in Z height) there is a unexplained variation from path and then the final clean up on Z level before feeding out on the strange position, this leaves me with two overlapping circles rather than one clean circle. hasn't broken anything as i have been cutting HDPE but ally will cause trouble... an example is below:

G0 Z50.
X17.075
Z2.
G1 Z0.
Y16. Z-0.091
G2 X18.075 Y15. Z-0.235 R1.
X18.075 Y15. Z-2. I-3.075 J0.
X18.075 Y15. Z-4. I-3.075 J0.
X18.075 Y15. Z-6. I-3.075 J0.
X18.075 Y15. Z-8. I-3.075 J0.
X18.075 Y15. Z-10. I-3.075 J0.
X18.075 Y15. Z-12. I-3.075 J0.
X18.075 Y15. Z-14. I-3.075 J0.
X18.075 Y15. Z-16. I-3.075 J0.
X18.075 Y15. Z-18. I-3.075 J0.
X18.075 Y15. Z-20. I-3.075 J0.
X18.075 Y15. Z-21. I-3.075 J0.
PROBLEM STARTS HERE???????????????????????????
X18.075 Y15. I-3.075 J0.
G0 Z50.
M30
%

i dont see anything wrong..


Cheers,

Andy

P.S. will load some pics when i get a chance...

Thanks for reply,
Thanks for the tips with too offsets, i have been using T# M6 with G54 so will try with G43 i plan on using G54, G55 and G56 on this job soon so will keep G55

I like the dowel idea .

Here is another sample of code, once again problem starts near bottom, this code should have a lead out away from the edge, in fact it is leading out in the material,ie on the wrong side of the profile. it looks fine in simulator but not when run...

yes i have given the bottom of my code, total code is some 500 lines... i am using SolidCam with Fanuc controller (i used this at uni so am reasonably confident with it) i realise it isnt necessarily neat code but it works...

Thanks

Z2.
G1 Z0.
Y35.5 Z-0.096
G2 X189.125 Y35. Z-0.247 R0.5
X189.125 Y35. Z-1. I-0.625 J0.
X189.125 Y35. Z-2. I-0.625 J0.
X189.125 Y35. Z-3. I-0.625 J0.
X189.125 Y35. Z-4. I-0.625 J0.
X189.125 Y35. Z-5. I-0.625 J0.
X189.125 Y35. Z-6. I-0.625 J0.
X189.125 Y35. Z-7. I-0.625 J0.
X189.125 Y35. Z-8. I-0.625 J0.
X189.125 Y35. Z-9. I-0.625 J0.
X189.125 Y35. Z-10. I-0.625 J0.
X189.125 Y35. Z-11. I-0.625 J0.
X189.125 Y35. Z-12. I-0.625 J0.
X189.125 Y35. Z-13. I-0.625 J0.
X189.125 Y35. Z-14. I-0.625 J0.
X189.125 Y35. Z-15. I-0.625 J0.
X189.125 Y35. Z-16. I-0.625 J0.
X189.125 Y35. Z-17. I-0.625 J0.
X189.125 Y35. Z-18. I-0.625 J0.
X189.125 Y35. Z-19. I-0.625 J0.
X189.125 Y35. Z-20. I-0.625 J0.
X189.125 Y35. Z-21. I-0.625 J0.
X189.125 Y35. Z-22. I-0.625 J0.
X189.125 Y35. Z-23. I-0.625 J0.
X189.125 Y35. Z-24. I-0.625 J0.
X189.125 Y35. Z-25. I-0.625 J0.
PROBLEM STARTS HERE
X189.125 Y35. I-0.625 J0.
X188.625 Y34.5 R0.5
G1 Y35.
G0 Z50.
M30
%

mm bummer, i dont want mechanical or electrical issues...

thanks again with the tool setting

I just had an idea... Could it be because i have different accelerations on X, Y and Z? on that last circle as Z comes to final depth is it possible that as X and Y are also accelerating as they plot the circle it is stuffing up?

Just an idea... might try making all accelerations the same as i dont want this happening in aluminium or steel!!!