Messages

1881

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 04:51:38 PM »

I think it will work for a while, this is a mini multipurpose machine and I can easily upgrade sensors later if needed, i'll try slowing homing a little more and check that as well.

1882

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 04:38:39 PM »

Is that with servos/encoders or steppers?

I could probably tighten up a bit more by slowing the homing rate down a bit more, slotted opto's would certainly be better though.

1883

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 03:51:34 PM »

Bugger, apologies, typing too fast.

0.06

1884

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 03:24:11 PM »

Yes, the previous one was measured when the sensors were not working correctly, the new PSU has sorted that out 100%

1885

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 03:06:15 PM »

I ran 25 homing routines and the dial indicator I had on the Y axis varied from zero to -0.06mm overall, generally nearer to zero.

1886

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 02:31:33 PM »

Yes, ±.5mm sucks for homing accuracy.

Now 0.00 to -0.6mm I think that's acceptable??

1887

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 15, 2016, 02:30:44 PM »

Well, I'm officially baffled but very happy!

Changing the BOB PSU has completely fixed the issue, I have now got sensible homing routine, all limits working and the homing accuracy is now better than 0.1mm, more like 0.00 to -0.06mm variation over 25 homing calls.

1888

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 13, 2016, 11:08:19 AM »

If your not using the encoder DRO's for anything, you can emit the DoOEMButton(133).

BTW i took that line out and now it does not zero the work DRO's so i guess I'll be putting it back

1889

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 13, 2016, 10:47:24 AM »

Well, I am just about ready to give up for the day! And I hate shutting up shop on a negative position.

It works fine if i run off the variable bench PSU but not on the little SMPS, but i don't think it's needed to spend £110 on a PSU just for the BOB!

Here's a video showing the result on the SMPS...
https://youtu.be/m9_6XrzW0Fc

And here's one showing what I expected and indeed what I get on the bench PSU...
https://youtu.be/XcI2J5RcyrE

Now the big question is WHAT DO I DO??

Obviously I will be throwing this at CNC4YOU as it's all their components but they usually blame the setup or the earthing or the wiring blah, blah, blah...

Facts...

The drive PSU & drives wipe out FM radio when engaged.
The BOB PSU does not work with my sensors.
The sensors appear fine when on a different PSU.
I am a bit p1ssed off at present as this little setup should have been easy

Just about ready to pour a big one.

1890

General Mach Discussion / Re: Limits - Am i being too smart ;)

« on: March 13, 2016, 09:33:21 AM »

Seems i have a BOB PSU issue - if i run the BOB and sensors from my bench PSU it all works perfectly, no flickering LEDS or false triggers and i can enable the limits properly.

If i run from the 15v SMPS i get flickering LEDS and duff sensing, but it only does it when the drives are enabled! Had not noticed that before, seems the drives/motors/psu are interfering with the BOB some how.

Getting baffled now