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71 million views for 24 hours of black screen!!!

He has several, at 2 and 14 million for 10 hour black ones.
HOW??????

5i25 has port 2 and port 3.

5i25_7i77_7i74.bit

in:

www.mesanet.com/software/parallel/5i25.zip

I would just edit the .ini file and half the STEP_SCALE values.
There may be a bug in pncconf that sets this incorrectly  for it's
test.

109jb wrote:

I also want to again give thanks for this wonderful tool and to give a peek at what I am working on. I have a 3 axis benchtop mill (RF-45 size) that I converted to CNC a few years ago. .....
I finally decided to just do it better and got a RPi 4b, installed LinuxCNC and have been working on an interface that for most of the way I use the mill can be done without ever touching a keyboard. I'll still have a small wireless keyboard with trackpad available if needed though. This is the interface I'm working on and I think it will suit me. I have the UI sized to perfectly fit the display that I bought to use as much space as possible. Thanks again for the very useful tool.

John B

 

Thanks for sharing that screenshot.  Sounds like your situation is much like mine:  home-grown, relatively simple mill, with a couple of brain transplants behind it (I've never run grbl, but first code it ran was on MS-DOS.  Really.)  Your UI really looks like it would suit my machine just about perfectly.  I'll be copying it...   unless you feel like sharing, of course!   Thanks for the inspiration.

paul

tommylight wrote:

I am way ahead of you, this is also my channel
www.youtube.com/shorts/TkP5_BbfQ2g
 

Now to write a program that posts a new version of that 10 or more times a day. Or make it 10 hours long and
still post it multiple times a day until YouTube starts to feel the pinch in there server hard drives. I wonder how many
Terabytes it would take before they would notice?

Is there a firmware for 5i25 with 7i77 on port 0 and 7i74 on port 1?
Sorry, It has been a while and I don't know where the files are....lol

Bob

machinedude wrote:

it was on a belt drive with an omega style configuration.

I should have looked back in this thread - you did post some pics of the arrangement.

Sounds like excessive belt tension is the culprit - maybe in conjunction with a defect in the motor shaft.

Any room to mount a bearing on the motor shaft outboard of the timing pulley?  Or drive an intermediate shaft which is supported at both ends using a typical flex coupling (oldham, lovejoy, etc.)?

I forgot to mention that Flex GUI is the only Qt based gui to use Pyqt6, the rest use PyQt5 which is nearing end of life.

JT

I've run into an interesting issue with my NVEM and would be keen to get your perspective on this. I've been trying to get serial output from the device on the four pin XH header with no luck. Would be good to see the output here as I build up my config and troubleshoot future issues. It would have helped in the issue I had recently where I was accidentally uploading incorrect config files. 

I've probed the signal coming in TTL (Pin 10, yellow signal on oscilloscope) from the MCU, and also out from the MAX232 after conversion to RS232 (Pin 7, shown as the noisy signal in blue on the scope). 
 

To compare, I built up my own circuit with a known working MAX232 chip with the charge capacitors as recommended in the data sheet. Probing my own chip allows me to measure the signal in and out at both TTL and RS232 levels cleanly on the scope so that tells me it's not my 10X probes loading the signal down. This was my initial theory looking at the long rise times. My own circuit was running at 5V so this could be the difference. 
 

I'm not sure why signal coming out of the chip is so noisy. I can see on the board that the chip is getting 3V3 (Pin 16). The board seems to be missing one of the charge pump capacitors (C4 in the datasheet on V-, pin 6) and I wonder if this is the issue? The V+ and V- (pins 2 and 6) shows 4V across them which tells me it's doing something to multiply the voltage needed for RS232 transmission. 
 

I could desolder the chip and see if it behaves properly with all of the recommended capacitors per the datasheet but at that point I'll probably just bypass it and run TTL out to an FTDI module. I see the NVEM manual says that the XH header has "undefined" behaviour so I was surprised to see the MAX232 chip there if they didn't intend to use it for a documented feature. 

The PCB says it is a V6 dated 2022. Has anyone else experienced this issue? What do you typically see on the TX Line on the XH header?