Latest Lightburn can´t download the file to the Ruida controller, but 0.9 can

[Makekit (Henning Pedersen)]

I have file with a few different layers, and when I download them to the Ruida, the file disappears and cant be cut. The same file can be downloaded fine with March 15 version of LightBurn. I use Mac os 11.2.3 Big Sur. I tried multiple times. Sometimes if i remove many parts of the design, it can be downloaded, but I can´t pinpoint one specific error. Hope this can be fixed in future versions. I can provide the file to support/dev people if needed.

[Rick (Technical Evangelist)]

This is a known issue with some Macs over USB to Ruida. We are working to resolve. This is worth review.

Version 1.0 - MacOS issues with Ruida

I think I finally understand what’s happening on MacOS / Ruida / USB. Apple has a bug in the driver that talks to the FTDI chip - it’s ignoring what’s called ‘hardware flow control’. Similar to a conversation between people, it’s possible for one computer to send data to another too quickly. If the receiver starts to backlog, it can turn on a signal that says, “hold on” to the sender, then when it gets caught up, it turns off that signal and the sender resumes. After a lot of digging, I foun…

And a little more…

@LightBurn

I’ve tried to tell so many people this, but the ease of USB makes it very attractive. We’re genuinely considering removing USB as an option altogether if I can’t figure out a way to make it reliable.

I have a side project we’re working on, using a Raspberry Pi as a relay. It would plug into the laser with a network cable, and connect to your home WIFI network, and LightBurn will talk to the laser through the Pi. Simple setup, will cost about $50 (price of the Pi, power supply, SD card and cable), and throughput is 600kb/sec in testing. Not ready for release yet, but getting there.

[Makekit (Henning Pedersen)]

Thanks a lot, I will test this version. May I suggest a pop up warning with a notice about this and a “don´t show again” checkbox, that appears everytime you press the download button on a mac/ ruida system? It would really explain a lot of errors i had the past 12 months.

[Makekit (Henning Pedersen)]

Rick, should I also install the patch “critical patch for your version 1.0.02?”

[LightBurn (Oz)]

Yes - we’re trying to figure out a way around the Mac issue, but as far as I can tell, it looks like something is broken in the MacOS driver.