LaserUser.com Forum (formerly RDWorksLab)

Hi All,

I'm wondering if anyone could shred some light on the meaning of a couple of messages I'm getting on my Ruida. Over the last weekend I started to receive the message 'Hard Lim Pro' and then after pressing escape on my Ruida RDC 5121 sometimes it would then come up with a 'Power Off, Enter or ESC' message. I have never seen this message before and can't seem to find an answer on this forum or any of the Facebook groups when searching.

A bit of background I'm fairly new with lasers (9 months) as we got ours second hand laser back in December 2020. The laser was bought secondhand and needs a lot of love of the next 6 months to get it back to a solid working condition. My laser is a 50W and silver in colour. I would say it's between a red and black and a K40 in operation by comparing features like size of bed and laser end parts.
I have done a lot of work recently getting my machine back to working condition after a PSU went which you can read about here viewtopic.php?f=104&t=5866 I have added new vendor settings after deleting them by mistake (such an idiot), Re-aligned the mirrors, fixed leaking tube twice, Replaced PSU unit after the last one failed.

After doing all these jobs the laser had been running well for a week until this message turned up on the display. My ruida display unit is a RDC 5121. I also mainly use Lightburn on a Macbook.

Attached below is images of the messages.

https://linksharing.samsungcloud.com/gz2NiPHRTuOg

I also wanted to say a massive thank you to this group. Its such a great place for support love how everyone is so happy to chip in, thank you.

this is the message that happen when your laser head is getting out of the table and the limit sensors are hit.

at this point, the machine stops automatically, because doing otherwise would come to a mechanical crash of the head into the frame.

also, i believe it might happen if somehow the machine "lose" the position and believes it is elsewhere (lost steps during a job, manually moving the head and not resetting the axes, ...) and get out of the table (also, the table dimension must be correctly configured)

one solution would be to manually position the head near the center of the frame (machine stopped), start the machine and reset axes (if it is not automatic, depends on your machine settings). after that, you can use the control panel and/or rdworks/lightburn to move the head and check if the x/y position is accurate.

you should be able to move to the limits of the table without problem, and the machine should refuse to get further without banging in the frame.