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DoESLiverpool
Tony drifting off course, error "alarm lock"
Tony was engraving a sizeable piece of acrylic (about A2), and fairly early on drifted off course quite dramatically and threw up the following errors:
Here is how the engrave turned out, it seemed to at first gradually drift and then suddenly slipped very dramatically off sideways.
1 - engraving doing okay 2 - starting to slip off to the side 3 - jesus take the wheel
I had to replace the third image on account of not paying attention whether i was copying all visible or just the top layer from gimp - sorry. fixed now.
I tried engraving (with 90 degree set) today. The engraving was very skewed. There was someone in cutting this morning, with no engraving, and they didn't seem to have any issues.
Right now I'm just cutting simple things, no engraving and there's a lot of jumping/skipping in the y-axis. I can't get over the jumping issues even though I cut it into very small pieces.
Hi all, spent a bit of time on Tony last Thursday and managed (I think) to get the servo lock significantly improved on x, but at the price of it becoming completely scrunched on y.
If it was a stepper-based system this would be simple to set up, but Tony uses stepper-to-servo hybrid motor controllers and they are proving very problematic to "tune".
There is a "sweet spot" to be found between limit, gain and damping, but it is proving elusive, if anyone has experience of servo drive tuning, some help with this issue would be very much appreciated.
We're going to focus efforts on getting Gerald back online then retrofit stepper motors on Tony, arguably a downgrade from the existing servo drives, but they "just work", and as long as they have enough current to overcome momentum they don't lose registration (steps).
This issue was reported again today, just documenting here ftr
A bit baffled by this - I used Tony to do an (almost) A4 sized engrave last thursday without problems. I wonder if the issue is with the software stack, rather than the machine? Since the last round of servo tuning it has been behaving very well. Sean
On Monday, 9 January 2023 at 20:19:51 GMT, huffeec ***@***.***> wrote:
This issue was reported again today, just documenting here ftr
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