The irony isn't lost that The Chinese clone of a Chinese controller is lacking some integrity on the copy, but I'm sorry if that's rubbing salt in the wounds. But therefore we know that there is use for a customized load, and it may be worth it to you to flash to a known quantity from the official kernels, so you know there isn't something custom going on. But looking t the Lasergrbl site, it has customized 1.1f that only homes on X and Y, which I think I will try, as it's annoying to always have my Z get blown away on a homing operation.
Woodpecker 3.2 grbl probe update#
I haven't personally delved into the sausage-making machine to do an update on mine, I'm still learning as it is. The release notes allude to an update to a "nonlinear spindle speed/PWM output option via a piecewise linear fit model." So that may answer your question on there being a setting you could change. You can flash new firmware, mine is at 1.1f, and is a woodpecker, but I see that the there is a 1.1h, the current release.
![woodpecker 3.2 grbl probe woodpecker 3.2 grbl probe](https://i.ytimg.com/vi/gi1ZA1zfVo0/hqdefault.jpg)
(Set up for a laser, so $30=1000 by design): < Grbl 1.1f Here is my current $$ config in case it helps at all. I have my scope packed away and currently have my laser connected, so I'm afraid I can't replicate your experiment on my Woodpecker at the moment. (Since you obviously know your way around a scope, please forgive me if I'm telling you what you already know, more trying to inspire a eureka moment for you.) (I hope that wasn't as confusing as it sounded.) IOW, at your setting of $30=1000, every increase of 4 more or less will increase to the next step on the PWM duty cycle.
![woodpecker 3.2 grbl probe woodpecker 3.2 grbl probe](https://i.ytimg.com/vi/x3cKRkuiDBk/maxresdefault.jpg)
Woodpecker 3.2 grbl probe code#
Now I know that this mainly affects how GRBL code is interpreted is a percentage of max, but is there any difference if you put in a value of, say, 8000 or 10000 instead? It's supposedly 255 steps on the PWM, so it will divide $30/255 and then whatever value you put in for spindle speed will bracket around 255 slices proportional to the max. You have $30=1000, which is telling it that the max spindle peed is 1000rpm. I'm a relative greenhorn here with mine, in the Youtube CNC porn stage, so forgive a Captain Obvious question: Is it possible to flash custom firmware on these? Is there a setting that can be changed in its config that I'm unaware of? Any Ideas? I suspected perhaps a bad board and had it replaced - exact same behavior. I've probed the gate of the mosfet directly as well as via across a load resistor (2.0 Ohm to approximate the motors dead stop nominal value of 1.6Ohm w/ 611.5uH).įinally, here's the dump from the Woodpecker's terminal: < Grbl 1.1f I also get essentially matching behavior from the little NES style local control it came with - setting it to 10% gives 4.115% duty cycle, 50% gives me 18.84% duty cycle, while 100% is 100% duty cycle.
Woodpecker 3.2 grbl probe zip#
I've attached all scope captures in the linked zip file.
![woodpecker 3.2 grbl probe woodpecker 3.2 grbl probe](https://www.automationdirect.com/images/overviews/rtd_transition_300.jpg)
I plotted all this on the graphs provided to visually see it.
![woodpecker 3.2 grbl probe woodpecker 3.2 grbl probe](https://ae01.alicdn.com/kf/HTB1umr7dgKTBuNkSne1q6yJoXXaQ/New-GRBL-0-9J-USB-port-3-axis-CNC-control-board-engraving-machine-support-laser-engraving.jpg)
Any value set above 1000 also remains 100% duty cycle as you'd expect. It then holds there until roughly setting 995, at which point the duty drops to a lowest point 999 of 3.889% duty cycle - then maxes out at 100% duty at 1000. Even more oddly, I only get to a maximum duty rate of 40.55% a spindle setting of 986 of 1000. When connected to an oscope, I get a PWM frequency of around 554Hz, which doesn't seem to match what anyone else has reported. I noticed the spindle control isn't linear at all, started digging into it, and that became the beginning of the WTFs. So I have what I believe to be a Woodpecker Clone with GRBL 1.1f - there's no model silk screened on it to get a for sure reference ( I've posted pics below).