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Small mini PCs and Rpi appear to be almost same price. (when housing and power supply are added to the purchase)
The Mini PCs have only a volume of roughly 0.5 - 1 liter.
Seems neither space nor $ is a valid argument anymore, considering that the rest of the electrics will take up some space too.

My go to would be the Ethernet based card and one of the mini PCs.

digiex_chris wrote:

That reminds me, is there a way to configure minimum delay time between a DIR change and a movement command? some steppers are more picky about that. I also need to flip the action of the EN pin, my steppers are enable-low and it's currently outputting high when enabled.
 

you can config modifier's to each pin, there are functions like invert, debounce, ...

 

to add an delay between step and dir, you can add a debounce modifier to the step pin, than you have a delayed step signal


 

Hi thanks,

I am trying to get a quote on the EL-8, which is a more expensive/new version but I have seen them work on LinuxCNC through a Raspberry Pi.



I am a little scared to set these up though as there is not much info on doing this from what I've seen. As I also don't have much experience here especially when it comes to the setting up the drives addresses and communication.

I use the attached post processor to do the same (you will need to remove the .txt from the end)

I have a material number 0 in SheetCam and when the post processor sees material 0 it removes any material change and when the G-code is first run it pauses and prompts that the correct material is selected in QtPlasmaC.
 

Did you verify that the feedback is in the correct direction?
it does look like a runaway which would be expected if the feedback is reversed

Also for the orient PID I would set FF1 to 0 and P to say 10
so its easier to see whats happening and you don't get immediate
uncontrolled motion.

This loss of control/runaway may also be because orient PID output sign
does not change the spindle direction (that I can see)
 

Well, I have attached the brochure for 5 axis BOB.

I have used such board earlier.

Now, can I use it through a parallel port of the computer for stepgen while having Mesa 7i92+daughter cards ?

when i try to orient ( m19 r0 ) it speeds up to 1300 rpm which is the same rpm as when i command m3 s1000 and it doesnt do anything.


 

Thank you for your reply. It's very clear and I will read it carefully

the faster the pulse count, and the smaller the unit of measure, at a fixed frequency, the bigger the problem becomes. I am referring to a edge case but it is something to beware of. 

Oh, it is a little baby machine by many measures- 1 kW spindle, 12x6x10" XYZ travel or so, etc. Weighs, I dunno, maybe 500 lbs? I built it with a welded steel frame filled with epoxy granite, with proper linear bearings and ballscrews (to be fair, I got nice THK linear bearings, cheaped out on the ballscrews), so hobby bench mill sized, but with way more rigidity. The BT30 spindle is probably overkill, but it was available, and there's a lot of tooling options. TTS didn't seem like a great option, and ISO20 seemed too small.

Aside from this issue popping up, it's been a great experience coming from the gantry-style machine I'd been tweaking for years. The rigidity, Z height, and toolholders are the huge upgrades, but the MPG, touch probe, covered ways, coolant control, spindle/axis stall-detection, and servos are very nice as well. Having a spindle with enough torque at reasonable RPMs to actually handle (small) drills is still blowing my mind.

Sorry for the crappy picture- literally just walked over to snap it, so you can see it's a bit disassembled for debugging (and with random scrap taped over the t-slots so I didn't have to clean them out). That's a Kurt 4" DX4 vise for scale.