All, Thanks for all the help and posts on this board. So if I am building at 1000mm x-axis with a dual 1000mm y-axis I plan on using openbuild nema 23 with 345oz of torque, sku# 596. But for the z-axis any reason why I can not use openbuild nema 23 with 175oz sku # 518, since the Z-axis should not have that torque. Or am a missing something? With my countless hours of reading and watch youtube videos. I discovered the tinyg vs the Xpro V3 controller a difference with 1/8 vs 1/32 stepping. So any thoughts on differences with this 1/8 vs 1/32 limitations.
I have both boards that I used to upgrade a Shapeoko kit. My initial preference has been Xpro V3 because it is smaller, I can use easel, and i could use grbl panel with it (much easier for a noob to use than the tinyg software).
Thanks. What size is your cnc. What size motors did you use. I concern on the amps the pull of 3.amp. The f enrollees both said it uses 2.5
My CNC is fairly basic, so is only doing a cutting space of 12 inches x 12 inches and is using NEMA17 motors. I have hooked up the xpro to NEMA 23 motor with a max peak current of 2.8A and it worked fine (I have a c-beam bundle I am playing around with).
Limine3D, So the NEMA 23 you have whats the torque on those? Openbuild has 2 nema 23 with different torque. Did you get these via overbuild or other sources? I am just curious if some of these NEMA 23 with 3.0 or even 3.5A will work with the Xpro??
The torque on my motors are 175oz-in and I got it from openbuilds. Unfortunately because the board is rated for 2.5A I would be reluctant to try a higher amped motor. A better option might be to get individual stepper motors that can handle 4+ amps if you are looking for that kind of thing. The thing with these here contraptions is they can get expensive quick, so I tend to buy within my budget, break it, then upgrade it!
Because of cost I was looking at getting the same motor of nema23 175oz. I not sure the near double the cost of the 345oz touque is needed.
My version of the Ox is a lead screw driven 1500 mm Y by 850 mm X and I use 269 oz (Or were they 270?) NEMA 23s on the X and Y and a 175 oz on the Z. It looks like the Parts Store no longer carries the 270 oz. I have a Makita 701 c router as my spindle that the Z needs to support. Last night, I easily cut in one pass 1/4 plywood with a 1/8" single flute bit at 3000 mm/min at setting 3 on the router which is 17000 rpms. I was able to cut 3/4 inch particle board in three 6.35 mm passes using those same settings. I could probably do it faster, but I did not see a reason to try. I have also cut aluminum plate at 700 mm/min at .2 mm depth of cut with no issues. I may try faster or deeper next time to see what happens. All that being said, there may come a day when I upgrade my two Y axis motors to the high torque. I would have started there if they were available then. I use the DQ542MA drivers (4 total) and an Arduino. I like this setup because it is only about $50 more than the Xpro if you buy a "real" arduino board (knock $10 off if you use a clone) and you can give the motors the amperage they want without worrying. I also noticed the DQ542MAs seemed smoother than the DRV8825 which I started with, which would occasionally miss steps due to overheating even with a fan blowing on them. My Z stepper also seemed to run much hotter with them. As for the price of the high torque, they are only about $15.50 more for the three you would need totaling $46.50. I believe you will easily get way more than $46.50 worth of performance out of them and with the price of the total build, $46.50 is not a large overall percentage. I feel the same about the DQ542MAs. If you fry one driver, you replace one driver. With an all in one board, that becomes much more difficult.
I am finding lots of good info on programing the tinyg controller. But it has the 1/8th stepper limit vs 1/32 on the CNC xpro V3. But trying to find info on programing the board seems to be a issue to me. If anyone has any good sites on the software config for the board will be helpful. I trying to figure out what drivers I need for windows or raspberry to run ie grbl panel or universal gcode loader. Thanks
1/8 microstepping is plenty for a CNC. It is what I use and my steppers run smooth. I may try 1/4 just for fun. I don't think you would notice the difference between 1/8 and 1/32 on a CNC router or mill. 3D printer - maybe. This is a good read. Micro stepping Myths and Realities
Thanks, This helps a lot. Make my decision easier. I have my ordered all the hardware yesterday afternoon. Now it makes some of my electronics easier. Now the wait game for things to arrive. Thank you
thanks Giarc, for the information. Like I said before, my experience is just from experimenting with a shapoko. I would love to see a post on using the motor drivers on here or even on instructables.
