It is protopasta, something about the empire strikes black or something. It looks even better in person (and I hate glitter).
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Aww man! I think that was my favorite.
Yup! Arrakis is taken!
Regarding endstops- I used mechanical endstops initially and kept them from clicking, except when homing, by defining the patterns in Sandify to run from X=5 to X=760 and Y=5 to Y=1600 instead of going from X=0 and Y=0.
I am now using some $3 optical endstops because they are silent, so I can use the full size of the table to run the patterns.
Regarding belts- I donāt see any advantage to running 10 mm belts in a sand table. Sand is not a high precision medium, and 10mm belts bump up the hardware size and cost a little. I made my own pulleys from stacked F625 bearings (6mm wide belts) with printed flanges- they are very smooth, quiet, and will last. I tried 3D printer pulleys with and without teeth and the tiny bearings gave out quickly (maybe too much speed?).
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I am going to guess that the motivation for the larger 10mm stuff is that a) Ryanās stock has all moved that way, and if we want him to sell kits from his garage, he will want them to not be special and b) The idlers work better. The tiny idlers can jam quickly.
But I didnāt design it, Iām just guessing 
.
Iām excited to try 10mm, I havenāt upgraded my low rider and I havenāt built a primo, so I donāt know what the 10mm is like. Maybe I will end up converting everything?
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Unique part count. 10mm stuff uses M5 screws, those work well in plastic, win win.
Optical would be nice all I hear is clicking of endstops
I want to apologize for not getting the beta build done. I decided to paint the conduit, and am waiting for the final coat to dry.
Iāll be stringing the belt up after dinner and getting it bolted up to the table as soon as I finish the positioning jigs. I know exactly how far in from the edge of the table the envelope needs to be so Iām printing a set of jigs that will clamp to the table and allow me to position the left rail exactly where I need it for my table.
Oh, I was using the Y=6 as a minimum for my table for a while. I did the same thing with my first build as I did for the layout above. I made the table able to go to the full size of my sandbox, so ay Y=0 it was centering the magnet over the edge of the table. As a result, when homing. more often than not, it would lose the ball after homing Y and then home X without it. As a result, I set up in sandify an opening sequence
G28 Y
G28 X
G0 Y6.5
G0 X 347 F600
G0 X6.5
This makes for an overly complicated home sequence, but it ensured that the magnet would go out and pick up the ball.
Later, I modified the limit switches, so that they triggered a zero that didnāt lose the ball, and got the āclick-clickā every time the table came to Y=0. Then I also got it catching the arm of the switch if X was already zero when I homed Y. This probably would not have happened if Iād built it right in the first place.
The optical switches Iām using have mounts differently placed from the SPDT switches that are normally used, theyāre slightly larger and spaced further apart (19mm IIRC). They just need something to block light between the sensors. They also trigger low, so the firmware has to be told to expect a low signal instead of the high signal that they get with NC wired switches.
With this design, the X switch is a no brainer. I expect that it would be simple to adjust. The trick with the Y switch (The important one for noise) will be adding something to the truck to trigger the endstop, and figuring out how to make it adjustable.
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Sorry everyone I was a little distracted removing a tree today.
10mm is not needed 6 works fine. The main reason is the entire build has pulleys, idlers, m5ās, and M3 screws for the steppers. The instructions will be dead simple, I do not have to buy anything new except some mini wheels to my inventory, and the bearings in the larger idlers last 100xās longer than the M3 6mm stuff. My new mantra is simplify. If it takes me 3 days longer in CAD to use the same parts instead of what randomly fits (lowrider) it will save me hundreds of hours of emails and the forums will not be full of questions about screw sizes and positions, and other random build issues.
Whao buddy slow your roll, I am not in a rush. Take your time, enjoy it, donāt feel the need to add a time restraint to anything. I donāt have inventory for kits right yet anyway so you are not holding anything back.
Regarding the homing sequence: another way to move away from the endstops will be:
G28
G0 X5 Y5
G92 X0 Y0
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That is going to be some serious organization!
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NextZeneration?
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hello boys and girls
I do not know if it will be the place, I just wanted to say that perhaps one of these plates will make the kit more economical, my doubt is the connection to the LDC (only 1 conector), forces to install tft 24 /35 etc ", but the whole kit is econmic, including the TMC drivers and wifi module
as always, sorry for my english
greetings from Barcelona
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Thatās why Iām trying to use fystec cheetah v1.1b board, it has tmc2209 and cost only 23ā¬
And have onboard 12v and 24v, and it can drive motors from 7v to 35v. Dirt cheap !
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I use this board on my ZenXY. The wifi module is worthless, but everything else works well.
Well, it seems that Iāve turned too much of the bottom of my table into swiss cheese. Two corners have holes too close to the corner mounts already, and I canāt get the parts to stay still when the belt is even moderately tensioned. I have another table, but havenāt cut the opening for the sand table in it yet. Maybe Iāll just make a test boardā¦ I have some ideas there, I just need something that I can waste some of.
Iām also having endstop switch issues, I have to replace the switches that I tried installing. I seem to have misplaced the bag of switches that I bought for this purpose.
Bummer I had to replace my screw with larger ones as well.
I have some switches headed your way.
Thanks for your answer, I have ordered a motherboard, as soon as it arrives I test and comment, especially a wifi module.
Here is a pretty reasonable grbl board, the m5 base board, with touch panel is pretty reasonable as well. Wish these were the more quiet drivers
Actually, wonāt met me post links. Google for ām5stack grblā
I donāt see any plugs for endstops, after my first tests without them, itās a must have feature for my next build.