tag:blogger.com,1999:blog-5001794558945659136.post1398011599769200014..comments2024-03-29T05:53:36.579-05:00Comments on Mark Rehorst's Tech Topics: More Sand Table Updates- Making It Run QuietlyUnknownnoreply@blogger.comBlogger10125tag:blogger.com,1999:blog-5001794558945659136.post-26757622729886163092022-09-01T14:00:33.831-05:002022-09-01T14:00:33.831-05:00The file linked in the comment above contains the ...The file linked in the comment above contains the servo and NEMA-23 1:5 stepper drives. First make everything invisible except the corexy mechanism. Open the corexy mechanism component and make the steppers visible.Mark Rehorst DMDhttps://www.blogger.com/profile/13616282129430791353noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-51554892922136751792022-08-31T15:24:53.661-05:002022-08-31T15:24:53.661-05:00Is it possible to download the Nema23 5:1 Fusion 3...Is it possible to download the Nema23 5:1 Fusion 360 version? I only found the latest file for the Nema17 servo motors.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-47219103318315076302021-01-28T08:02:47.724-06:002021-01-28T08:02:47.724-06:00You can access the Fusion360 archive here: https:/...You can access the Fusion360 archive here: https://drive.google.com/file/d/1_k5y-cUWrbwc6-ucCo1NoVY_n7yL5a8K/view?usp=sharingMark Rehorst DMDhttps://www.blogger.com/profile/13616282129430791353noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-35536168262890470242021-01-27T12:31:48.238-06:002021-01-27T12:31:48.238-06:00Hey there,
Where are the .STL files? I cannot ext...Hey there,<br /><br />Where are the .STL files? I cannot extract them from the drawing. Would be great if the files were individually available somewhere. <br /><br />Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-16320786450843506592020-06-30T08:51:21.102-05:002020-06-30T08:51:21.102-05:00That looks like it runs very smoothly! Are the mot...That looks like it runs very smoothly! Are the motors quiet? Keep me posted on your progress.<br /><br />Have you seen my latest sand table post? I installed servomotors and it draws patterns at 1500 mm/sec with acceleration set to 20,000 mm/sec^2.<br />https://drmrehorst.blogspot.com/2020/04/the-spice-must-flow-gets-servo-motors.html<br /><br />I'm working on the final design for the whole table now- I'm going to leave the servomotors in it permanently- they run more quietly than steppers, even with all the tricks I used to quiet the steppers.Mark Rehorst DMDhttps://www.blogger.com/profile/13616282129430791353noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-16961057951727006762020-06-29T20:43:16.708-05:002020-06-29T20:43:16.708-05:00It's built! Stopped overthinking the legs. Tab...It's built! Stopped overthinking the legs. Tabletop and paint to come. https://youtu.be/VV8uPtPWkMwDanielhttps://www.blogger.com/profile/13890648911094881608noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-83385564540755050732020-02-11T08:44:13.423-06:002020-02-11T08:44:13.423-06:00I think your table will be very wobbly in one dire...I think your table will be very wobbly in one direction because of the thin plywood legs. You're going to need some braces to keep it solid. I'm not sure sliding wood on wood is a good idea- it will be interesting to see if it works and how quickly it wears. Please keep me posted.<br /><br />MRMark Rehorst DMDhttps://www.blogger.com/profile/13616282129430791353noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-86607902520358923142020-02-10T19:21:55.625-06:002020-02-10T19:21:55.625-06:00Thanks for all the great CoreXY info. I've tak...Thanks for all the great CoreXY info. I've taken your layout advice and am working on the acceptable furniture problem. In my design a plywood skirt creates a 600x960mm working area, with longer sides that extend past the working area to create compartments for the motors and pulleys on each end. The belts passing through holes in the corners and belt tension will hold the corner pulleys in place. The X carriage would be 3/4" up from the base so that it could slide on a couple more pieces of the plywood - owning the precision requirements of a sandbot. Instead of a magnet the tool is visible above the sand, unless that arrangement turns out to be too dirty.<br /><br />https://gmail360023.autodesk360.com/shares/public/SH56a43QTfd62c1cd968878e392def5cb895Danielhttps://www.blogger.com/profile/13890648911094881608noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-59526083907552268242020-01-27T09:25:03.581-06:002020-01-27T09:25:03.581-06:00Yes, I switched to a Duet WiFi controller board an...Yes, I switched to a Duet WiFi controller board and 256:1 ustepping which helped with the noise level, but now I get some quiet hissing noise from the motors whenever they have power. The controller allows me to shut off drive to the motors when the table isn't drawing, and while it is drawing, the other noise masks the hissing from the motors, so it isn't a big problem.<br /><br />I am in the process of redesigning the mechanism to use ABEC-5 ball bearings as pulleys instead of the cheesy, squeaky 3D printer pulleys I used. I'll post an update when it's ready.Mark Rehorst DMDhttps://www.blogger.com/profile/13616282129430791353noreply@blogger.comtag:blogger.com,1999:blog-5001794558945659136.post-12651582104912720772020-01-27T07:19:45.564-06:002020-01-27T07:19:45.564-06:00Wondering if you tried Trinamic stepper drivers as...Wondering if you tried Trinamic stepper drivers as you worked to make it quieter? I am planning to use GRBL with Trinamic drivers...<br /><br />Awesome work and updates !!gnhttps://www.blogger.com/profile/01958753505548347643noreply@blogger.com