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In addtion to heropups excellent reply - if you do notice the middle getting a little shy in the sand department, you can of course remove the glass and brush sand from the "terminal berm" (hill of sand around the periphery). But alternatively, a more elegant solution is to create a playlist consisting of two tracks: "e10" followed by "apache". Run the playlist in Order (not shuffled), with repeat on, and let it go all day (or over night). You should find after repeated runnings, that there is a net increase of sand in the center.
... as gears skipping. So i started dismantling the table to determine where the problem WAs, and nothing i removed stopped the clicking/stalling. Eventually i had the belt disconnected from the theta motor and it still kept stalling.
It makes sense that it WAs the theta motor stalling, as the ball would just move slowly outwards while the theta motor WAs stalled and the rho motor i guess WAs attempting to match the rotation it assumed the theta motor WAs doing to keep rho constant/moving at the correct speed for the pattern.
Next i took the motor out and dis ...
As part of my sand pattern maker project I added support for saving artwork to the Theta-Rho (.thr) format, as well as support for taking .thr files and plotting them in rectangular coordinates.
I'm new to creating Node modules, but I've built upon my existing code in Order to create a CLI to convert a CSV of x,y coordinates to thr coordinates.
It's available at
I have plans to build it up more, but I WAnted to share it sooner than later. I'm open to improvements and collaboration - just submit a PR!
Thanks,
Mark
I can tell you how I got that. I got rid of the big fat line underneath. I thinned the text, kerned it, and scaled it a bit in Order to try to make it more legible. I then added a thin line underneath the text and made sure that each letter just barely touched it.
When I had a file I liked I uploaded to Sisyphus for the Rest of Us and had it create a .thr file.
I went through several iterations of tweaking it. I'll attach the .PNG of my most recent attempt.
Attachment : Mariposa8.png
There are four types of tracks: center-to-center, edge-to-edge, center-to-edge, and edge-to-center. When you start playing a track, that track always plays in the Order that it WAs written. When you play a "playlist" with multiple tracks, the software will stitch together "compatible" tracks, and this includes flipping center-to-edge, and edge-to-center tracks to play in reverse, depending on where the previous track ended. So if you put your user-created tracks (I'd be honored if that including some of mine!) in a playlist then the C/E and E/C tracks might ...
... to change the Order of tracks being played in the current list. (basically to have a WAy to seamlessly select the next track to play without interrupting the current track and forcing a whole homing sequence).
Also, this is a bug, I guess -- I have noticed that when a list is playing and I select a new track to play in that list, the track I select is skipped and the next track is played.
I am still all agog at my coffee table and happy as a clam at high tide. However, I have a couple of suggestions that may spare others the struggles I experienced as I set up this glorious device.
- Include an extra tab of teenie-weenie rubber bumpers. They are more than just teenie-weenie: they are itsy-bitsy, and human fingers are comparatively big. An extra tab of bumpers will allow for flying bumpers, misapplied bumpers, and bumpers hijacked by the cat.
- Ditto for the felt feet. The expense will be minimal.
- A very light ring printed on the fabric will guide the user in spreading sand. A bit more expense than the extra bumpers and feet, but this will make life easier for users .
- Most important: The app is dandy, but connecting to a wifi net is unnecessarily a cluster-fig. Make it clear that in Order to connect to a local network, the user must first join her phone or other device to the Sisyphus network advertised by the Raspberry PI, and THEN try to go to Community, where the user learns that she is not connected to the internet, and is there, finally, afforded the opportunity to login to a network. This took Me at least 45 annoying minutes to figure out. Intuitive, NOT.
- I've never before joined a forum without a search utility. Either it is cleverly hidden, or it has not been configured.
Overall, hats off to Bruce and Micah. I am blown away.
... end) as they are added - and if a connector will be added. You can change the Order of tracks in a playlist by editing the playlist and hovering over a track, then dragging it.
The other thing to be aware of is that tracks can be set to "not reversible". Normally, "01" and "10" tracks are automatically reversed as needed to avoid connector lines. But not if the track is set to non-reversible. You can change the setting by clicking on a track (in the library) and viewing its settings.
Lastly - when you play a playlist, if you choose "shuffle" it will do it ...
I had a very brief power outage here (2 seconds or so), and afterward my 2-ball RGBLED coffee table is dead. After previous short power outages, the table reverted to hotspot mode, which WAs easily fixed, if still somewhat annoying. But this time, even after power cycling the table multiple times, the ball doesn't move, the table doesn't light up, and it doesn't join my WiFi network or show its own hotspot network. There are some blinky lights on th hardware under the table, but that's about it.
So I'm resigning myself to having to reimage the SD card, w ...
... to an enhancement request.
I'm finding that the Erase track does not always play at double speed as it should. It seems to occur more often when it is played in reverse (outside in). Just after my most factory reset, I noticed that the standard direction played normally. But then I WAnted to play a "01" track on an erased canvas, so in Order to force the Erase track to play in reverse, I created a playlist that contained my "MoveOut" track -- whose only instructions are "0 0" followed by "0 1", then an Erase track that would play in reverse, and then my ...
I can't answer the question about backups, but I can provide some background on the Dropbox tracks. Before the Community tab in the Sisyphus app WAs functioning, some of the earlier recipients of the table (mainly through the Kickstarter campaign) had learned about the track file structure and developed some of their own tracks. The browser version of the app allowed uploading of track files from the computer directly to the table. So in Order to share tracks, some of us uploaded them through various Methods (e.g., Dropbox, GitHub, etc.) to make them avai ...
... talk about polar vs SCARA design.
Also check out "Zen Table" by Simon Hallam, he WAs one of the first ones to commercialize the concept a few years before Sisyphus, but he used a cartesian design. We believe SCARA is superior to both cartesian and polar and a much more elegant solution that opens the door to very unique possibilities, like our Stelle design, which would be impossible with either one of the other Mechanism types.
This WAs one of the responses to the comments in the campaign, and I found it a bit disingenuous, to say the least, because the ...
@mdolfis: By design, the WAy tracks are played, there isn't a distinction between "center-edge" and "edge-center." Here's how it currently works, and this includes the erase pattern.
If the next track to be played is "center-edge" or "edge-center," wherever the ball has ended, the table will automatically read the next track in forward or reverse Order so as to not need to jump from edge to center or vice versa. So for example, if the current track ended at the edge, but the list of coordinates for the next track begins at the center and ends at the edge ...
... My power supply and step down converter are able to power the accessories noted above, along with the Raspberry Pi, and motor hat without breaking a sweat.
Now, on to the prototyping stage!
In Order to make real progress, I had to make the hard decisions about the physical limits of my table:
The Rho is going to be from 0 to 1 with no overrun. I don't need to WAtch out for the ball parks, because they won't be in the drawing area.
The radius for the drawing area is 171mm. This fits tightly inside the legs of the table I bought. There is a bit of extra r ...
... my TRS-80 I discovered x=sin(t) and y=cos(t) for clockwise from 12 and it WAs only later in school I learned the "correct" WAy of doing counter-clockwise from 3. I also work now in an industry where if there are multiple WAys of doing something you can be assured they are all in common use (although I'd love to have a talk with the genius who decided bottom-up raster images made good sense after decades of them going the other WAy). So when programming the Sisyphus I just observed how it acted to the coordinates I sent it and went from there, I never once f ...
I am building my own accent table for my office at work. I am going to add a Mechanism inspired by Sisyphus design, but completely from scratch, with my own software and control. I can post updates if Bruce is OK with it.
Question:
In Order to use community (I also WAnt to publish) tracks, I need one bit of information that has conflicting posts. What direction would this .thr file be drawn?
(0,1)
(314.159,0)
Positive theta. Is it CCW or CW?
There are many posts that explain that theta "home" is at the "top" of a freshly homed start. There are also pos ...
Thanks for the response. I have my table in my office at work and so I don't have the ability to make these changes at the router level. Are there any other options?
Note: I'm not sure on the details of what constitutes a "hidden" network. The WiFi networks at my office are visible to anyone, they just require both a username and password in Order to connect to.
I have an iPhone with a mobile hotspot. I tried using that as well. But, oddly, the table doesn't find the mobile hotspot on the list of networks available even when, for instance, my laptop computer does. Do you have any suggestions along the lines of how to enable the table to connect to a mobile hotspot on an iPhone?
Thanks
We had a recent server issue that resulted in some tables loading pre-release firmware. If you were affected by this your table will have firmware version 1.9.9 on it and alert you of a new version, currently 1.10.7, but will not update.
Currently there are three resolutions to this.
Replace the SD card with a new one that has updated firmware: If you'd like a replacement SD card, send your mailing address, name, Order number or backer number to [email protected]
Advanced - manually update your firmware by connecting to it using SSH: see this article for the steps: Update Firmware using SSH
Advanced - re-image your SD card: see this article for the steps: Steps to re-image SD card
In the Mean time, be aware that you are not currently missing any features as a result of this issue. However, you will not be able to update your firmware until one of the above three options is taken.
We have only seen this issue on tables with firmware version 1.9.9. If you're experiencing similar issues on a version other than 1.9.9, please email details to [email protected] prior to taking the actions listed above.
We're very sorry for the inconvenience and are continuing to develop our firmware and server for increased robustness and a better user experience.
Micah Roth, COO
@brantharradine, We had a recent server issue that resulted in some tables loading pre-release firmware. Currently there are three resolutions to this.
Replace the SD card with a new one that has updated firmware: If you'd like a replacement SD card, send your mailing address, name, Order number or backer number to [email protected]
Advanced - manually update your firmware by connecting to it using SSH: see this article for the steps: Update Firmware using SSH
Advanced - re-image your SD card: see this article for the steps: Steps to re-image SD card
In the Mean time, be aware that you are not currently missing any features as a result of this issue. However, you will not be able to update your firmware until one of the above three options is taken.
We're very sorry for the inconvenience and are continuing to develop our firmware and server for increased robustness and a better user experience.
Micah Roth, COO
@Don,
"Can anyone point Me to some reading material that might help Me progress into a more complex track making game?"
Welcome to my world! First off - although I'm pretty sure when it comes to sand plotting, I have more area under the curve than most - I'm no authority. But with regard to compexity - I would divide it, for now, into those tracks that are generated algorithmically, and those not. So the pumpkin track, and any tracks that you recognize (including text), are non-algorithmic. All the others -'crop circles', spikey or swirly/loopy spirals, and fractals - are created via multilayered recipes (instructions) -aka algorithms. Both branches are infinite design spaces. Markyland created Sisyphus For The Rest Of Us so that people could more easily explore non-alg space. If you're interested in algorithmic pattern space - start googling. All you need to do is place the connect-the-dots in the right Order :).
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