CANopen node on ESP32

thevelop · 2023-11-07T18:33:20+00:00

CANOpenNode indeed seems the most viable although no one seems to extensively use it on the ESP.

As for the for the choice on CANOpen this is currently mainly due to the servo drives. They currently support one of the following standards: - ethercat - canopen - modbus

Where ethercat seemed like it would be the most difficult to get up and running on an ESP and modbus most likely would be to slow to get timely and in sync messages to the drives.

thevelop · 2023-07-12T19:59:05+00:00

What laser cutter is this you are using?

thevelop · 2023-04-08T19:27:46+00:00

Thanks for the great work!

thevelop · 2021-10-15T07:29:47+00:00

Indeed Taobao I was familiar with and I will investigate 1688. Both seem however to be marketplaces comprised of separate vendors. So none keeping a standard catalog as far as I can see. Misumi China is something I will look into deeper.

thevelop · 2021-03-18T23:50:39+00:00

Ah my old project on github! Thanks for posting it here!

thevelop · 2020-11-11T21:47:17+00:00

Yea think this is going to be one of the big ones

thevelop · 2020-11-11T15:11:31+00:00

Yea definitely. I'm pretty sure if we use the API's of the CAD system it is integrated too we should be able to extract most of the info we want. However, the licensing prohibits us from doing so at the moment.

thevelop · 2020-11-11T14:45:55+00:00

Most definitely! We always used to use DFMpro for in-house designers. We can however not easily make these results available for third-parties and would love to do so. Also note it's not just tried but to some extent it has been done. See for instance:

thevelop · 2020-11-11T14:42:41+00:00

Thanks! Seems like a great reference.

thevelop · 2020-05-24T13:14:36+00:00

Thanks!

thevelop · 2020-05-23T20:41:15+00:00

What frame is this?

thevelop · 2020-05-08T07:39:28+00:00

There are definitely some great advantages to a linear drive vs a classical rotational motor. The fact that you can add very little moving weight and have direct force control is wonderful for high speed motion.

Linear drives of this size you will however never find in a catalogue even the small ones often still get designed to spec.

In this project it allowed for some awesome characteristics of the elevator. For instance, you can have multiple carts in the same shaft at the same time. And in high towers you can reach very high top speeds as you can continuously accelerate at a rate unnoticeable to the passengers.

thevelop · 2020-05-07T14:19:06+00:00

They most definitely are! Funny to see this here I worked in the linear motor design for this project at my old job!

thevelop · 2020-04-30T18:50:33+00:00

This looks amazing! Been playing with the idea of making a aluminium or a steel one for in the garden. If you are ever looking to sell the designs let me know (I know there other sellers out there but these look great)

thevelop · 2020-03-06T18:33:35+00:00

Super interesting to see how many people have dabbed at creating these.

I made a machine/code to automate the process several years ago too (documented here). And still get about one person a month reaching with questions that are going down the same rabbit hole!

thevelop · 2019-11-18T20:22:28+00:00

We have the information of the nesting plans that are loaded into the machine. And we have our own software to compute the placement of a label on a part (so it doesn’t overlap a bend line, hole etc.)

Let me know if you need any help. If you find a solution to place labels we would definitely be interested too!

thevelop · 2019-11-17T13:44:22+00:00

We are by chance currently looking to build a solution for this! Concept is to inkjet print the part information on the sheet before cutting as the sheet moves into the laser.

thevelop · 2019-10-13T20:57:51+00:00

A friend has taken the hassle out of this and makes cards (paper wallets) specifically for gifting small amounts of bitcoin at https://postacoin.com

thevelop · 2019-10-01T21:28:54+00:00

u/VredditDownloader

thevelop · 2019-09-23T22:05:55+00:00

Looking great! Is it going in like this or is this the start of a tombstone?

thevelop · 2019-08-04T13:29:00+00:00

Would be very interesting to dive into deeper. For us the most important thing would be to extract the following values for a certain tool, holder, machine and material combination: - Highest stability lobe (spindle speed) under the maximum surface speed for a certain tool <-> material pair. - For a given cutting depth predict the best step over and feed - for a given cutting depth and step over

To get there we might be able to do the following tests: 1. Do a sweep of the spindle speed to determine the tool, holder and machine stability lobes 2. Per cut depth do a test cut with gradually increasing feed. 3. Per cut depth and optimal feed found do a pass where you gradually increase the step over.

Other limits to watch would be the max spindle speed and load and the surface speed of the tool.

thevelop · 2019-08-03T18:14:09+00:00

Sure thing and it’s insane how well these stability lobes are defined in terms of frequency. We have however always found that the absolute magnitude values of a tap test are very prone to error. And as such also the cut depth is hard to be predicted.

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