Merlin246

While I do not posses the ability to sing well I have a great appreciation for those who can. Coupled with my love of musical theatre I have many favourites, but certainly near or at the top of the list is John Owen-Jones. Here he is signing an optional high in The Prayer - Les Mis. This top belt on the word "let me die" has a unique quality to the voice that I cannot quite place and is also in stark contrast to the brighter less operatic notes around it. If anyone has some insight or analysis of this I would appreciate it!

Video at timestamp here: https://youtu.be/NeH6lD0R5RY?t=146

Hello,

I am a mechatronics engineer who works primarily in a mechanical capacity. However I like software and am slowly learning more and more (but EE can piss right off).

I have developed a recent infactuation with deterministic communication protocols, specifically EtherCAT due to it's widespread use in multi-axis systems (like CNC machines) and general elegance while delivering high performance. However in researching more about it I learned that it is common to have non-deterministic protocols used on-PCB in EtherCAT devices. Why is this? Surely it is a detriment to the overall system if an EtherCAT servo drive uses SPI on the PCB to communicate between microcontrollers, which, while

Hello,

I am moving to SF very soon and will have a commute to/from the Cal-Train everyday that I'd like to use an escooter for. This commute distance is ~3miles each way but with some considerable hills (Protrero Hill) in the way. I also want to use it for getting around the city. Some of the hills of places I commonly go get up to 25% grade.

I am looking for something reliable with good performance, 25-30mph top speed, can get up hills (I'm 195lbs), 20mile+ battery, foldable. I've seen a few recommendations from other, similar posts such as the Kaabo Mantis 8 (or 10) but am open to other brands/recommendations. Trying to stay under $1,500 USD.

Thanks in advance!

Hello!

I am looking into getting an escooter for my commute. This will be a few miles each way in San Francisco and it will have to go up some pretty decent hills (25% grade). I'd like something that can go at least 25-30mph, and carry me up the hills without assistance (I'm ~195lbs). Budget of $1,500USD and willing to go a little beyond that if there is something really excellent.

This won't be used for off-road, strictly for city commuting/getting around the city. It should also be foldable as I will need to carry it on a train.

Thanks!

Hello,

I am going in for a interview at a company I'm very excited about. While still young in my career (3yrs incl. 1 yr internship) I've been working on quite complex projects as a DRI (startup life).

I will be presenting about my most complex project to showcase my engineering, thought process, and competency. This is a multi-arm robotic workcell. There is a lot of information I can include in the presentation but I don't want it to be too dense so I am being thoughtful about what I include.

What to you makes a great technical presentation? This one will be 10-15mins in length with questions afterwards.

Hello,
I have an application where I need right angle connectors however the clocking of the port is 180deg from the direction I want it to be. I cannot use field-wireable connectors for this as they would be too large and I cannot change the clocking of the receptacle.

I need an M8, A-code, 4-pole 90deg socket to pigtail cable at least 50cm long. Anyone know where I can find one off-the-shelf? My searches at IFM, Murrelektronik, and Automation Direct have turned up nothing.

Hello fellow engineers!

I am in the thralls of sensor selection for a project and struggling to find a sensor that meets my specs and isn't ridiculously expensive. I need to measure the distance to a anodized aluminum plate outdoors to reasonably high accuracy and precision, a simple threshold type measurement will not suffice, it must be the actual distance.

Requirements

1. Measurement range: 60-100mm.

2. IP65 or better.

3. Accuracy <=0.2mm.

4. Lightweight (<150g).

Desirables:

1. Single self-contained unit.

2. I/O-Link (almost a requirement).

3. Reasonably cheap (ik industrial automation equipment almost never is), something like 500-600 would be great.

I've found

I am looking at the fast-scanning inductive probes for my 2.4. Currently I have a chaotic labs CNC tap and have been having issues with its repeatability and it is now causing my SB2209 to throw errors (investigation tbd), not to mention it's hella slow.

Ideally the probe would have the following:

1. CAN-compatible
2. Nozzle touch-off capability

Hiwever, it appears thay only cartographer has the former and beacon has only the latter. I don't love the idea of needing to run a second cable for usb (I have umbillical setup), or using one of the combo CAN + USB cables.

Will cartographer have contact capabilities soon? Will beacon have CAN compatibility added? How have you integrated either Ca

I work with 6-axis industrial robots and, especially on the large ones, wonder how they are manufactured and calibrated to achieve pretty good accuracy over such a large work volume. Specifically the tolerance stackup of the bearing positions on each link. As the radius of each axis' arm can be quite long very small deviations can add up to considerable displacement at the TCP. My thoughts on the potential avenues are:

1. They just held to a very tight GD&T true position tolerance.
2. They measured with something like a CMM after machining and the very precise meaasurement is calibrated into the controller,.
3. They calibrated after assembly and the specifics input into the controller?

I c

Hello!

Not a machinist but an engineer who enjoys machining and manufacturing in general.

I've seen on various videos lights-out machining for production runs of parts, very cool and super productive. I have a few 3D printers that I can leave unattended without issue, but a 3D printer would be hard pressed to significantly damage itself if something went wrong, and even if it did it would be comparitively cheap to repair. CNC machines are a whole other beast with the ability to significantly damage itself in expensive ways if crashed.

For those setting up lights-out machining, how do you make sure the machine will be able to catch if a tool breaks (whether at the beginning of its use in a

Hello,

I was looking for a micrometer that is fairly cheap but good enough (for me) and stumbled across the Shahe brand. $32.99 for a 0-25mm micrometer with ±0.003mm accuracy on amazon, cheaper than many calipers. Has anyone had any experience with this brand?

If they meet the specs they laid out then that's good enough for what I need them for. But if they're in reality ±10-20um then I can save the money anr use my calipers anyway.

Hi,

I'm considering changing my SB to the Archetype Breakneck for better cooling and performance. The SB is good but I find the cooling can be limiting. I currently use CNC TAP and find it incredibly reliable and useful as I don't need to change any Z-offsets when changing nozzles.

Looking at the configurator, there only seem to be options for Klicky, Euclid, and Beacon. Is there an exisitng model for TAP mounting?

This is for a V2.4r2 if it matters.

Hello!

My (younger) brother is graduating with his Bachelors on Physics and I'd like to get him a great gift to commemorate this. I am an engineer and thought a space pen could be a neat gift.

Before I settle on a gift I wanted to query the field, is there a classic gift for Physics graduates? What did you recieve (or what would you have liked to recieve) for your grad?

Note: I don't think he specialized in any particular field/discipline.

Thanks in advance!

Hello,

I've been playing with my 2.4r2 with stealthburner (Rapido HF) and it's been good fun and looks awesome. I've noticed the cooling isn't as great as I want it to be for bridges and overhangs unless I slow it down, and in general I like to get the best performance out of my machines.

I've been looking around and there seems to be 3 main alternative options for toolheads.

1. XOL2
2. DragonBurner
3. StealthBurner w CPAP mod

However I haven't been able to find a comparison across these options that compare weight, air flow, and other performance metrics.

Which one is best from a pure performance standpoint?

Hello,

I'm looking for recommendations for material choice on insulating panels. Specifically the panel for the electronics mounting panel is exposed to the heat of the bed and the chamber on the other side. Alternatives such as insulating the underside of the bed heater etc work well, but this a theoretical discussion. The material would have the following desired properties:

1. Low thermal conductivity
2. Low warpage at standard thermal temperatures inside the enclosure (upto 60-80C?)
3. Ability to be directly threaded into with M3 (or similar) fasteners or take threaded inserts
4. Reasonable cost
5. Readily available
6. Bonus points for customability (texture, colour, etc)

Currently it