Varun Rajamane
@zuron7
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Factories and FOSS. Motion Controls @
India
Joined December 2009
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It took semiconductors, rare-earth magnets, gearboxes with crazy ratios and so many FEA optimization runs to maximize A and minimize v in this equation.
Power (W) = 1/2 x ρ x A x (v^3)
That's before we get into the wavy blade design. Makes those fans very silent.
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6 years in and I've yet to see someone wind a motor like this in India.
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Everyone doesn't need to build a scooter to be a part of the EV Industry.
This water pump is waiting to be electrified. There's quite a bit of engineering to be done in selecting voltages and motor technologies here.
12V systems with high amperage is a fun design challenge.
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Hong Kong used Mechanical Engineers for city wide CFD simulations to fix their air flow problems due to too many high rises.
Core engineering skills are quite transferable across sectors.
Research:
1/n
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Both software and hardware are just as hard.
We've just forgotten that software can be hard cos very few people speak about building software products like kernels for operating systems anymore.
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A significant number of engineers that I interview struggle with understanding the law of conservation of energy.
I've been told that electric bicycles should charge as we pedal, airplanes should have windmills, cars should have piezoelectric shock absorbers.
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TBH, these fans have existed since the 90's, but became commercially more viable with modern tech.
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India can become a manufacturing superpower the day there are >10 people under the age of 30 who can heat treat a metal shaft to deform instead of shear on their first attempt.
Metallurgy seems to be a bastion of a generation that doesn't want to pass it's knowledge along.
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@WF_Watcher
@cpronammametro
@ChristinMP_
@NammaBengaluroo
@DKShivakumar
Also, quite absurd that they make you climb up, then down, then up again to the same elevation to enter the station and then down again to reach the platform.
God bless the architects.
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sphinx ji has influenced an Indian parent.
10x influencer.
i bow down.
Orientation day at my university for parents of EEE. 2015.
Question
#1
: So this college can guarantee my kid will get a high paying software job, right?
VC rattles placement statistics.
Culture shock felt.
The Rise of the Dawn of the Return of the Guru-shishya parampara of 21st century Part 2
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900W/1500W of pure R load for under Rs 1500.
Test and validation need not be expensive when you start off.
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Ayudh Pooja, a worship of Tools. Every region of the world has their own version of this. Religious or not.
This year, we've added a few equations.Equations are tools for development teams just as much as physical instruments.
Happy Dasara!
ದಸರಾ ಹಬ್ಬದ ಶುಭಾಷೆಗಳು!
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A professor that I enjoy learning from a lot in the domain of Power Electronics and Electric Motor Design.
The assignments are very leet code style helping you learn faster. Most Indian universities don't have such a hands on learning style.
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Rs 1000 per hour parking slots but look at the sharp edges and welding on that board. They let the temps get too hot.
Bad current setting or inexperienced welder or both.
Prices in Bangalore have really gone bonkers.
1000 ₹ per hour for parking.
It is nuts!
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@keanzbeanzz
A fan that runs slower with a larger area will consume lesser energy.
Speed of the fan being cubic, while area is only a squared relationship of the radius means some efficiency gains can be made from increasing radius compared to the speed of the fan.
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@protosphinx
There are a few nascent competitions that happen in the physical skills space like this soldering one from 2023. Needs more people to support them. Right now, they're like the sidelines of a conference, and don't promote more people to enter into the field.
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@Extr0pia
@mryalamanchi
Low Speed and High efficiency in a motor is a difficult problem to solve.
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A high percentage of hardware startups seems to be a beneficiary of NIDHI EIR and NIDHI Prayas. Probably one of the most effective grants that I have personally seen.
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Every time an
@atherenergy
scooter whizzes by.
Brand recall built via audio
Slack's ping
Skype's calling tune
So powerful but never discussed - am I missing any other examples?
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First Pi I ever bought. Early 2013-ish. On Lamington Road, Mumbai.
Bangalore was a difficult city to buy electronic components vs Mumbai/Delhi. Probably due to the lack of a trader community/mindset.
It still continues to be imo and a reason for why we reinvent the wheel.
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Semco has got to be the only hardware org that I have heard of that is truly bottom up. The employees decide what they want to work on. The executives are democratically elected. One of the more interesting books that I read the past year.
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I've seen a lot of students stick to 3D Printing only because working with metals seems unapproachable/expensive.
Make sure you'll do your GD&T. Pick a standard, at least ISO 2768 to start with, for open dims.Learn to inspect parts. CMM's are great, but not the only way.
Multiple hires made at
@etherealmachine
who’ve been very active in
@BAJASAEINDIA
, solar and electric car projects during their college days.
If you are a student building for your college, we’ve in the past and we’ll continue to do your parts for free. Reach out
@etherealmachine
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This has got to be one of the best executing hardware startups that I have ever seen. To get from 0 to this in 3 years is phenomenal.
On a side note, liquid cooling for all parts of the powertrain sounds like it could be an interesting solution for the Indian market.
Our best kept secret on building the world's first affordable & scalable 15-minute rapid charging technology is finally out after 2 years!
Watch the magic unfold in the video below⚡️🔋
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The 20 year olds from Manipal,
@ThrustMIT
are writing their own rocket simulation software. And it's FOSS!
Software for Hardware may be a big area that India can contribute to considering the existing talent base.
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And it was 3D Printed by this really cool company called amace in Peenya.
Awesome what metal 3D Printing enables us to do.
Traditional Milling would have the jig, fixturing and tool requirements so complex that the engineer would have dropped having the state emblem on these.
Chandrayaan-3’s Pragyan Rover includes an indent of the national emblem of India and the logo of ISRO on its two rear wheels.
As the Pragyan Rover is deployed on the Moon’s South Pole, the wheels will leave an impression of these symbols in the lunar soil for billions of years.
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@protosphinx
This is an industrial area in Gujurat. Everytime I've visited they've had fantastic industrial areas.
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It's 2023. Female Engineers in India in most institutions are asked to leave campuses by 6 - 7PM.
The odds are stacked against hardware engineers who need labs to work. Software Engineering only needs access to a computer.
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Just found out about Solar Decathlon India. Seems like the Formula Student equivalent for Civil Engineers/Architects and others who are really into buildings. Pretty cool challenges.
Also seems way harder cos you cannot iterate and experiment with construction like with hw or sw
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I dream to see a world where engineering (non-software fields) is done on FOSS.
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Spotted the SmartBike system in Chennai. I had to try them!
Lots of low hanging hardware opportunities here from IoT locks, high efficiency dynamo driven lights, brake pads or even the tires and rims.
1/n
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The marketing teams at Motor Companies are awesome at coming up with new topologies that the engineers designing the motors didn't know they designed.
BLDC. PMSM. PMaSynRM.
Explaining the difference between the above 3 is a big pain. Time for a blog post. Very nuanced.
What do you call the synchronous motor without the permanent magnet?
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I spent a good amount of time self hosting ERPNext till came along and made me reevaluate the worth of my time. Hands down, the best tech company in India.
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Where are all the Indian Hardware Engineers hanging out? We need to be having more discussion about tech and building in the hardware space in the open.
Working with engineers and builders who are best and world class in their domain is such a high! Time with them is like vicariously living a personal dream of being a scientist and technologist 😄🙂
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@protosphinx
The Bangalore International Exhibition Center was set up the the Indian Machine Tool Manufacturers Association.
It's unfortunate that metal cutting isn't considered as part of the tech industry.
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Always get a laptop that has open vents even with the lid closed for long simulation runs.
I learned it the hard way after losing two cheap laptops to overheating.
I learned the hard way, when you want to leave your computer open so it can run physics simulations that take several hours to finish, and you have cats in the house, you have to leave it like this.
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Most factories in China, from images I've seen, seem to be multi-storied.
Not so much in India.
With significantly lesser land available, we should put this on a higher priority. Also, high quality goods lifts (2+ tons) going to up all floors should be a standard feature.
Why is it difficult to set up a factory in India? Construction regulations are a big factor. Today's long story in Mint goes into the details. Make in India is all very well, but first entrepreneurs must be able to build factories.
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@rohitjadhav321
We seemed to have skipped the entire productivity increase in labour and going straight for machines.
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@Giridhar_Raju
For one of our recent openings on LinkedIn for Gremot (Mechanical Engineering - Entry Level Role), we had a different experience. Around 30% of the applicants were overqualified. Electronics was the same as what you saw.
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@tarunsmehta
You'd be surprised at the number of people asking me why we don't we have a generator attached in line with the EV motors we sell. We can generate energy at the same time they say.
I'm now considering wearing a t-shirt with the law of conservation of energy on it at all times.
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every time you visit SP Road or your local market in any Indian city you'll need to be asking for high quality and easy to shop stores like these.
we may just skip having these physical markets and most orgs just move online for purchasing even low volumes. low discoverability.
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Operations and Maintenance in India is a big coin toss.
Water Heater needed to be fixed. Technician disassembled, took out the insulating material, fixed the problem, did not put insulation back in.
The BEE for sure did not consider this in their 5 star efficiency calculation
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Hey
@formulabharat
, we need more coverage on X/LinkedIn. Instagram is great, but doesn't encourage enough technical discussions.
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I'll be there as well. I'm cool to walk a few people through the expo if it's your absolute first time visiting and find it overwhelming. Have visited the past few editions of
@IMTEX
, though I'm biased more towards metal cutting than forming (learn the diff if you're not sure).
People ask me about how to learn more about what's happening in manufacturing. This is how you do that👇
3 Expos happening in Bangalore in Jan.
1: Moldex: For Moulding Tech
2: Fastnex: Fasteners, and Fixing tech
3: Imtex: Machine Tooling and Metal forming tech
Trust me all
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Why does nobody want to work in Manufacturing?
There's no dopamine. Customer orders trickle in slowly. Launches are done once a year. Shipping velocity is low.
Making realisations staring at this wall that's been built by the team over the past 4 years.
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Always wanted to work with mechanical design with the flexibility of software. This project gets the closest.
PLM systems just don't have that flexibility or agility. Just the ability to fork a design for modularity would add so much value.
It's really nice seeing things come together.
For example:
Making a change with UI.
It creates a meaningful diff for a PR.
GH actions run to reproduce CAD artifacts, like the updated geometry file and a snapshot.
Example PR here
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@kukreja_abhinav
@protosphinx
Protectron has started manufacturing USB C connectors in bangalore.
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Between EV Charging and USB Type C's horrible naming, the need for the general populace's ability to read device ratings for voltage, current, power and energy will be critical to accelerate electrification.
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@LifeIsAtomic
Availability of materials and treatment processes to achieve desired strengths is good in India. Design the parts for a good enough factor of safety and you should be fine.
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A note to all college students: Getting your feet wet by joining your college's Aerospace or Formula Student Clubs is one of the best ways to get a head start in the core industry after you graduate.
1. The salaries and work scope in good core companies are significantly improving
2. These folks speak to 100s of alums. A few would only advise them of core
3. It is always good to study core subjects when you are in college, irrespective of you join the sector or not
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These folk are making MRI machines in Namma Peenya. My favorite part. They've been at it for 15 years!
Never giving up is the only thing that matters.
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Hey folks, we have a position open for a sourcing engineer
@gremot_mobility
. If you love talking, working and visiting shop floors, come apply.
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@protosphinx
Adding a few to this list that I used to frequent that aren't mentioned in this list. Find your vibe.
r/ECE/
r/ElectricalEngineering/
r/embedded/
r/MakerLabStations/
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Spent 3 days with a friend who hates large cities and the insight I came out with is that I have spent 216 days (5200hours) commuting in Bangalore in the past 10 years of my life.
I do hope the productivity gains of a city make up for these losses.
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Every morning on the way to work in Bengaluru.
On some days, this truck is worth more than the seed round of most startups.
A sign for you to join the hardware industry. It's 🚀
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These trains are going to be the backbone of the manufacturing industry in Bangalore. Will help millions of people get to work more easily.
Just-in:
Bengaluru suburban rail's Phase 2 to cover 452 km; Karnataka seeks nod from rail ministry
@KridePrm
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Embedded Costs seem low enough to not matter anymore, but mechanical prototyping still seems awfully expensive once you start working with processes like WireEDM
Write detailed RFQ's/Product Requirement before you start. Or ensure the cost of iterating in your field is very low
By being good at manufacturing you can save cost. Reduce material costs, optimize production, reduce overheads, etc.
But much of the lifetime cost of a product is locked in at concept phase.
Here's a diagram of committed and expended costs during the life-cycle of a product.
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We only seem to find minerals when we're looking for them? Do we not search for all material deposits when conducting geological surveys?
The U.S. Department of Energy confirmed its discovery of a 3,400-kiloton reserve of lithium in California's Salton Sea, making it one of the largest exploitable lithium deposits in the world.
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Electrification is going to steamroll the ICE industry.
The construction industry seems to be one of the hardest for a startup to enter into looking at the companies @ EXCON '23
Solutions for small construction equipment seems to still be a highly localized market.
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Mumbai in x years? We only seem to use FSI/Airports and Transport Availability to determine building heights.
n/n
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Companies manufacturing hardware should standardize their measuring equipment. I've seen a single company with three different multi-meters from different companies across their production, application engineering and development teams.
1/n
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Spent some time with
@getairchat
and it's the first social media after perhaps phpbb forums that forces you to go deep into a topic. I see myself using this.
Design affects how you share information.
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@x_rahulraj
The Japanese buying from the Japanese is the reason we have so many Japanese companies in India.
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This is awesome. The number of CAN Datalogger projects I've seen in the past year is absolutely through the roof. Seems like the ideal candidate for a FOSS Solution which is low cost and democratizes access.
Last year, I developed this
#CAN
#datalogger
with Wi-Fi for an Electric Bus Company.
Besides chip shortage, the major challenge was validating the design with 3 CAN Analyzers and later with real end devices/sensors. It took 6 months to complete the validation.
#STM32
#ESP32
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Just landed in Ahmdebad. Auto rickshaw driver asked for cash. The
@peakbengaluru
in me was shook for a whole minute there.
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Manufacturing primarily does cost plus pricing vs other industries that do value/status based pricing.
This is why the industry gets enraged/thinks twice when they need to buy something based on perceived value.
I'm looking at you engineering simulation software 👀
Approx a dollar stitching in my factory in India for the set. Also, just cos a label will sell them for 100 usd, stitching workers won’t automatically earn more. They are paid on the stitching done.
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For those of you coming from far off, you may enjoy the new Science Gallery (
@SciGalleryBlr
) that has been opened for the public last month.
It's very close to IISc. Link in the thread.
If you are in Bangalore, and you want your kids to have exposure of good science, go to IISC today.
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@Gundermgg
My hypothesis is that engineering tools for hardware engineers are absolute crap because the engineers who use it don't write as much code.
Software Engineers on the other hand build their own tooling.
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Looking to bring awareness about the EV Industry and the manufacturing industry at large to the younger folks here!
Speakers for the Tech Talk
@saurabhchandra
,
@zuron7
,
@gupta0508
, Dr. Uttam Sen (cc:
@DV_Apoorv
)
Link:
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Folks who are at IMTEX Forming, if you're a student, there's a free form hiring event by machine tool manufacturers tomorrow at Hall 4 at the Academia Section. If you wish to work with the machine tool sector, come.
You'll be able to ask your questions directly to company reps.
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It's always been a challenge in India to convince hardware engineers to automate their design with the help of software. Most engineers seem to have picked MechE with the purpose of not having to write as much code.
Tools like this can help accelerate software based engineering
The way we do engineering today is a waste of time.
Flow, an ex-rocket company turned software, wants to change that on episode 7 of S³.
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A subtle trend of using "cooler" words in the manufacturing industry.
Haven't heard the word godown or shed in a long time now. Everyone says Industrial Warehouse/Shop Floor/Factory/Unit.
Anecdotal evidence mostly from Bengaluru.
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The 18 year olds will always be ahead with new tech because they have so much free time to learn.
how does one replicate that free time to learn as you get older?
I have no idea yet.
there are 18 year olds on r/localllama that are two years ahead of the field in understanding finetuning/deploying/scaling llms
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The Geedee car musuem in Coimbatore is a great visit if any of you'll ever find yourself there.
A few images about the history of GD Naidu from the gallery.
Tech X doesn't like talking politics, but I'm thankful that there is a lot of support coming in from the government.
Gopalswamy Doraiswamy Naidu.
India's Edison
Developed India's first indigenous motor
In 1937. The Machine behind iconic Lakshmi Machine Works
He could manufacture 5-valve radio for ₹70. Lowest cost in the world
In 1941. Imagine
We lost that art. We lost our heros
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Chinese Social Media apps support more Indian languages than our government or even Indian companies do. It's no wonder their apps are able to spread way faster.
One thing to be apathetic; quite another to deliberately marginalize 4.3 cr Kannadigas by removing a language! Here's the message:
@TheOfficialSBI
doesn't give a damn about us! SBI better return moneys, stay inside UP where deposits swell from overabundance of per capita income
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Probably the only startup at EXCON '23. Congrats Bullwork on the amazing work you'll are doing!
And it's a Wrap....
Thanks to the entire Bullwork Mobility team who have worked day and night to make Excon a roaring success. We had a wonderful show. Thanks to all the people who had participated and visited our stall.
#thanks
#excon2023
#team
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@x_rahulraj
@blawger
@saurabhchandra
@akashthematrix
@dvgadre
@chotasanjiv
@MuddaKaushik
@protosphinx
Farm Equipment. POC's can be built as simple handheld tilling machine going all the way up to a combine harvester.
India is already the world's largest manufacturer of tractors by Volumes. With Climate Change and shorter sowing/harvesting cycles, good industry to be in.
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While there is some truth to the lower production in factories, KPCL also is acknowledging the role of renewables.
@TeslaClubIN
@arunbhats
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A physical business trying to speedrun and building in public!
All I've seen of folks building in public till now have been indiehacker software and embedded hardware (pi + arduino combo typically). Never a production plant.
15 Yrs ago
@abhijitgupta
and I bought and sold Beyoncé tickets to make extra bucks while at University
Today he’s Co founder of a bootstrapped 100 Cr F&B biz (Pizza Bakery & Paris Panini)
Watch him experiment building a 100 Cr Burger Biz in 100 Days
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The VC's are coming for Manufacturing SaaS!
I'm conflicted here. Most software that we've used at work seem to have a rent seeking habit after the first year. We try and use FOSS wherever possible for that reason.
Automotive Margins can be very thin, even at scale.
1/ We're seeing unprecedented applications (already 6k+) for our fourth Antler Residency in February. Themes on what's getting new founders excited:
- Manufacturing SaaS is finally becoming a "sexy" space
- Resurgence in Web3 (this time, focus on infra) and Gaming (studio model)
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Electric Boats are here! Would love to see these everywhere on Indian Rivers, Backwaters and Coasts.
Navalt proudly unveils Indra, India's largest solar-electric ferry. The grand inauguration at IWAI Terminal Punnamada, Alappuzha, was honored by the esteemed presence of dignitaries, including Shri. Roshi Augustine, Minister of Irrigation, Kerala.
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Free FEA Software built with taxes is good. Anyone know if this is in active development to compete with commercial software?
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@pampereira9
The argument is that in Mumbai you have the option of taking alternate means of transport, in Bangalore, the road is the only option.
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@aphysicist
I do know of a few industries where CNC's are tossed out every couple of years cos they're not as accurate any more.
And tossed out as in put into use for machining non-critical parts.
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The best part, on the business site, the captcha validates itself before clicking on login.
Logging into SBI account is the most stressful experience ever. Is there something that tops this in any bank across the world?
- Enter username, pwd, captcha
- Enter otp
- Forced change pwd
- Add new pwd to pwd manager
- Enter pwd change otp
- Enter username, pwd, captcha
-
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Going to be at IndiaFOSS this year to meet people who are trying to use FOSS in the hardware industry. I think the usage of FOSS is critical to the improvement of margins in manufacturing. There's 6 talk proposals out of 100's (). Very Nascent still.
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An acquaintance I had met 3 years ago trying to build an e-2W used his knowledge to pivot into making IoT-enabled Motorized Gates/Garage Doors at a low cost.
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@janausp
wrote the TenderSURE guidelines in 2011 for building well made roads + pavements and central bangalore saw quite a few roads built with the design. Still in very good condition today.
But we never expanded it to outside central Bangalore. 10 yrs
Spent the weekend with
@haryannvi
covering cities in s. e. asia. What works, what doesn’t work, how do they manage infra and what can we learn from them.
Reminder that while China learned from its neighbours incl 4 Tigers of Asia, India has no such luxury.
Our neighbourhood
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@bengalurutrains
@saurabhchandra
Will the suburban train be extended to towns around Bangalore like Tumkur, Hosur, Kolar,Dobbaspete.
It seems like the current routes pretty much fun parallel to the metro.
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Tried using a few image generation models to create a work instruction. Suffice to say most of the models do not know how the internals of any engineering product look like.
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The third is a pedal bike with pneumatic tires. (blue and grey) This is the one I ended up riding on a 20km ride through the city.
The ones which did unlock all had good air pressure. Which was surprising considering the recent floods and maintenance of the other bikes.
4/n
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@MillionPageProj
Digilocker allows private folks to generate certificates as well right? Penetration of HR Software is still quite low to mandate this I guess.
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Parts are being made in India already.
When will we make those beautiful engines indigenously on our own?
Biggest order for same is from us, can’t they even set up infra to make 25% of these engines in 🇮🇳 ?
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This is a good talk on why you can and should adopt FOSS when manufacturing hardware. Especially in India. It will democratize design to more engineers in my personal opinion.
Tried promoting use of KiCAD at Indiafoss 3.0 conference.
Let me know your thoughts on this!
#kiCad
#IndiaFOSS
@shreekumar3d
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