Dan Gelbart

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@JMXxxxx 9 сағат бұрын

Would love living next door... wow, amazing work!

@papukaiffa 19 сағат бұрын

I'm pretty mind blown of all these machines, but as electronics engineer my jaw dropped when you pulled vector network analyzer. You're truly expert of all.

@dgelbart 12 сағат бұрын

I used to be a respectable electronics engineer (telecom, signal processing) before I got into all this high-precision obsession.

@pytebyte 3 күн бұрын

The oven is still on 😳 :) Impressive work space. Build my first CNC two years ago made out of wood. Had to move it into a basement which has a lot of moisture in the air. Having a proper space like this is definitely a goal to achieve.

@kylelaw7210 4 күн бұрын

You should really consider letting someone come in your shop and take detailed pictures and measurements of some of the things you have made so that people can more easily build their own. Also thanks for sharing. Your videos have become legendary.

@isaiahjanzen3822 13 күн бұрын

How does the carriage move? How difficult would it be to take these fundamentals and use them to make a mill?

@Karma-fp7ho 19 күн бұрын

Absolutely wonderful.

@tc8714 24 күн бұрын

scoutcrafter said this video was great

@reverendtfg6802 23 күн бұрын

*It's not.*

@gutsngorrrr 28 күн бұрын

HI Dan, It's been such a long time since you posted an videos on KZbin and i really enjoyed the work you did and even the workshop machinery walk throughs, it would be great to see what you've been up to in the last 2 years. Fingers crossed we get another video one day.

@user-my2me3db1n Ай бұрын

The depth of your insights and the power of your delivery held me spellbound. I could have remained your eager audience indefinitely.

@Hawki007 Ай бұрын

Can you tell me more about the cross sled and how that was made? Also, the T blocks of the bed; are the parallels just epoxied on? No bolts?

@dgelbart Ай бұрын

The cross slide rides on two granite parallels, using air bearing similar to the main saddle. The tops of the T-bars are just glued on.

@S0K0N0MI Ай бұрын

That workshop is every engineers wet dream. Self engineering your tools is impressive.

@137bob3d Ай бұрын

7 21 24 that demo of the cylinder / piston and on-off air valve was an ingenious idea to aid understanding. it was just this month reading t. clancy's novel " the sum of all fears " that i became aware of machine tools using air bearings. and their ability to grind metal on the inside or outside surface to a mirror smooth finish. and that led to searching u-tube for a video on the a-b subject. a curiousity is how much of a layer of metal , millimeters or microns , an a-b lathe can remove at a time. my thought is too much will cause the rotating shaft to tilt off-center. and possibly lead to vibration. also curious if hi - precision microgram scales rest on some sort of an air cushion . to damp out ground vibrations. and that it is this air - damping engineering that makes them so costly

@nickporter9706 Ай бұрын

Hello! Awesome shop! Is there a chance you might explain in detail the the weiler's chuck. I've been trying to figure it out and feel I can guess at some parts like how the stack of plates interface. The part that has me stumped is the drive mechanism for the adjustment. I can't imagine a way based on the location and angel of the adjustment from the video, at least not without gearing or similar to turn it 90° but the sensitivity of itbmakes me struggle to believe that's the case. Possible a wedge system?

@nickporter9706 Ай бұрын

If you'd prefer not to say publicly I understand🤫 Maybe I could reach out another way

@dgelbart Ай бұрын

The 4 jaw self-centering chuck is mounted to a lapped steel plate held between two other fixed steel plates. One of those steel plates is fixed to the spindle. The plate holding the chuck can be moved in two directions, X and Y. In each direction it is clamped between two opposing eccenters with a travel of about 1mm. Each eccenter is rotated by a worm gear. Each opposing pair of worm gears is coupled by a flexible shaft which is twisted to provide a high preload between the eccenters. The preload in each axis is about 1 to 2 tons. When you turn the X axis worm, it also turns the opposing worm by the same angle, but the preload is maintained by the twisted flexible shaft. In order to prevent cross-coupling between X and Y (X setting should not move when you change Y) the center plate is guided by linear roller bearing (ground into the plate) to be able to move in X and Y but not to rotate. All the parts of the chuck are made from A2 tool steel hardened to Rc60, ground and lapped. The huge preload is needed in order not to lose stiffness compared to a chuck mounted to the spindle. I even build such a chuck with motors inside that takes out the runout at a push of a button, but that one was even more complicated. To build such a chuck you need pretty good equipment and skills.

@nickporter9706 Ай бұрын

@@dgelbart wow!😅😅 I feel better about having not figured it out on my own, there is alot going into it for sure. And in such a relatively small space. Fantastic! Would love to see the motorised version in action one day. I don't think I could make an approximation now, but what a goal to work towards

@nickporter9706 Ай бұрын

@@dgelbart thankyou for sharing

@alelasantillan 2 ай бұрын

Your work is amazing!

@Transmission4less 3 ай бұрын

Very impressive. Optics to thermal imaging to Kodak to UBC. Great stories i read about you. Got me confused, spending time if you can afford around basic instruments and machines. if you can express your thoughts in advanced math with videos in KZbin so we can enjoy more from you

@marklagana2769 3 ай бұрын

are you saying you cast an LP using a silicone mold and it worked? I'm not saying it's impossible but i feel you would need such low viscocity silicone to flow into the grooves that the silicone would not be able to withstand the heat of thermoplastics. Thermoset resins maybe but the low viscocity silicone is so weak it wouldn't be very repeatable and something like polyurethane resin would probably shrink to much to be reliable. (i love your videos by the way you're my hero) i was lucky enough to work with some vintage vinyl presses, the EMI 1400 incase anyone is interested, EMI headquarters would use a special lathe to cut the grooves into either aluminum covered in acetate laquer, or copper. I believe the lathe cuts with sapphire. From this, industrial magic, not really sure but after some process negatives were created in Nickel using electroplating. These thin Nickel negatives were sent to us, protected in peelable plastic then a spray with compressed air (dust) and put onto the top and bottom stampers which were giant harderned steel flat surfaces (record shaped). The nickel would get bolted in the center and tightened around the circumference with a large threaded ring. PVC pellets would get vacuum sucked into a auger and extruded into a handful-sized plastic puck. The machine then pushed the oven dried paper labels into the top and bottom of the puck whilst also picking it up and placing it in the center between the two stampers. The stampers had low pressure steam running through internal pipes very hot, they would close together (i think also using steam power), and pause to allow the PVC to re-melt at this hotter temp, i think then the stampers closed together slowly to the final position and paused to allow the pvc to flow into the grooves. The steam in the stampers was replaced with cold water, they would open and the solidified record would be stuck to the bottom stamper, where a hot knife would slide in to the edge and the stamper would rotate, cutting the trim. It would pop up and a linear axis would transport it to a rotational axis that gave it a guided drop into the inner sleeve then another guided fall onto the stack. All the axes were pneumatics with compressed air, the 'end stop' was to smash into the end of the axis and remain smashed And before anyone corrects me, I know the nickel negatives were actually called stampers and the giant heavy flat surfaces they bolted to were called moulds but i hate that terminology

@dgelbart 3 ай бұрын

The reason you can reproduce nanometer size details in silicone rubber of fairly high viscosity is the wetting and capillary action. Silicones in general have very low surface tension, so they "pull themselves" into the grooves. When you press records you don't have this mechanism to help you, as the polymer does not wet the nickel, and you have to force it in. Just think how this mechanism lifts water to the top of the tallest trees. Without surface energy release (wetting in a capillary) you would need an enormous pressure to pump the water to the top of the tree. Unfortunately, the subject of surface energy, critical to so many processes, is not taught in engineering school. You are not the only one who was surprised by this process.

@marklagana2769 3 ай бұрын

@@dgelbart thanks for the reply, fascinating.

@maigurens 3 ай бұрын

I want one

@pipimontana 3 ай бұрын

+++ never operate a drill press with gloves (close to the drill) +++

@ltsky311 3 ай бұрын

@dgelbart Is that the bed of your air bearing lathe in the background, it looks like the granite T blocks you made for yours with those white bolts (would love to know what those are or where to find them. Id like to try my hand at making one myself. It would be awesome if you would do a more thorough breakdown and overview of your beautiful lathe.

@peterwiles1299 3 ай бұрын

Excellent presentation. Working at micron precision is probably the envy of tool makers. However, this is far from the finest precision in commercial use. The likes of ASML - Zeiss make components at the nanometer or better levels of precision on a routine basis.

@dgelbart 3 ай бұрын

You are correct, parts are routinely made to the nanometer level, even without lapping. I fabricated nanometer-level optical parts myself. This video was about machine tools, and the machines shown are as accurate as you'll ever need in a machine shop. When you get into optical parts the machines and techniques are very different.

@Transmission4less 3 ай бұрын

Will you share the mechanism used to achieve this accuracy in X direction , the encoders implemented, and the servo/stepper drivers ?

@dgelbart 3 ай бұрын

The accuracy is based on a high grade (grade C0) ball screw with a preloaded nut. It is driven from a microstepped stepper motor which is geared down via a timing belt. The amount of gearing is selected by the pitch of the lead screw. To get 1um error on a 5mm pitch the angular error has to be 360 degree/5000=0.072 deg. A 200 steps/revolution stepper motor is accurate to 5% of a step, or 5% of 1.8 deg=0.09 deg (at no load) so a 2:1 reduction is sufficient. Note that a rotary encoder does not increase the accuracy. The leadscrew can be error-mapper as the basic accuracy of the lead screw is not quite 1um, or a linear encoder can be used. A high torque motor is selected to limit the angular errors caused by torque variations (what is known as "power angle"). For better performance you can use a servo-motor with a built-in encoder such as teknic.com/products/clearpath-brushless-dc-servo-motors/. The couplings between the ballscre nut and the slide are critical as they should not transmit any side or tilt forces. Best type of coupling is as used here: www.universal-thread.com/downloads/Universal-Lead-Screw-Assemblies-Catalog.pdf.

@Transmission4less 3 ай бұрын

@@dgelbart Thank you so much for answering the parts that were taking my thoughts on how to achieve this accuracy without needing a high-precision glass absolute encoder. The info you provide about the high accuracy of the lead screw is very helpful over the ball screws.

@Transmission4less 3 ай бұрын

kzbin.info/www/bejne/b4WulWOFjbGcn6s

@lubos4639 4 ай бұрын

I wish I could have worked for one of your companies Dan. Fantastic to have you as a master at least like this at a distance. Nothing can replace experience in the learning process, and I can only thank you for sharing this experience with all of us !

@adrianram5524 4 ай бұрын

I so love listening to this guy

@cjdougherty2728 4 ай бұрын

Out of curiosity,what is the square foot of your shop?

@dgelbart 4 ай бұрын

1600 sq. ft.

@Lhyliphian 4 ай бұрын

We would love to use this footage for our feature film! Do you have an email address we could refer to for a collaboration?

@dgelbart 4 ай бұрын

Sure. Please contact me via the following email: [email protected].

@Lhyliphian 4 ай бұрын

@@dgelbart Many thanks!

@niksto 4 ай бұрын

Actually tape worms works well for loosing weight. A lot of side effects might put You of slightly.

@niksto 4 ай бұрын

The scientific community is not always nice. Ask Lize Meitner.

@dgelbart 4 ай бұрын

Also ask Ted Maiman, who built the first working laser but was denied the Nobel prize because of the jealousy of the scientists who failed to build one.

@niksto 4 ай бұрын

@@dgelbart Also Nobes testamente stated that the invention that had benefited the humanity most should have the prize. Later it have developed to be a prize for basic research. Not bad but its also nice to actually construct a gadget.

@thomapapa4006 4 ай бұрын

Hello, I just came across this channel and am amazed with your precision workshop and your knowledge. You remind me of Q from Q Branch in James Bond 007 Amazing!!! I will definately be checking out all your other videos. Best Regards Sir