Home Machine Shop Project: Syringe Engine Part 4

A series of short videos showing the up-cycling of various items of scrap metal and plastic into a useable pressure generation device.
Contains sawing, milling, turning, drilling and tapping in the home machine shop.
For demonstration / teaching purposes, as part of my day job as a medical equipment technician, I need to be able to produce an oscillating (air) pressure (of say +/- 20mmHg) overlaid on a static pressure (of maybe 250mmHg).
The absolute pressures aren’t critical; however device creating them would need to run for up to an hour at a time, reliably producing the pulsatile pressure waveform whilst maintaining the underlying static pressure without any net gain or loss.
The oscillating pressure component is required to fool the medical equipment into running a simulated treatment.
The underlying static pressure needs to be adjustable at will to create under / over pressure alarm conditions that may be encountered (e.g. through blockage or leakage) during a typical therapy session whilst a patient is connected, but in the classroom environment where no patient is present.
There are many possible approaches to the design, but with no budget, time, materials, tools or any other resources allocated to the task, I elected to complete the device in my spare time in my home workshop using odds and ends I’d collected from the scrap bin.
Created with subtitles (click the CC box) for the hard of hearing, or when you need to keep the volume low.

Part 1: • Home Machine Shop Proj...
Part 2: • Home Machine Shop Proj...
Part 3: • Home Machine Shop Proj...
Part 4: • Home Machine Shop Proj...
Shot: DMC-TZ30 1280x720 25P MP4
Edit: FCP7 ProRes 422 HQ
Mic: C01U

[@frankierzucekjr]

You definitely know your stuff, very cool project. I hope to one day be able to machine my own parts, or anything I may need. I could make myself

[@seansysig]

Concept design and execution were spot on. Great use of junk drawer parts. Lathe & mill work very nice. Your background aids in this type of project.

[@dfailsthemost]

That magnitude control was an elegant choice. Fine control without overcomplicated construction

[@malcytull]

A brilliant project, I was fascinated by your skill on your machines, thank you for posting.

[@ocotillodavid7343]

I’m not a machinist, but a restorer of antique furniture. Though not equipped for this type of project, I was transfixed by the process and perfection shown. You have a new subscriber.

[@patkirk960]

Well done bud. Quick tips from an old machinist try double sided tape for your plastic hold down. We had nice stuff by tesa but strong carpet tape may be ok. You don’t want a lot of sticky mess left mind! Also consider getting a ‘collet holder’ for turning both small diameters and also to prevent ‘overhang’ (and consequent vibration) that’s the distance from your jaws or collet to the point or machining. ER collet holders is what I mean not some expensive set-up. Try Amazon for say ER 11 collet holder that’s the small ones.

[@1924ab]

I never thought I would say this but I'm in awe of your junk drawer,great videos!

[@edgeeffect]

Silly sound effects during assembly work really well too.... I don't know if you're old enough to remember "Vision On" or "Take Heart" but it kinda reminds me of that.

[@oldcomps]

Great work and series of videos really enjoyable easy watching

[@untrainedprofessionals2374]

What Kevin said. Keep em coming very enjoyable.

[@michaelsimpson9779]

Nice work

[@Brian18741]

What an incredible build 👌👍

[@grahamodonahoe7104]

just foundthi channel . interesting project and outstanding execution!

[@mickyc4003]

Really enjoyed your 4 part series! Nice work!!!

[@mrporridge2304]

really good stuff well done! Some excellent machining and results given your apparent setup and an extremely satisfying motion at the end. Keep up the good work! 👏👍

[@ozcanonal]

Excellent work..! Congrats.

[@bricology]

Damned impressive work! (And I loved the sound-effects!)

[@2lefThumbs]

Excellent - great idea for the circular form cutter, enlightening to see the versatility of superglue abours

[@JBFromOZ]

top project and awesome first video series! well played sir!

[@tiphcuoc]

Magnificent. More, please.

[@MilanDupal]

Excellent performance, keep your videos comming!

[@WatchmakerErik]

Very cool project even if it's not particularly recreational 😃 I don't see enough people machining from scraps. Nicely done.

[@hg2.]

Great stuff!

[@Kevin-gx8lc]

Excellent! very well done Sir! More please! Greetings from Southport. :-)

[@fpreston9527]

More, more . Fantastic

[@bcool6801]

Thanks for sharing brother

[@spikeypineapple552]

Smashed it mate

[@richards6452]

Very neat and "neat".

[@gertskjlstrup1804]

Very nice!

[@junchang132]

Entertaining and learning

[@parjacpar3077]

Great project you should do some more

[@MrCharlesCurrent]

Impressive.

[@squareyes1981]

MOARRRRR content!!! (please)

[@TylerHicksWright]

Instead of using super glue directly on the acetal, use a good masking (painter's) tape on the acetal and on the base. Then use superglue between the two. Holds well, but is much easier to get off when you're done. For the masking tape, look for one that suitable to use on bricks or concrete blocks, as they tend to have more adhesion than the cheap white stuff.

[@soothcoder]

What he said! Also check out NYC CNC as they discuss this technique in more detail.

[@garyhardman8369]

Agreed. I learned about this trick on a luthiers channel - Crimson Custom Guitars. However, I tend to use double sided tape, which I steal from my crafter wife. Look for the tape with a red backing - it is superb stuff. I think the wife buys it from 'Create and Craft'. I think this is the same stuff from Amazon UK: www.amazon.co.uk/dp/B07BV1LNV6?aaxitk=sbVj9myClwQKumupFX3UrA&pd_rd_i=B07BV1LNV6&pf_rd_p=b6d36b18-d68e-4083-ae5d-154f0b82c184&hsa_cr_id=1097444300202&sb-ci-n=productDescription&sb-ci-v=Super%20Sticky%2C%20Red%20Liner%20Double%20Sided%20Clear%20Tape%2C%20Pack%20of%203%20sizes%20-%203mm%2C%206mm%20%26%2012mm%20(5mtrs%20per%20roll)%20Mobile%20Phone%20Repair%2C%20Office%2C%20DIY%20Crafts%2C%20Scrapbooks%2C%20Document%20Repair&sb-ci-a=B07BV1LNV6

[@wolfgangbeginners-mind2853]

Try brazing ball bearings of the right DIA to a tool base and grinding them down to the equator.

[@peirob]

Excellent successful project. Very nicely edited set of videos. Congrats and greetings from Geneva Switzerland

[@bikefarmtaiwan1800]

Nice content- very much styled on the Clickspring style esp the music but that's fine- original content and good workmanship interesting methods so thanks for that, good luck and keep it up . Not sure how you get to call this an engine though :)

[@davewilliams6172]

This engine provides the pneumatic pressure to drive a piece of medical training equipment ..see 0:24 of episode 1 of this build.

[@vitjan11]

Total time needed?.. just curious.

[@philiply7848]

I really enjoy watching your videos. What brand is your mini lathe? I also was wondering if you would send me a few pics of how you have your shop setup and some of the lathe. I have a similar situation. My home shop is a single car garage, I currently have an ENCO mill drill. I also load my own match grade ammunition. I'm in the market for a mini lathe, hence the reason I'm asking about yours. You can send me an email if you'd like. I'd really appreciate it. I'd gladly share some pictures of my shop. ( I'll show you mine if you show me yours. Haha. )

[@ReevansElectro]

Move over "This Old Tony". You have competition!!! If RM starts telling jokes, you will have trouble keeping up. (Click Spring is left in your dust RM)

[@Bob_Dub]

@ Robert Evans :o Blasphemy!!1!!eleventyone!1! ToT for Prez!