Deep Grooves Mastering - Project Bladerunner

[opcode66]

Rough estimate is dc resistanc eis 2/3 ac impedance fyi

[studiorp]

What mean your last phrase ?

Now that I know all dates on my coil, in which mode I can calculate the freq. response ?

[opcode66]

A 4 ohm ac impedance coil will likely have a 2.7 ohm dc resistance.

This is at 1k

[studiorp]

Which formula do you use ?

[tragwag]

looking forward to this, as I have the non-feedback VR head, the bladerunner with feedback will get me into a higher realm of quality.
excellent!

[opcode66]

Bladerunner 1.B Part 1

Test cut using my Neumann SX74 cutterhead with detailed analysis and explanation. In this first video I am simply establishing a visual baseline from which to make comparisons with test cut from Bladerunner 1.B. Next video to follow soon. I'll be performing the exact same cuts with Bladerunner 1.B. You'll be able to compare groove for groove what each is producing. I think the results will be really clear, straightforward and will leave absolutely nothing to the imagination. Absolute definitive proof of the performance of my cutterhead. As you all know, I'm all about disclosure. All will be revealed. You will be the judge.

[dimi751]

Thanks Todd can't wait !

[opcode66]

I've resolved my issues with some parts resonating and causing audible distortions. This was the final bench test before filming of Part 2 on the VMS70. Are you ready to see Part 2 yet???? Get excited...

[dimi751]

Hi opcode

I'm exited about this any updates ?

Dimi

[opcode66]

As a result of some tests, I am refining my torque tube configuration. I've learned a bit about the physics involved and where a lot of my resonating distortions were coming from. The latest bench tests are fantastic. Particularly the fact that I can now put pressure on the torque tube and I dont hear a difference in sound quality. Before, if I touched the torque tube with my finger while running audio through the head, I would notice a drop in high frequencies. That is no longer the case! It sounds identical reqardless of some application of pressure to the tube or not. That is huge! In the above video, i put the phone on the back of the cutterhead first, then at the end I rest the phone on torque tube. It sounds nice and clear on the tube as it should.

Other than working on the torque tube and tube mount, I was quite busy finishing up the groove graphics application. It now has many more features.

Please continue to check back. I appreciate the interest. It will be worth the wait....

[dimi751]

Hi Todd


Thanks for the update over 6k views on this topic looking forward to this

[opcode66]

So, got this going for me. Which is not bad... I've achieved proper vertical motion given out of phase signal. I've now unlocked all of the physical secrets of a 45/45 Stereo Cutterhead configuration. I understand every nuance of every part of the entire system. I am now tweaking the tension of the transducer springs to achieve the most highs possible out of plastic. Then, I translate to metal the critical parts. Additionally, I've learned how to make bending jigs for aluminum tubing and am on my way to fabricating nice vacuum tubes. Feedback follows. Stay tuned!

Bladerunner 1.B.4 Test Cut

1K In Phase at .5 Amps

IMG_6338.JPG

1K Out of Phase at .5 Amps
Beautiful Lusciousness that is Vertical Motion

IMG_6340.JPG

[opcode66]

Bladerunner 1.B.6 Test Cut

Sounding so much better. The 45/45 system is functioning properly now. All of the hallmarks of a proper stereo cutterhead are evident in my grooves. I have: vertical motion, channel separation, proper excursion, good volume, and high frequencies. Also, nearly every part is not printed with 98% fill. That means the head is almost entirely solid.

I just need to get the ultra highs to represent now. But, that will be easiest in metal parts instead of plastic.

This represents a distinct leap forward. More to come. Stay tuned. Feedback follows. If I haven't impressed you yet, this should do the trick...

[dimi751]

Hi op code

Great work ! Wow what a huge changes from the last demo. I love the song choice I also did feel like dancing while watch this video ha !

Blade runner in progress for such long time, I think will be huge outcome once finished your project.

Very excite about blade runner future.

[inspector77]

Amazing! good work Todd, lets wait for the metal parts for listen the improvement.

[opcode66]

After making a final round of tweaks to my transducer design, I am getting even better results. More excursion. More high frequencies. The overall sound is getting to be quite impressive for being entirely constructed of plastic.

I've been working on a feedback style transducer. After much experimentation, I've determined the best scheme given my design. The best part is that I only have to make changes to my bobbin. Everything is the same! I am currently getting a 4:1 ration of Static Field Induction vs. Electromagnetic Field Induction. All I need to do is get that ration up to 9:1. After the next few tweaks, I think I'll be there. Everyone has said that feedback will be the most difficult part. I tend to disagree. Given how long other aspects of the head have taken to achieve, I'm making fairly quick progress here. After I move, I should have feedback completed in a short time.

I suspect that I will be starting to sell these heads by 2016. Many options. Fully plastic models will be sold at very low prices. These will be perfect for entry level cutters looking to get experience without spending a fortune. I will be selling for about $500 or less. Hybrid plastic and metal will be option 2. Fully metal will be option 3. Dynamic or Feedback on any. Customized insets for the side panels will also be an option (replace my heptagram logo with your logo). Customize the color for all plastic parts.

Prepare to be amazed! Don't accept the status quo! Innovation is imminent.

[dimi751]

That's awesome Todd keep up the good work !

[opcode66]

While working on feedback in my Feedback Testbed, I realized that I did not have my magnets aligned properly with my transducer. After many changes to the body, mostly to get the stylus to align with the center pin of the platter, I neglected to move my magnet stacks appropriately. Now that the center of the magnet is directly beneath the center of the bobbin, I'm getting noticeably more high frequency and more perceived volume for the same level from my amp as I did in 1.B. I will be performing test cuts tomorrow. I should be getting much more highs now!

Here is a benchtop test of Bladerunner 1.C. I'm also demonstrating in the video how easy it is to assemble my cutterhead. Due to the highly modular design, I've made consumer end repairs possible. Each cutterhead will come with a spare Left and Right transducer module and the tool necessary to remove them. It is very simple.

Also, check out my progress with feedback in this new thread here http://lathetrolls.com/viewtopic.php?f=15&t=5610

[dimi751]

Wow super cool video, Now I understand a little more about feedback ded not realise there was another coil and magnat for feedback

[dimi751]

Hi Opcode

I guess I'm speaking for other users as well here, just wanted to know how progress is going for bladerunner any updates on this project I find this fascination and always interested thankyou