Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Interesting. Well, I can say these sound f-ing nice.
Another thing to consider. Unlike a spring in a stereo 45/45 style transducer wherein sound transmission is through the spring more or less directly, these only supply tension. Shot springs or springs made of thinner wire will be more bass centric because they will supply less damping.
All mono cutterheads are comprised of: voice coil, pivot, tensioning mechanism, damper, armature, frame and cover.
Another thing to consider. Unlike a spring in a stereo 45/45 style transducer wherein sound transmission is through the spring more or less directly, these only supply tension. Shot springs or springs made of thinner wire will be more bass centric because they will supply less damping.
All mono cutterheads are comprised of: voice coil, pivot, tensioning mechanism, damper, armature, frame and cover.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
FYI I've posted a 5C head for sale. Details here https://www.lathetrolls.com/viewtopic.php?f=4&t=8226
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
OPCODE 1-E Mono Cutterhead Cost Breakdown
This may not be final. But, this is what things are looking like right now. I just made a bunch of springs. And, I'll be posting a video about the brass armature I just machined soon.
Machining and Materials
- Armature
5 hr machine time = $300
2 parts in Nickel Plated Brass with Steel Crossbar
- Springs
0.5 hr machine time = $30
Formed Music Wire
- Stylus Screw
1 hr machine time = $60
2 parts in Nickel Plated Brass and Knurled Aluminum Cuff
- Terminal Block
0.75 hr machine time = $45
3 parts in Space Age Plastic and Nickel Plated Copper
- Steel Pole Piece Inserts
0.5 hr machine time = $30
- Fasteners
6 set screws, 15 screws, Threaded Mounting Sockets = $8
- 3d Printed Plastic Body
1.5 hr Print Time = $75
8 parts in PLA
- Magnets
Neodymium Magnets = $8
- Twisted Wire
It takes time to make it nice… $4
Subtotal = $560
Assembly, Calibration, Profit
- Need to pay bills…. $240
Grand Total = $800
This may not be final. But, this is what things are looking like right now. I just made a bunch of springs. And, I'll be posting a video about the brass armature I just machined soon.
Machining and Materials
- Armature
5 hr machine time = $300
2 parts in Nickel Plated Brass with Steel Crossbar
- Springs
0.5 hr machine time = $30
Formed Music Wire
- Stylus Screw
1 hr machine time = $60
2 parts in Nickel Plated Brass and Knurled Aluminum Cuff
- Terminal Block
0.75 hr machine time = $45
3 parts in Space Age Plastic and Nickel Plated Copper
- Steel Pole Piece Inserts
0.5 hr machine time = $30
- Fasteners
6 set screws, 15 screws, Threaded Mounting Sockets = $8
- 3d Printed Plastic Body
1.5 hr Print Time = $75
8 parts in PLA
- Magnets
Neodymium Magnets = $8
- Twisted Wire
It takes time to make it nice… $4
Subtotal = $560
Assembly, Calibration, Profit
- Need to pay bills…. $240
Grand Total = $800
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Presto Armature in Brass
OR...
Bob Hates When I Do Machining
OR...
Bob Hates When I Do Machining
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Very very nice Todd - fantastic work as always
I mentioned this before but are you able to offer this head with a VR mounting post please?
I'm guessing that there'll be additional costs involved as you'll need to measure where the post should be so that the 1-E stylus lands in the same place as the standard VR head.
Thanks
I mentioned this before but are you able to offer this head with a VR mounting post please?
I'm guessing that there'll be additional costs involved as you'll need to measure where the post should be so that the 1-E stylus lands in the same place as the standard VR head.
Thanks
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
You know this is a Presto 1-D clone right? It is modernized. But, a dynamic mono cutterhead nonetheless. Are you confusing this with Mantra V2???
Either way, I had access to a VR cutterhead. I took measurements with a caliper and created a CAD drawing of the body. This includes measurements for where the stylus holder hole is and where a typical stylus tip would be in relation to the body. Therefore, I can overlap that onto any other design and make a mount that will align my work to the VR overhead.
Short answer yes for all my work.
Either way, I had access to a VR cutterhead. I took measurements with a caliper and created a CAD drawing of the body. This includes measurements for where the stylus holder hole is and where a typical stylus tip would be in relation to the body. Therefore, I can overlap that onto any other design and make a mount that will align my work to the VR overhead.
Short answer yes for all my work.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Thanks for the quick reply Todd - I'll drop you quick PM to explain my rather specialised reasons for asking you!
PM sent (in a few minutes)
PM sent (in a few minutes)
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Making a Helical Tension Spring for the switchblade head popping mechanism in my lathe overhead suspension box. I machined a Mandrel from Aluminum Round Bar. Axial 2.5mm hole drilled on the lathe with the bit in the headstock and the part in a v slot tool holder. Moved the tool holder to a vice and tapped the 4-40 threads with a tapping rig and cutting fluid. It worked fantastic. I added a ground flat spot under the screw not seen in this video. The screw holds the music wire. Chuck it in the headstock. Use vise grips to hold the other end. Turn the chuck by hand.
Note: mandrel diameter is calculated based on the requirements for the spring. There is math for it. There are online calculators for springs as well as Machinery's Handbook section.
Note: mandrel diameter is calculated based on the requirements for the spring. There is math for it. There are online calculators for springs as well as Machinery's Handbook section.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Presto Armature Brass Part 2
Looks great on the bench. Can't wait to put the spring holes in and install this in the next OPCODE 1-E Presto Clone!
Looks great on the bench. Can't wait to put the spring holes in and install this in the next OPCODE 1-E Presto Clone!
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
C2 Mini Lathe Maintenance
New Precision Bearings and a new Spindle installed in the headstock. Extremely minimal runout now!
New Precision Bearings and a new Spindle installed in the headstock. Extremely minimal runout now!
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
- fredbissnette
- Posts: 383
- Joined: Tue Oct 11, 2016 5:38 pm
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
been following your youtube
what you are doing is pretty darn impressive
big up!
fred
what you are doing is pretty darn impressive
big up!
fred
Instagram @styluspressurerecords
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
I'll have a new OPCODE 1-E clone fully built Sunday evening and bench test posted here. I've had to make a couple tweaks to some parts to accommodate the armature design I've created. As of now, the build seems like its going to be very impressive. I can't wait to actually electrify the voice coils. More very soon!
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Here's what I've been doing....
OPCODE S66 Suspension Box. Made for RCA Portables, Presto's, nearly any other portable or Frankenlathe. Currently made in plastic. All or selected parts can now be machined in metal with zero changes. Vertical adjustment, lateral adjustment, infinite analog depth control via a self designed solenoid, switchblade head release mechanism with manual and custom solenoid control, head up/down custom read switch indicator, flanged bearings, neumann mount, counterweight spring (I made the springs too!), finishing the viscous fluid dashpot now. The internal space is a mere 10.8 cubic inches. The box is on a sled that can rid on a leadscrew, and has a linear bearing embedded in back. It is essentially a mini Neumann suspension. I can build these parts into a larger professional suspension later. OPCODE 1-E Advanced Mono Cutterhead with Heating wire terminals and mini connectors. Wiring changes are now a breeze. The heating wire terminal attachment is compatible with original Presto 1-C and 1-D cutterheads as well. PLS19 Portable Lathe System - First platter motor test. Needs tweaks. Also, a different motor. But, successful! Running at 33.3 RPM
OPCODE S66 Suspension Box. Made for RCA Portables, Presto's, nearly any other portable or Frankenlathe. Currently made in plastic. All or selected parts can now be machined in metal with zero changes. Vertical adjustment, lateral adjustment, infinite analog depth control via a self designed solenoid, switchblade head release mechanism with manual and custom solenoid control, head up/down custom read switch indicator, flanged bearings, neumann mount, counterweight spring (I made the springs too!), finishing the viscous fluid dashpot now. The internal space is a mere 10.8 cubic inches. The box is on a sled that can rid on a leadscrew, and has a linear bearing embedded in back. It is essentially a mini Neumann suspension. I can build these parts into a larger professional suspension later. OPCODE 1-E Advanced Mono Cutterhead with Heating wire terminals and mini connectors. Wiring changes are now a breeze. The heating wire terminal attachment is compatible with original Presto 1-C and 1-D cutterheads as well. PLS19 Portable Lathe System - First platter motor test. Needs tweaks. Also, a different motor. But, successful! Running at 33.3 RPM
You do not have the required permissions to view the files attached to this post.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
PLS19 Platter Motor Feedback Control Logic Test
I've added eight magnets to the gear reduction wheel. I also added a magnetic sensor to the plinth. Using an Arduino Uno I'm able to take the magnetic input as feedback and determine an accurate rolling average for rotational speed. I'm also generating PWM to control a standard Motor Controller. All told, this creates a nice realtime locked platter motor that can generate output for a pitch computer. Not bad for one night's work. FYI the middle band is 33.3 RPM. And, all I need to do is set the value of a floating point variable to get 45 or 78 RPM. Both also tested!!!
I've added eight magnets to the gear reduction wheel. I also added a magnetic sensor to the plinth. Using an Arduino Uno I'm able to take the magnetic input as feedback and determine an accurate rolling average for rotational speed. I'm also generating PWM to control a standard Motor Controller. All told, this creates a nice realtime locked platter motor that can generate output for a pitch computer. Not bad for one night's work. FYI the middle band is 33.3 RPM. And, all I need to do is set the value of a floating point variable to get 45 or 78 RPM. Both also tested!!!
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
Lovely work opcode66.opcode66 wrote:Here's what I've been doing....
Just out of interest, how much does your head weigh?
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
It is extremely light in plastic. I can machine the base plate and back sections from brass which would add a lot of weight, but also add to the overall cost. The covers front and back will always be plastic. I've made a weight attachment for the front of the case as seen in the pictures above.
and now....
PLS19 Motor Control Stable!!!!!
After a couple of days/nights of r&d I finally have very stable, efficiently and cleanly written platter motor control logic. The results are phenomenal. Have a look for yourself!
and now....
PLS19 Motor Control Stable!!!!!
After a couple of days/nights of r&d I finally have very stable, efficiently and cleanly written platter motor control logic. The results are phenomenal. Have a look for yourself!
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
PLS19 Custom Tonearm Design
Only thing missing is the spring, wiring, and connector pins.
Only thing missing is the spring, wiring, and connector pins.
You do not have the required permissions to view the files attached to this post.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
PLS19 Motor Control V14 - WOW, WOW and More WOW!!!!!!
I think I've cracked the secrets to precision BLDC motor control. I'll be tweaking some values which will allow for even better control than this. But, this is not too bad.... Moving this code to a real PIC32MX processor will allow me at least one additional order of magnitude of precision with better timer interrupts. Arduino is sort of for kids and has a lot of overhead to run. Getting real, non-preempted, quartz accurate interrupts is just not possible in Arduino. Anyone who uses this platform for doing any DSP or Motor Control is immediately at a disadvantage. However, this works for now.
I think I've cracked the secrets to precision BLDC motor control. I'll be tweaking some values which will allow for even better control than this. But, this is not too bad.... Moving this code to a real PIC32MX processor will allow me at least one additional order of magnitude of precision with better timer interrupts. Arduino is sort of for kids and has a lot of overhead to run. Getting real, non-preempted, quartz accurate interrupts is just not possible in Arduino. Anyone who uses this platform for doing any DSP or Motor Control is immediately at a disadvantage. However, this works for now.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
PLS19 Tonearm V1
Needs some tweaks for sure. But, very close to what I want.
Needs some tweaks for sure. But, very close to what I want.
You do not have the required permissions to view the files attached to this post.
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Re: OPCODE 1-E Mono Cutterhead (Presto 1-D Clone)
PLS19 Moto Control Enhancements
- Switch Inputs for start/stop and speed change 33 to 45
- Serial Remote Control
- 33/45/78 demonstration
- Switch Inputs for start/stop and speed change 33 to 45
- Serial Remote Control
- 33/45/78 demonstration
Cutting, Inventing & Innovating
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio
Groove Graphics, VMS Halfnuts, MIDI Automation, Professional Stereo Feedback Cutterheads, and Pesto 1-D Cutterhead Clones
Cutterhead Repair: Recoiling, Cleaning, Cloning of Screws, Dampers & More
http://mantra.audio