Hanoi Amator Project (HAP)

[Hanoi]

Hi,
This is my first post at Lathetrolls, after spending time Reading and learning, then try to do with what I already have, hope it works soon! Just show some pictures of my new project, just start! Pls give me comments and advices!

22050812_10210120658631313_1319018170_o by Nguyen Dang Thang, on Flickr
22016962_10210120653111175_1785126126_o by Nguyen Dang Thang, on Flickr
22016867_10210120653351181_650220873_o by Nguyen Dang Thang, on Flickr
22047432_10210120658071299_1077964221_o by Nguyen Dang Thang, on Flickr
22068663_10210120658151301_2050479104_o by Nguyen Dang Thang, on Flickr
22068957_10210120653711190_1346986374_o by Nguyen Dang Thang, on Flickr
22199120_10210146605239962_243377532_o by Nguyen Dang Thang, on Flickr
22171726_10210146605039957_1413310312_o by Nguyen Dang Thang, on Flickr
22171701_10210146605359965_2060958742_o by Nguyen Dang Thang, on Flickr
22140553_10210146604959955_670174540_o by Nguyen Dang Thang, on Flickr
22140346_10210146604599946_1951555650_o by Nguyen Dang Thang, on Flickr
22140415_10210146604479943_1242709201_o by Nguyen Dang Thang, on Flickr

Thank you!

[petermontg]

Looks like a fun project.

One thing, I wouldn't use wood to carry the over head. The mechanical movement could cause movement overtime in the support.

Best
Peter

[jjwharris]

What's the pitch of the leadscrew?/Where can i buy one?

[Hanoi]

Looks like a fun project.

One thing, I wouldn't use wood to carry the over head. The mechanical movement could cause movement overtime in the support.

Best
Peter

Yes, I know its better if I use in metal, however it is more difficult to make now, I will rebuild in metal when I finish some other parts: head cut, speed control,..
I'm wondering what should I choose the transducer: This one https://www.adafruit.com/product/1785 or https://www.adafruit.com/product/1784 or I DIY
pls give me advices, tk uuuuu!

[Hanoi]

What's the pitch of the leadscrew?/Where can i buy one?

You can find at CNC store to buy it.
This is one old arm of a robot, I think so

[Soulbear]

Hi There,

I'm wondering what should I choose the transducer: This one https://www.adafruit.com/product/1785 or https://www.adafruit.com/product/1784 or I DIY
pls give me advices, tk uuuuu!

The Sparkfun/Adafruit type transducers are not your only options. Have a look here for instance :- https://www.parts-express.com/cat/exciters-tactile-transducers/18 I've made an as yet "Untested" Cutterhead, my Soul Sculptor Head :- https://www.lathetrolls.com/viewtopic.php?f=15&t=6556 using these transducers, however Fred used some transducers of a similar type with great results (https://www.parts-express.com/dayton-audio-daex30hesf-4-high-efficiency-steered-flux-exciter-with-shielding-30mm-40w-4-oh--295-240) check this out where Fred shows the making of his Cutterhead too :- https://www.lathetrolls.com/viewtopic.php?f=22&t=6866
Hope this helps
Regards
Soulbear

[Hanoi]

Hi There,

I'm wondering what should I choose the transducer: This one https://www.adafruit.com/product/1785 or https://www.adafruit.com/product/1784 or I DIY
pls give me advices, tk uuuuu!

The Sparkfun/Adafruit type transducers are not your only options. Have a look here for instance :- https://www.parts-express.com/cat/exciters-tactile-transducers/18 I've made an as yet "Untested" Cutterhead, my Soul Sculptor Head :- https://www.lathetrolls.com/viewtopic.php?f=15&t=6556 using these transducers, however Fred used some transducers of a similar type with great results (https://www.parts-express.com/dayton-audio-daex30hesf-4-high-efficiency-steered-flux-exciter-with-shielding-30mm-40w-4-oh--295-240) check this out where Fred shows the making of his Cutterhead too :- https://www.lathetrolls.com/viewtopic.php?f=22&t=6866
Hope this helps
Regards
Soulbear

Thank you Soulbear, this helps me alot! Actually Iam based in Vietnam, so have to try to find which one I can buy easily.
And how many Watts the transducer should be, Soul?

[jjwharris]

Soulbear! I've been waiting so long to hear your cutterhead!

I'm embossing with that parts express speaker, it does work fairly well, you can check out my thread here; https://www.lathetrolls.com/viewtopic.php?f=15&t=7323

I've got some of the small adafruit transducers on the way at the moment

Not sure if anyone else had the same issue (I'm a little rough..) but the coil did decouple from the cone on the parts express speaker, I managed to reattach it but had to forfeit the centering ring, so I get some wild resonant frequencies

What are the specs on the stepper motors? Better than nema17s?

[Hanoi]

Hi jjwharris,
How is your project going? This is the spec of my stepper motor (28BYJ-48 12Vol), it is small and rather quiet.

Diameter: 28mm

Voltage: 12V

Stepping angle: 5.625 x 1/64

Reduction ratio: 1/64

5-wire 4-phase can use ordinary uln2003 chip driver,

Can also be connected to a 2-phase use can make supporting the development board

Use, direct plug, easy to use stepper motor used in the development board
http://thegioiic.com/upload/large/3643.jpg

[jjwharris]

I'm pretty happy with it, looking at improving the turntable and reducing stepper noise, that's why I'm interested in that stepper motor you're using, maybe I'll get one and give it a go.

[jjwharris]

Have you seen these stepper motor drivers?
https://www.youtube.com/watch?v=P3ebhi-vZRY

The silent step mode can lower torque, but, wow, that seems silent.

[Hanoi]

Have you seen these stepper motor drivers?
https://www.youtube.com/watch?v=P3ebhi-vZRY

The silent step mode can lower torque, but, wow, that seems silent.

I think noisy or silent is not depends on driver, it depends on how many step to make around, microstep... So it is motor and the way to write code for Arduino.

[jjwharris]

https://www.trinamic.com/fileadmin/assets/Products/ICs_Documents/TMC2130_datasheet.pdf

Page 49 of that PDF explains the silentchop mode, from my understanding it provides more of a PWM control which results in a smoother motor motion, but also lower torque. I imagine the issue would be if it miss-steps, from not enough torque mucking up your LPI.

On my setup I still get slight stepper noise despite isolating the stepper motor with a rubber belt and butanol and foam between components.

[Hanoi]

I change the motor to 24v AC, 1RPM and plus some pulley, it is very smooth and silent. The speed now is 5mm/min (is the speed ok??)
I also change as clip

Cheers!

[boryo]

Looks great! What this thing that you touch with your finger at the end of the video is doing and how do you call it in english?

Thanks,
Bob

[jjwharris]

That is quiet!

There is a guide on Aardvark http://www.aardvarkmastering.com/riaa.htm

You need to be looking at lines per inch

[EpicenterBryan]

You have a pretty course pitch lead screw there. The pulley ratio you have might be in the ball park for lead in / lead out - hard to tell from the video. If you swap the pulleys, it will get you closer to a reasonable rotation for normal grooves but still looks to fast for that lead screw to me. Can you tell us the pitch of that lead screw, and the RPM of the motor (or did I miss that)?

[Hanoi]

Looks great! What this thing that you touch with your finger at the end of the video is doing and how do you call it in english?

Thanks,
Bob

Haha, I dont know what to call it in English, I use that to carry the tonearm.

[Hanoi]

That is quiet!

There is a guide on Aardvark http://www.aardvarkmastering.com/riaa.htm

You need to be looking at lines per inch

Thank you J, this help me much!

[Hanoi]

You have a pretty course pitch lead screw there. The pulley ratio you have might be in the ball park for lead in / lead out - hard to tell from the video. If you swap the pulleys, it will get you closer to a reasonable rotation for normal grooves but still looks to fast for that lead screw to me. Can you tell us the pitch of that lead screw, and the RPM of the motor (or did I miss that)?

My motor is a gear motor, if connect directly to pitch screw I can not turn pitch screw to move back when finish cutting or I have to wait same time if change motor direction. So I add one more pulley to cut off manually.
The pitch screw is 2mm/round, motor is 1 RPM so I add Pulley to increase pitch screw speed to 2.5 RPM.