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darrenking
(@darrenking)
Customer
Technician
Rep Points: 539
Joined:2 years ago
Posts: 204
15/05/2020 1:47 am  

I’ve been building up to this for a while and have had some preliminary sketches kicking around since pre-Covid-19, yes, as long ago as that!! The fact that I have now got  6 or 7 sets of sides that will need profiling at some stage has moved this project up the priority list (ahead of the fret slot saw) so today I started the CNC machining of the top plate and the drive gear ring for the main turntable. This has 100 teeth and the other small gear, which will will be mounted on the motor spindle, has 10 so the sanding disk will be spinning at about 140rpm. I do have a speed controller as well so if this seems a little fast I can slow it down a bit. The gears are created with a little app in VCarve called Gear Maker and, once created, I can export them as Illustrator files and incorporate them in my main drawings.

I laser cut a trial in 2mm MDF to allow me to check the spacing of the gear centres but I think it all looks ok so far. The main turntable bearing is a 450mm diameter heavy duty lazy Susan rotary thing which I am hoping is up to the job.

The sanding dishes will simply locate on the turntable on registration pins so they can be easily swapped over for different radii or for flat.

More pics to follow soon.

CHeers

Darren

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mark bailey
(@markbailey)
Guitar Making God
Joined:2 years ago
Posts: 455
15/05/2020 12:56 pm  

Wooaahh! Want one...!!

Measure twice, cut once...


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darrenking
(@darrenking)
Customer
Technician
Rep Points: 539
Joined:2 years ago
Posts: 204
15/05/2020 9:08 pm  

I‘ve had a busy day! All the parts are machined and mostly assembled, with the exception of the spacers that will form the sides of main turntable assembly. Tomorrow I will machine a new MDF dish with the 8mm drive pin holes in. Not sure if I will need a central screw to hold the dish to the turntable but this can be added is required later. I will also draw up the plywood base unit, which will have storage shelves for a couple of radiused dishes and for a flat one for the rim front.

I have run it and it spins really nicely although it is a bit noisier that I expected. Maybe the ‘lazy Susan’ bearing ring is being pushed a little hard but it will have to do for now. Hopefully it will settle down a bit once it has been run for a bit.

Further updates over the weekend if I manage to find time between watching all the Live Streaming!

Cheers

Darren

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Chris
(@chrismcconnell1011)
Hobbyist
Rep Points: 58
Joined:2022 years ago
Posts: 19
16/05/2020 6:56 pm  

Wow! This is awesome, stick up a wee video once it's running!


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darrenking
(@darrenking)
Customer
Technician
Rep Points: 539
Joined:2 years ago
Posts: 204
17/05/2020 1:30 am  

It lives!! I didn’t have time to machine the sanding dish itself today but the rest of the machine is fully assembled, wired up and ready to go! I have mounted the speed controller knob on the underside as this won’t need to be played with on a regular basis. The main NVR switch is mounted on the front panel and the start seems to be fairly soft so I’m not worried about the laminate drive gear coping with the strain. I’m now in two minds about mounting it on a permanent base as it will take up so much more space whereas now, apart from the motor, the whole assembly only measures just over 75mm thick and could easily be stored on edge when not in use and now be clamped to a bench when needed. I hope to have pics and vids of it being used ‘in anger’ in the next week or so, just depends on other work demands.

Cheers everyone

Darren

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Deej
 Deej
(@david-johnson09)
Semi Professional
Rep Points: 363
Joined:2 years ago
Posts: 74
21/05/2020 5:38 pm  

Looks awesome..


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Russ
 Russ
(@russ)
Semi Professional
Rep Points: 296
Joined:1 month ago
Posts: 45
19/06/2020 11:34 pm  
Posted by: @darrenking

It lives!! I didn’t have time to machine the sanding dish itself today but the rest of the machine is fully assembled, wired up and ready to go! I have mounted the speed controller knob on the underside as this won’t need to be played with on a regular basis. The main NVR switch is mounted on the front panel and the start seems to be fairly soft so I’m not worried about the laminate drive gear coping with the strain. I’m now in two minds about mounting it on a permanent base as it will take up so much more space whereas now, apart from the motor, the whole assembly only measures just over 75mm thick and could easily be stored on edge when not in use and now be clamped to a bench when needed. I hope to have pics and vids of it being used ‘in anger’ in the next week or so, just depends on other work demands.

Cheers everyone

Darren

16C4DB56 20AC 4DB1 9A9E 2DF00B65BEAD
8ACC6C08 5611 4987 B106 8B2B7716E3AD
162C1AD4 BD48 4DB8 AE2E 83840E294600
94144FCE D189 4EA6 B177 D4062F7DC89E
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Such skill Darren. Very Impressed.

Cheers,

Russ 🎸😀✌️


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mark bailey
(@markbailey)
Guitar Making God
Joined:2 years ago
Posts: 455
20/06/2020 10:56 am  

I've got a bench you could mount it on 😉 ! Seriously when can I have one?!

Measure twice, cut once...


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