Been wanting to get back to the shop for the longest time. My last post to this site was about 2 years ago... Anyway, blame Terence, whom has been showing off his work.
A young man contacted me on Carousell asking if I'm also into CNC. He would like to customize some wheels, which are used as rollers on his slot car. From what I understand from him, the rollers would ride against the wall of race tracks, guiding the car along the track.
He forwarded me some pix:
A young man contacted me on Carousell asking if I'm also into CNC. He would like to customize some wheels, which are used as rollers on his slot car. From what I understand from him, the rollers would ride against the wall of race tracks, guiding the car along the track.
He forwarded me some pix:
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He bought some blanks and would like to have them machines tongue design he wants. We chatted thru Carousell and migrated to Whatsapps with pix flowing to and fro. Based on what was told to me, i put them into 3D models.
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But I find the spokes too thin at 1mm. So I reduced the number of spokes to 6 instead.
From his response, I know that he still prefers having 8 spokes than 6. So I went back to the drawing board and made some adjustments:
After having dinner with my girls at an overcrowded Korean BBQ restaurant at SOTA, I went by the young man's place to pick up the blanks.
Don't ask me why some came with the blue plastic ring and some don't. I don't know anything about slot car till now.
I imported the 3D model into BobCadCam and extracted the bottom edges. The features I'll be working on are the spokes since I'm given the blanks. After computing the toolpath, I ran the simulator to make sure.
I imported the 3D model into BobCadCam and extracted the bottom edges. The features I'll be working on are the spokes since I'm given the blanks. After computing the toolpath, I ran the simulator to make sure.
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I'm giving the rapid height a bigger value to clear the cap screw which I plan to use to hold the wheels.
Next will be to find the right sized capscrew to use. The centre hole is slightly less than 5mm, which is to be used to press in a 520 bearings. M5 capscrew seems about right but there is some tiny bit of movement. Also, the capscrew head is a tad too big. I've it turned down to just slight more than 6mm.
Next will be to find the right sized capscrew to use. The centre hole is slightly less than 5mm, which is to be used to press in a 520 bearings. M5 capscrew seems about right but there is some tiny bit of movement. Also, the capscrew head is a tad too big. I've it turned down to just slight more than 6mm.
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| Terence suggested I try using a countersink screw as it would centre itself to the countersink.. As I do not have a suitable one, I'll make a trip down Kelantan Road sometime next week. Just to have a feel of how it would look: |  |
Ok. That's all for now. I'll see if I can get some work down tomorrow cutting some blanks to test. Wouldn't want to try it on the actual thing.
Meanwhile, Be blessed!
Meanwhile, Be blessed!
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