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#1

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
06 May 2019 10:06 pm

As part of my therapy for depression I am starting this thread both as a diy guide for others but for me too angel
I'm going to show the steps I take and the final costings at the finish. No this is not my idea, just my interpretation .

Making the slant base

1557140276_1.jpg

1557140289_2.jpg

1557140312_3.jpg

1557140334_4.jpg

1557140366_5.jpg

Setting up the motor position

1557140456_6.jpg

1557140477_7.jpg

Motor is a sewing machine motor with a foot pedal speed controller, threaded shaft is 1/2 " whitworth bolt with the head cut off and a locating hole bored into the end with a locking grub screw in the side. Much longer than I need but pretty easy to cut off to the required length

Last edited by xcvator (06 May 2019 10:07 pm)

7 users like this post: LoneWolf, goody2shoes, RockRat, havenacrack, Telling Ghosts, Flowerpot, Ded Driver

#2

LoneWolf
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From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 3,302
Member
06 May 2019 10:53 pm

Give the MDF a couple of coats of good paint as Cabbing + Water + MDF = a mess.... Keen to see the finished product... thumbsup Love the Homemade gear, as the prices of Lapidary gear is horrendous.... argh

LW...

Last edited by LoneWolf (06 May 2019 10:55 pm)


Growing Old is Inevitable.... Growing Up is Optional.... Prospectors United Will Never Be Defeated

1 user likes this post: goody2shoes

#3

Theduke
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From: , NT
Joined: 29 April 2017
Posts: 251
Member
06 May 2019 11:00 pm

You could maybe get a “test” tin of floor epoxy from your local paint shop to paint it with if you’re lucky enough it might be a nice freebie

2 users like this post: LoneWolf, goody2shoes

#4

LoneWolf
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From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 3,302
Member
06 May 2019 11:29 pm

A 750ml Epoxy kit from ebay is only around $40....
https://www.ebay.com.au/itm/EPOXY-RESIN … a5e84f0be1

LW...


Growing Old is Inevitable.... Growing Up is Optional.... Prospectors United Will Never Be Defeated

1 user likes this post: goody2shoes

#5

xcvator
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From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
09 May 2019 09:18 pm

Started over today as I wasn't happy with a couple of stuff ups, mdf is cheap wink still the same basic setup

Located the motor properly and had a little cut out to do for the shaft cover to fit

1557395608_8.jpg

Then clamped the motor in position

1557395715_9.jpg

The dish or whatever you call it with the shaft cover

1557395800_10.jpg

1557395925_12.jpg

It will sit something like this, I hope and it's a bit wider than I really wanted but the price was right smile

1557395907_11.jpg

It's a "fruit tray " from target, 9" cake tins are like gold sad

Still got to do a cut out for the power plug, cut down the shaft sleeve to the right length, cut down the shaft, 38 coats of paint to waterproof the beast, mount the dish, fit drain, work out a stand for a water bottle , cover over the motor and power plug.

Then I can start the grinding disks, got some 4mm marine ply for that, still got to get some sort of foam for the sandpaper backing ( suggestions please )

When I've finished I'll list all the bits I have bought and costings, so far $83.63

3 users like this post: 7.62marksman, LoneWolf, goody2shoes

#6

Telling Ghosts
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Joined: 01 March 2019
Posts: 23
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09 May 2019 09:40 pm

Nice one, I'm looking forward to seeing how it all goes! thumbsup
-TG

#7

LoneWolf
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From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 3,302
Member
10 May 2019 10:42 am

You could just buy a sanding backing discs from Bunnings that has Velcro on it so you can use Velcro backed sanding discs... These are very cheap from Ebay...

LW....


Growing Old is Inevitable.... Growing Up is Optional.... Prospectors United Will Never Be Defeated

1 user likes this post: goody2shoes

#8

xcvator
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From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
16 May 2019 08:13 pm

Disaster I think ops
Cut some discs out of 4mm marine ply and tried 1 on the machine, oh dear, lots of vibration and shaking, so much the whole thing was walking across the bench. poop

I'm not sure just whether it's because the disc is not perfectly round or whether the spindle is not running perfectly straight, guess the only way to find out is to get a master disc and try that, I found a cheap 1 at this place.
https://www.gemworld.com.au/products/mo … er-lap-new

Do you think it's worth a try ?

1 user likes this post: goody2shoes

#9

LoneWolf
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From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 3,302
Member
16 May 2019 09:12 pm

For the price, it's worth a shot... You don't need anything too expensive when you are just starting out... Go easy and take things slowly. When you feel like it, you can step up in price.. Remember Lapidary IS Expensive if you let it.....
Very hard cutting perfect circles that are used for anything spinning... It took me 2 days to cut and grind a round disc of 10mm steel plate for my flat lap...

LW....


Growing Old is Inevitable.... Growing Up is Optional.... Prospectors United Will Never Be Defeated

2 users like this post: xcvator, goody2shoes

#10

xcvator
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From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
16 May 2019 09:36 pm

Done

3 users like this post: Theduke, goody2shoes, LoneWolf

#11

Redfin
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Joined: 26 February 2013
Posts: 2,320
Member
16 May 2019 11:26 pm

xcvator wrote:

Disaster I think ops
Cut some discs out of 4mm marine ply and tried 1 on the machine, oh dear, lots of vibration and shaking, so much the whole thing was walking across the bench. poop

I'm not sure just whether it's because the disc is not perfectly round or whether the spindle is not running perfectly straight, guess the only way to find out is to get a master disc and try that, I found a cheap 1 at this place.
https://www.gemworld.com.au/products/mo … er-lap-new

Do you think it's worth a try ?

The ply is inconsistent weight bearing.
For a disc to spin smoothly the weight must be evenly distributed.


Det used - Whites 6000D, ML SD2000, ML SD 2001, ML SD 2200D, Garrett Infinium. Minelab SDC 2300. Minelab GPZ 7000.
Current Det - Garrett ASD Groundhog. . Minelab GPX 5000. Minelab GPX 4500.

1 user likes this post: LoneWolf

#12

LoneWolf
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From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 3,302
Member
16 May 2019 11:56 pm

xcvator wrote:

Done

At least you are going to find out if was your ply as Redfin has suggested, or your cutting of the ply or your spindle on the motor... Well worth the $8+ to find out...

I think you will find it is the first one or a combo of the first two... thumbsup

Oh and to answer a Question you asked about Dopping, Wax can be a tricky thing for a Beginner... I would try Epoxy or superglue.. Then you can try some wax when you get a better idea... Some I know have never used Wax, they say it can be a pain to work with but have won awards, others swear by it and have won awards... Each to their own...

LW......

Last edited by LoneWolf (17 May 2019 12:11 am)


Growing Old is Inevitable.... Growing Up is Optional.... Prospectors United Will Never Be Defeated

#13

xcvator
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From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
17 May 2019 08:14 pm

Bloody out of stock, geeze I wish people would update their websites when they're selling stuff mad

I think I'll have to put this project on the back burner now for a couple months, heading for Lightning Ridge and the Gem Fields start of June, If I order stuff from China it won't get here before I go away cry

2 users like this post: goody2shoes, LoneWolf

#14

LoneWolf
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From: Gold Coast, QLD
Joined: 12 April 2016
Posts: 3,302
Member
17 May 2019 08:57 pm

You may be surprised, I have got things from China in a Week.... Have you looked around for other sites that sell them?

This is the type of sanding backing Pad I was talking about.. https://www.ebay.com.au/itm/125mm-Backi … Sw7Khcf5NH

Find out the thread size on your spindle and see if they make one to suit or you can get adaptors to suit... Then all you need to do is order the right type of sanding disc... they are cheap enough to buy one for every grit you use so there is no chance of cross-contamination of grits... Just an idea... I use these often... And you can get them in lots of different sizes.....

LW....

Last edited by LoneWolf (17 May 2019 09:00 pm)


Growing Old is Inevitable.... Growing Up is Optional.... Prospectors United Will Never Be Defeated

#15

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
18 May 2019 05:36 pm

LoneWolf wrote:

You may be surprised, I have got things from China in a Week.... Have you looked around for other sites that sell them?

This is the type of sanding backing Pad I was talking about.. https://www.ebay.com.au/itm/125mm-Backi … Sw7Khcf5NH

Find out the thread size on your spindle and see if they make one to suit or you can get adaptors to suit... Then all you need to do is order the right type of sanding disc... they are cheap enough to buy one for every grit you use so there is no chance of cross-contamination of grits... Just an idea... I use these often... And you can get them in lots of different sizes.....

LW....

I found 1, 8 inches Diameter but I can't seem to find any wet'n'dry discs with h&l backing to suit ops

Did a bit of experimenting today and I think the main problem is my home made discs or out of wack too much, bugga.

Last edited by xcvator (18 May 2019 05:36 pm)

1 user likes this post: LoneWolf

#16

Manpa
Member
From: Sheidow Park, SA
Joined: 06 January 2018
Posts: 2,582
Member
18 May 2019 05:54 pm

xcvator wrote:
LoneWolf wrote:

You may be surprised, I have got things from China in a Week.... Have you looked around for other sites that sell them?

This is the type of sanding backing Pad I was talking about.. https://www.ebay.com.au/itm/125mm-Backi … Sw7Khcf5NH

Find out the thread size on your spindle and see if they make one to suit or you can get adaptors to suit... Then all you need to do is order the right type of sanding disc... they are cheap enough to buy one for every grit you use so there is no chance of cross-contamination of grits... Just an idea... I use these often... And you can get them in lots of different sizes.....

LW....

I found 1, 8 inches Diameter but I can't seem to find any wet'n'dry discs with h&l backing to suit ops

Did a bit of experimenting today and I think the main problem is my home made discs or out of wack too much, bugga.

Xc, sent you a text message via phone about your discs
Manpa


One of these days Ma!

#17

RockRat
Member
Joined: 26 May 2018
Posts: 281
Member
18 May 2019 07:22 pm

Redfin wrote:
xcvator wrote:

Disaster I think ops
Cut some discs out of 4mm marine ply and tried 1 on the machine, oh dear, lots of vibration and shaking, so much the whole thing was walking across the bench. poop

I'm not sure just whether it's because the disc is not perfectly round or whether the spindle is not running perfectly straight, guess the only way to find out is to get a master disc and try that, I found a cheap 1 at this place.
https://www.gemworld.com.au/products/mo … er-lap-new

Do you think it's worth a try ?

The ply is inconsistent weight bearing.
For a disc to spin smoothly the weight must be evenly distributed.

mate,
I can cut you some discs on my laser, pm me size of disc and hole size. I will use cast acrlic.
RR

1 user likes this post: LoneWolf

#18

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
19 May 2019 11:39 am

Sounds good RR, pm sent thumbsup

#19

Manpa
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From: Sheidow Park, SA
Joined: 06 January 2018
Posts: 2,582
Member
19 May 2019 01:30 pm

Good option Xc, should be nicely balanced in comparison to the plywood, plus waterproof.

Cheers


One of these days Ma!

1 user likes this post: LoneWolf

#20

RockRat
Member
Joined: 26 May 2018
Posts: 281
Member
19 May 2019 05:42 pm

all done xcavator, plus some wood washers to stop
the acrylic cracking when you tighten the nut.1558248121_imag5514_1_1.jpg

3 users like this post: Manpa, Wishfull, goody2shoes

#21

Gilly47
Member
From: Currently on Tour, QLD
Joined: 18 January 2015
Posts: 691
Member
24 May 2019 01:04 am

hello mr Vator where will you be in the Gemfields.

we are in rockhampton, preparing for a trip to Mt Surprise, then the gemfields for the duration of the winter

ray


1 wife 1 dog and a sieve. NAPFA & QSMA member,

#22

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
24 May 2019 11:42 am

Hey Gilly pm sent

#23

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
24 May 2019 11:55 am

Well the postman brought me a nice little parcel from RR thumbsup thumbsup several acrylic discs and a couple of wooden ones.

Just gave them a very quick try out as I don't have time to fiddle with them this morning. At medium speed ( this motor goes up to 10,000rpm) they run very well with very little vibration, some rubber feet under the machine might absorb this.
I'm especially interested with the wooden ones as I would be able to glue w&d sandpaper to them and remove it when it's worn out.
Any body know of an adhesive that could be used to do the same with the acrylic discs as they run a bit better than the wooden ones

1 user likes this post: goody2shoes

#24

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
25 May 2019 12:18 pm

I have found the speed/foot control that came with the motor bit hard to set at a low ( 2000 rpm ) speed so I've just ordered 1 of these, last of the big spenders lol

https://www.ebay.com.au/itm/AU-220V-400 … .l4275.c10
I might have to make up a cover for it to keep water away, maybe just a little plastic tub with some holes on the side furthest away from any water source. ops

1 user likes this post: goody2shoes

#25

xcvator
Member
From: A Wide Brown Land
Joined: 12 September 2016
Posts: 1,468
Member
26 May 2019 01:35 pm

Had a play with RR's discs today thumbsup They run very well, very smooth considering they are on an Elcheapo motor and splindle clap
Got some spray on contact adhesive and sprayed it onto the acrylic discs then turned them upside down onto some 4mm foam from Clarkerubber, laid a bit of old mdf on top with a small weight for about 30 minutes, then cut around them with a VERY ( snap off blade) sharp knife. The 1st 1 I did a bit quick and got a few daggy bits sticking out the sides, so the others I took a lot longer, angled the knife under the discs a bit with a bit more pressure and they came out pretty good.
Next came the centre hole, tried to cut the 1st 1 with the knife sad didn't come out very well, very daggy , so then tried a very small screw driver (3mm wide blade ). Placed the disc foam side down on the bench and proceeded to hammer the screw driver through the foam all around the centre hole, plug popped out nearly perfect thumbsup thumbsup big_smile

Black is foam side up,Red is acrylic side up
1558837706_img_20190526_120340_.jpg

1558837736_img_20190526_120402_.jpg

Another trick with this setup is to start the motor in the highest speed then slow it down to the working speed, it seems to vibrate a fair bit at lower speeds at start up, but doesn't if you slow it down.

2 users like this post: goody2shoes, LoneWolf

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