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New member, sweet find at the auction, and a massive gantry

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Simko
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Sun Apr 17, 2016 7:53 am

First motion!

I jogged the table and moved it in auto yesterday! I made a crappy sharpie marker holder out of a PVC drain connector, a short section of 3/4" PVC, a spring, and some fittings. It worked good enough for testing, but it has too much flex in the assembly to be worth keeping. The band-clamp was put on to take the play out of the slip joint, but still allow it to move up and down. Even with that in place. the whole assembly still flexed and didn't translate fine details well to the paper.

It took a little bit of digging around to find where things were like switch offset, and where to change the torch cutting height, but I feel like I have a better basic understanding of where everything is.

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Re: New member, sweet find at the auction, and a massive gantry

Postby Capstone » Sun Apr 17, 2016 6:18 pm

Awesome Steve. Glad to see you've stuck with this!! Now the actual work/fun parts come. Making all of that cut something with a plasma torch. ;) We're all still here.
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Re: New member, sweet find at the auction, and a massive gantry

Postby exapprentice » Mon Apr 18, 2016 6:34 am

Hi Steve

hopefully the problem you have encountered with your pen marker shows vaguely what might happen to a torch that's sticking out to far :(
especially when you start moving things around a lot faster
It will only take a very small amount of play at the fixed point to magnify into bigger amount at the business end :(
Then going back the other way it will only take a reasonable knock (collision) at the business end to magnify into a lot bigger force at the fixed point :(
comes back to your other question regarding the water tray and gap between the slats and the gantry.

Your doing a cracking job so I am sure you will continue and finish of with a brilliant bit of kit to be proud of :D

so much to think about with out trying to second guess everything as well :lol:
Knowing what I know now the table build was the easy bit :shock:
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Re: New member, sweet find at the auction, and a massive gantry

Postby acourtjester » Mon Apr 18, 2016 11:16 am

One thing you may try is put blocks on the table and then your writing surface to bring the tip into the height it will be used to cut. I also use a ball point pen as a marker you get much better detail to check the movements of the tip. That way you can see how well the start and finish connect.
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Wed Apr 27, 2016 5:08 pm

5' X 10' :shock:

It looks a lot bigger in person than when you are drawing it up in AutoCAD. LOL

It took five sheets of 12ga to make the pan (all tigged), the slat holders and (53) 3" slats. Nothing nested well because of the size of the pieces, so I have a bunch of big drops for practicing. ;)

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Re: New member, sweet find at the auction, and a massive gantry

Postby acourtjester » Wed Apr 27, 2016 8:01 pm

You be in the final stretch maybe burning metal over the week end??? 8-) :)
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Wed Apr 27, 2016 8:17 pm

I was doing a test fit on the slats and each half of the tray has a slight maybe 1/8" bow in the middle which causes the slats to rock left to right. The bow is easily pushed flat, but I will have to figure something out. Anyone got any ideas?

1) Drill holes in the pan and plug weld down to the table
2) Use some of that fancy 3M VHB tape to hold the bowed part of the tray down
3) Shim the side slat holders to the right height (probably not a good idea if the water pushes the middle down. LOL
3) Hope that the weight of the slats and the water pushes the tray flat (seems like it might based on how easy the bow pushes flat)

I wish I was cutting some metal this weekend. Still have to paint, build some sort of torch mount, and buy a plasma cutter. 8-)
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Re: New member, sweet find at the auction, and a massive gantry

Postby acourtjester » Wed Apr 27, 2016 10:36 pm

The last water table ( for a 4X8) I welded up had some warps in it but I had a separate slat grate. That with the water weight held it flat when filled. It was 18 Ga metal. Try a test fill and see what happens.
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Thu Apr 28, 2016 8:50 am

acourtjester wrote:The last water table ( for a 4X8) I welded up had some warps in it but I had a separate slat grate. That with the water weight held it flat when filled. It was 18 Ga metal. Try a test fill and see what happens.


That could be a good idea. I made slat holders like Bulltear and I was going to tack them to the bottom of the pan. Maybe I should build a frame that holds the slat holders so I can remove them from the pan if needed.
Steve

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Re: New member, sweet find at the auction, and a massive gantry

Postby tnbndr » Thu Apr 28, 2016 9:01 am

Make sure to stagger the middle holder so the slats have a bow in them to stiffen them up and keep them from rocking or moving.
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Re: New member, sweet find at the auction, and a massive gantry

Postby Nacs Fab » Thu Apr 28, 2016 11:28 am

Looking good Steve. I would most definitely consider making a slat holder that allows removal of them easier than having them tacked in place. Slats are a "Consumable" and I constantly find myself moving them around as they get used up. I cut 80% of my cutting on the front 4' of my 4x8 table, so sometimes I move slats from the "back half", simply because it is easy to move them around as needed to keep the wear in check. I also am an advocate of having symmetrical slats - meaning, none of them cut specifically to fit the table. Mine are sheared 2" tall slats and I can burn on the top side for a while, then when they start showing wear, i flip them upside down and have a brand new surface to cut on. Also one of the single most amazingly simple tricks I learned here on PS is I installed a $30 sheet of flat expanded metal on top my slats, saving from tip-ups and the nagging pain of babysitting my machine while it cuts. I am still on my original piece of expanded metal after cutting 12 sheets fo 14 gauge with a ton of detail. Best investment to date!
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Re: New member, sweet find at the auction, and a massive gantry

Postby BTA Plasma » Thu Apr 28, 2016 4:12 pm

Simko wrote:
acourtjester wrote:The last water table ( for a 4X8) I welded up had some warps in it but I had a separate slat grate. That with the water weight held it flat when filled. It was 18 Ga metal. Try a test fill and see what happens.


That could be a good idea. I made slat holders like Bulltear and I was going to tack them to the bottom of the pan. Maybe I should build a frame that holds the slat holders so I can remove them from the pan if needed.


8-) Good idea! We weld them in every 22 inches with a 2" bead. Slat holders should be low enough not to be consumed by the plasma beam.

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Re: New member, sweet find at the auction, and a massive gantry

Postby SeanP » Thu Apr 28, 2016 6:16 pm

My tray was only 2mm with 2 joining welds, tried to keep it flat, but failed, so ended up just bolting it down to the frame with stainless pan head bolts and a coating of stixall, it's been fine and would do again no bother, I was trying to take out the bows to get all the water to drain out to the centre section, I'm still not sure what's the best route to take, I'm sure just a flat tray like you have will drain just as well.
The centre angle in mine just sits on the tray, but I do have a frame below as well, it's useful when cleaning out.
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Re: New member, sweet find at the auction, and a massive gantry

Postby muzza » Thu Apr 28, 2016 10:07 pm

I too have separate slat holders on my tables to make it quick and easy to change slats. The main table I turn the slats over or change them out about every 8 to 10 weeks but we generally cut about 80 sheets per month or more.
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Tue Feb 21, 2017 8:53 pm

Hello everyone! I'm glad to be back. I had to take a 'short' hiatus because of the new baby and a new job, but now that I got my feet back under me, I am ready to get back into this project.

The last time that I was here, the 'Fire Pit' thread was in full drama swing. I'll have to do some searching to see how that ended (or maybe I should just leave it alone, LOL)

I still have to weld in the slat holders, do some painting, and order the plasma cutter. I am going to have to do some searching to refresh myself on what options I need to buy with the PM85 and where to get the best price on it.

Looks like my membership expired... I'm going to have to get that renewed also.

Anyways, I look forward to getting this table finally making some sparks!

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Re: New member, sweet find at the auction, and a massive gantry

Postby acourtjester » Tue Feb 21, 2017 10:18 pm

Welcome back I bought 2 pm 65s from Welders Source happy with the price and shipping service.
They come with a small set of consumables, but None of the lower amp nozzles so add some Fine cut and 45 amp 65 amp, "O" rings and Silicone.
Nozzles come in 5 packs.

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Re: New member, sweet find at the auction, and a massive gantry

Postby exapprentice » Wed Feb 22, 2017 4:44 am

Hi Steve

Welcome Back

Good to know all is getting under control it must be worse than juggling trying to keep everyone happy ;)

looking forward to some interesting posts like you say things have moved on since you were last here :shock:
Take time to catch up and I am sure we will all help when you need it :D
Best Regards to all
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Mon Mar 13, 2017 10:03 pm

Hypertherm PM85 should be delivered to the local weld shop on Thursday for pickup with hand and machine torches 8-)

I still have a lot of work that needs done to be ready to cut anytime soon....

The 100A feed is run to the plasma / weld area. One disconnect will be fused for the table and the other one will be fused lower for the welders. Not to be used at the same time :lol: still need to install weld outlets.

IMG_3007.JPG


I primed the table, but still have to get a final coat of color on it. Then I have to put the gantry back on, slide the water tray on, paint inside the tray, and install the slats.

IMG_3008.JPG


The last step will be to put some sort of drain and barrel system together to keep the water under the table when not in use. I am not sure how well the flat pan is going to work for this, I'll put a slight slope to the table to try to get it to drain out. I guess we'll see how good/bad it does. I have a feeling that I will be cutting the bottom of the tray out at some point and making a downdraft system for it.

Thanks everyone for all of the help over the last year. I wouldn't have been able to do it without you!

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Re: New member, sweet find at the auction, and a massive gantry

Postby BTA Plasma » Tue Mar 14, 2017 9:09 am

Keeps getting nicer looking. :geek:

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Re: New member, sweet find at the auction, and a massive gantry

Postby racerx1194 » Tue May 23, 2017 9:46 am

nice looking machine right there

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Re: New member, sweet find at the auction, and a massive gantry

Postby _Ogre » Tue May 23, 2017 11:19 am

congrats on a new baby!

is there any way to drain your water tray? it's sort of important to be able to drain
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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Tue May 23, 2017 11:22 am

Thanks!

Here is what it looks like now. 8-)

IMG_4239.JPG


IMG_4243.JPG

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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Tue May 23, 2017 11:27 am

:ugeek:
_Ogre wrote:congrats on a new baby!

is there any way to drain your water tray? it's sort of important to be able to drain


I put a drain on the side of the pan for now. It is not ideal, but by setting the table slightly off of level, it drains nearly all the liquid except for maybe a gallon or so into a drum setup (Thanks go out to whoever it was that I got the idea from for the drums on this site)

I am using GreenCut plasma cutting fluid right now and so far I really like it.

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Re: New member, sweet find at the auction, and a massive gantry

Postby Simko » Tue May 23, 2017 11:34 am

I made up a goofy regulator contraption to allow me to fill the table in a controlled manner. Setting the air to around 6 psi pushes the fluid from the drums and fills the table in about 3 mins.

I'll get a picture of the setup if anyone is interested.
Steve

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Re: New member, sweet find at the auction, and a massive gantry

Postby _Ogre » Wed May 24, 2017 11:50 am

Simko wrote: (Thanks go out to whoever it was that I got the idea from for the drums on this site)

your welcome :mrgreen: :mrgreen: :mrgreen:

i have a 3 way valve with a low pressure regulator set at 6psi also
with the 3 way valve up is fill, down vents the air from the barrels

other than plain water we add washing powder to the water to keep rust at bay
worked well for 5 years and costs us $5 every time we clean out the table

even with a bottom drain we still have a gallon of water in the tray
sounds like you're good :D
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