[grg_p]

I'm going to build 4'x 10' cnc router. I want to make the table height adjustable. The table needs to be 6' long most of the time so the end has to fold down. And I would like to have a 12" X 48" vise on one end. I'm new to this so go easy on me.
Thanks

[ger21]

Are you asking any questions?

[grg_p]

I'm going to cut the table out of aluminum to make the adjustable table 4' X 5' so I can get the size to start cutting my stainless tubing. I will have to make a jig to drill screw spline in aluminum then will weld joint after bolting. At this time I' m not into it far enough to ask questions but I'm sure it won't be long.
Thanks

[wizard]

Did you win the lottery or do you have another reason to use stainless steel for the machine structure? I hope you realize that working with stainless is very difficult compared to regular structural steel.

[awerby]

Could you share a drawing showing how the end of the table is somehow going to be able to fold out of the way and extend when needed? I'm having a hard time picturing this, given that none of the machines I've ever seen could do it.

[grg_p]

I'm using stainless from the salvage equipment at the company I worked at. We only used stainless so I have been saving materials for about three years before I retired. When they scraped equipment I salvage as much as I could get my hands on. I was able to cut and build the 8020 aluminum table now I need to start the adjustable legs. I have a 10' stainless threaded shaft from one of are freezers that was damaged but will work fine for adjustable legs. At this time I don't have any drawings but I will try and post some pictures if I can figure out how to do it.
Thanks

[grg_p]

I found 12v gear motor and power supply on eBay to drive my legs up and down. I also picked up 24" absolute scale so I can monitor height when running up and down. I have used v bearings and rails from our robot rebuilds that I will use for vertical guides. I want to make wheels to roll around in shop and screw down legs when it's parked. I will be doing a lot of lathe work today on leg screws and screw down stops hope to have a picture or two tonight.
Thanks

[grg_p]

Attachment 301428Attachment 301428Attachment 301430Attachment 301432

[grg_p]

I'm about done with vise and most of welding on table. I will try and post some more pictures. I don't know why they are upside down.
ThanksAttachment 301880Attachment 301882Attachment 301884

[awerby]

Are you driving the screws with roller chain?

[grg_p]

Yes the vise screws I'm using #25 and table #35 roller chain.
Thanks

[ger21]

You've got to get the pictures rotated. Looks cool, but very hard to look at.

[grg_p]

I'm using my IPad to take the pictures and they look fine when I view them. I'll try rotating when I take them and see if that works. When you click on icon at the bottom of the post window they are right side up. Guess that's why I never got past the third grade.

[grg_p]

I'll try this again
Attachment 301932

[grg_p]

I finished bearing guides for the table and my linear actuators arrive so I can work on table extention today. Then I will cover top with aluminum extrusions. The table will lower about 12" but I'm not sure if the play in the leg screws will be a problem. I'm hoping the weight of the table will hold it down or I'll have to deal with that.Attachment 302242Attachment 302242

[awerby]

Once you've got this thing built, I doubt it will float away. Congratulations on getting the pictures right-side up! So the roller chains power the up/down motion of the table legs? And the linear actuators push the end of the table out?

[grg_p]

Yes the 12v gear motor is geared 60:1 so with 200 pounds on the table it doesn't even slow down. I used the same motor on my drill press table and loved it. Put a PWM control on to regulate the speed.

[grg_p]

Got Vee bearings guides mounted on to the table. Can start on to the folding table end actuators.Attachment 302470Attachment 302472Attachment 302474Attachment 302476

[grg_p]

When covering the top with 80 20 3"X.75" is it better to leave gapes between extrusions or but up tight? I was thinking that you could bolt thru gapes if need be or is that not an issue?
Thanks

[grg_p]

Working on folding table end.Attachment 302950Attachment 302950Attachment 302950