Author Topic: surface grindy type project (Read 41416 times)

shipto · « **Reply #25 on:** April 12, 2014, 06:10:00 PM »

I really like that idea pekkanf and think thats probably the way I will go. as for the up?down hill climb I am going to use a mechanical method so it should be solid enough to cope, soon all will become clear.

Today I started by taking a car cam belt idler and removing the outer bit and remaking it so it fitted into the center of a flywheel this will have the variable mechanism to move the table left and right. Then I made the shaft to drive it and started the housing for this, the picture for this i will post tomorrow.

shipto · « **Reply #26 on:** April 13, 2014, 05:06:53 PM »

Well did most of the housing today just need to clean it up for the sake of looks (not that it will be seen now i think about it, it will be covered by a guard). Only had a small amount of stock so the bearings are not totally enclosed but this will not matter the housing is merely holding them straight they will be held in place by the shaft itself.

shipto · « **Reply #27 on:** May 01, 2014, 05:23:03 PM »

Progress has been slowed due to working on getting a vw campervan to mot standard but I have been working on getting the left to right mechanism going and so far have done the top pivot and bottom slide. The bar I currently have connecting them is a bit of extruded aluminium which may not be man enough and need changing but I will see.

vtsteam · « **Reply #28 on:** May 15, 2014, 08:49:09 PM »

I've been enjoying reading this project!

shipto · « **Reply #29 on:** May 16, 2014, 07:10:01 PM »

Quote from: vtsteam on May 15, 2014, 08:49:09 PM

I've been enjoying reading this project!

Thanks.
It is still ongoing but at a slower rate as other things must take priority while the weathers good

. I did however mock up the drive for the left to right motion and decided it wasnt geared down enough so I am working on putting another level to further slow it down. Havent taken any pics as its not finished yet but maybe before the weekend is over.

shipto · « **Reply #30 on:** June 16, 2014, 05:22:38 PM »

I decided to take a break from the chores I have to do on sunday and get some work done on the left/right drive

I think it should be about right now but if I need a bit slower I can increase the size of the larger v-belt pulley.

shipto · « **Reply #31 on:** June 20, 2014, 05:10:52 PM »

so I have decided I do need a bigger pulley mocked it up today to see it running.

the video makes it sound a lot noisier than it really is but the squeak once per cycle is the belt slipping slightly when it has to stop the carriage and reverse it, hopefully higher gearing will solve this. The bar you see is only a temp when I am happy I will get some rod ends.

vtsteam · « **Reply #32 on:** June 20, 2014, 10:10:43 PM »

Cool!

Jonfb64 · « **Reply #33 on:** June 21, 2014, 04:10:44 AM »

Supper

i love the shaper type movement must get back to to building my gingery shaper.

jon

shipto · « **Reply #34 on:** July 05, 2014, 11:39:19 AM »

changed out the pulley and its way more managable now so just for fun I decided to do a little test

mattinker · « **Reply #35 on:** July 05, 2014, 11:47:01 AM »

That's fun! Looking good!

Regards, Matthew

PekkaNF · « **Reply #36 on:** July 05, 2014, 03:15:54 PM »

Very nice!

When you'll have tested and adjusted it would you publish a bit of info how flat surface it produces. It looks pretty good.

Pekka

shipto · « **Reply #37 on:** July 08, 2014, 08:29:37 AM »

I will do my best but I don't have much equipment to measure it accurately the best I could do would be to lay some paint on the granite chopping board I nicked of the wife and show the results of that.

shipto · « **Reply #38 on:** July 08, 2014, 03:49:39 PM »

I am fairly happy with the left/right movement now and its time to turn my thoughts to the back/forward which for the sake of less typing I will now call X and Y.
I have stripped down a old 9.6V drill a friend gave me and salvaged the motor and gearbox. Then I stripp down the gearbox and sawed the shaft shorter before facing it off, drilling and tapping the center for a m6 screw.
Next I made the mount for it from a block of aluminium, still have to drill and tap the block to mount it on machine but will do that after I work out the rest of the mechanism.

shipto · « **Reply #39 on:** July 10, 2014, 03:38:49 PM »

Had to gather together some of the bits I threw away as I forgot to take the torque limiter mechanism into account, I could have just locked the mechanism but thought if I could find the bits it would be a handy function. So found them and installed them, then mounted the setup on the table.
Only problem now is that I am getting a bit fixated on this and am neglecting to do the jobs I should be doing, example I have had a replacement wheel arch for the camper for nearly a month now and not got it on the vehicle yet oh well

Stilldrillin · « **Reply #40 on:** July 11, 2014, 02:10:06 AM »

It's great to see some animation!

I've been puzzling/ following. But have had nothing to add......

Looking/ sounding good. Well done!

David D

DavidA · « **Reply #41 on:** July 11, 2014, 04:42:14 AM »

Shipto,

... do you think the bloody cv's would split from the shafts ...

The reasoning here is that a split cv boot will throw out all the grease and this could cause the joint to dry out and size up.

Would you want a drive shaft to suddenly start thrashing about when you are driving along ?

Interestingly, it is only the outer boots that the tester is worried about.

Dave.

shipto · « **Reply #42 on:** July 11, 2014, 03:23:32 PM »

Quote from: DavidA on July 11, 2014, 04:42:14 AM

Shipto,

... do you think the bloody cv's would split from the shafts ...

The reasoning here is that a split cv boot will throw out all the grease and this could cause the joint to dry out and size up.

Would you want a drive shaft to suddenly start thrashing about when you are driving along ?

Interestingly, it is only the outer boots that the tester is worried about.

Dave.

Had to look back to see what i had said here, I wasnt questioning the reason for cv boots failing but commenting that I couldnt get the cv split fron the shaft to replace the boot, didnt go into much deatil because its not a car forum but i ended up having to take the shaft completely out and stripping the other side to get them on.

shipto · « **Reply #43 on:** July 12, 2014, 04:29:29 PM »

No major progress today just added the block for the screw.

nel2lar · « **Reply #44 on:** July 13, 2014, 10:18:29 PM »

Shipto
I have a chain set up that moves to the right then turns and goes to the left. I can kind of draw up something if you would like to see it. I found the mechanics when I tore down a ink tray mixer on a printing press. It's not anything hard and could possibly be able to set the two point on reverse direction to what you want. Let me know and I will try to make a sketch.
Nelson Collar

Manxmodder · « **Reply #45 on:** July 14, 2014, 06:52:23 AM »

Shipto, just watched the video.I love a good contraption,and this is a wonderful contraption

......OZ.

shipto · « **Reply #46 on:** July 14, 2014, 05:03:45 PM »

Thank you nelson I would be interested to see what you have and thank you manxmodder the contraption should be ready to be brought into full operation pretty soon. I am talking to a guy about controlling that Y axis and he may be able to donate a surplus to requirement plc for me to play with

tom osselton · « **Reply #47 on:** July 14, 2014, 05:40:19 PM »

I'd just use a starwheel on a threaded shaft every time it passes over the wheel it advances by how many pins turn the rod.

tom osselton · « **Reply #48 on:** July 14, 2014, 10:07:48 PM »

something like this principal

It would not be hard to setup on a table with setable reversing switches to control travel and the feed rate would just be set by the number of cogs and the pitch of the thread. The table going back and forth for two passes would advance it one step sideways the cogs would have to have a ratchet effect also.

shipto · « **Reply #49 on:** July 15, 2014, 12:40:19 PM »

I was thinking of a mechanical solution at first tom but after much thinking I decided this was by far the easiest way to do this part of the build, didnt expect to have a pcl to play with though was thinking arduino would be used (may still use arduino as I have never used a pcl before and not sure about programming it)

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Author Topic: surface grindy type project (Read 41416 times)