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Poor Man's Digital Dentist Core XY build

Posted by Qdeathstar 
Re: Poor Man's Digital Dentist Core XY build
August 10, 2017 09:52AM
I wouldnt do it any other way I like the solution, I also proposed a similar thing in one of my designs, but it was a double ended stepper & 2 shafts. Because the shaft is keyed I suppose that also helps as the shaft need not touch as long as the key engages.

Edited 3 time(s). Last edit at 08/11/2017 06:33AM by MechaBits.
Re: Poor Man's Digital Dentist Core XY build
August 12, 2017 06:06PM






Finally got the mill home and in place. I still have a lot of set up to do. I need to extend an existing 20amp 240v circuit so I can power the thing... and need to install the digital read out.

The mill and stand weighs around 1000lbs winking smiley.
Re: Poor Man's Digital Dentist Core XY build
August 16, 2017 09:29PM
Was recently watching some Mill video's started to see the Grizzly thought ohh nice another we cant get in the UK, then I saw some bady YT reviews, will be interesting to see how you get on with it. Did you grab a bargin?
Re: Poor Man's Digital Dentist Core XY build
August 17, 2017 04:49AM
there are some people who won't accept less than a full sized knee mill from bridgeport or one of the other non-chinese companies. Im not an expert, but judging from what i've done thus far it's a capable machine. I mean, yeah, if you got room and money for a bridgeport go for it. A working bridgeport goes for around 4500 without tooling, and you need some heavy equipment to move it in to a newly built garage, because the one you have won't the adequate in terms of size csmiling smiley
Re: Poor Man's Digital Dentist Core XY build
August 18, 2017 09:03PM
they certainly look capable enough, is it manual on both x&y, any plans to upgrade, was it less than 2k? looks like spanking new one smiling smiley
Re: Poor Man's Digital Dentist Core XY build
August 19, 2017 08:53AM
It has power feed on the x-axis, I plan to add power downfeed on the head (not the spindle), I am currently working on installing dro. I don't think milling is very popular around here, there was nothing for sale except rust-bucket machines locally, though I expect that may have to do with the fact that most of the population is transient ( 4 larger military bases within 20 miles of me) and the fact that we live in a marine environment... I paid about $2700 for the machine. Add $1000 for tooling, $1000 for the dro (though I wish I had of gotten a nice set of magnetic dros instead of glass bead, looks a little easier to set up, and cheaper).

I already had a major screw up on it, I was using an endmill and for some reason I thought you could take cuts of any depth with an endmill (but you cannot) and ended up sliding the 100lb vice down the table, apparently I did not have the vice right enough, then the endmill stopped spinning because it got binded up in the material.. luckily I didn't have the end mill installed correctly in the collet so the collect kept spinnng, chewing up the end mill instead of the gearing on the machine. I'm starting a machine shop class at my community college next week smiling smiley

Once I get the dro installed I'll take some more pics, sadly I've only had a few hours to play with it over the past week because of work, and those weekend I'm going to see the eclipse...

Edited 2 time(s). Last edit at 08/19/2017 08:56AM by Qdeathstar.
Re: Poor Man's Digital Dentist Core XY build
August 20, 2017 12:56AM
Cool look forward to seeing some stuff from it, Have you seen the laser hole finder attachment, seems like a good device to make with 3D Printer, for mill.
Re: Poor Man's Digital Dentist Core XY build
September 07, 2017 03:48PM
that is a nice setup... how mich was the lathe?
Re: Poor Man's Digital Dentist Core XY build
September 10, 2017 02:37PM
Around 1900 €, but I think it is much cheaper in US (I think the equivalent is Grizzly 10x22). And you get more toys with it in the smaller price sad smiley
Re: Poor Man's Digital Dentist Core XY build
September 13, 2017 09:31AM
Found this thread of a guy reworking hiz Grizz [www.cnczone.com]
I really want to get back into milling stuff but when you see the amount of extra work you might have to get involved with,
3D printings a breeze by comparison.
Re: Poor Man's Digital Dentist Core XY build
September 13, 2017 08:47PM
he is turning a milling machine into a cnc machine...
Re: Poor Man's Digital Dentist Core XY build
September 18, 2017 04:28AM
Yes I know...

On the subject of 3D printing being a breeze compared to milling, I had a dig around in the settings of cura the other night as I was thinking of trying some of the new stuff in it, but when I saw the amount of stuff I needed to configure...I thought nah,.. another time...
So 3d Printing obviously has enough depth & complexity if you want it, but you dont need as many extra tools jig's & stuff needed for milling, so that what i meant.
Re: Poor Man's Digital Dentist Core XY build
September 19, 2017 08:07AM
In 3D printing the mistakes are cheap, unless you have $$$ printer or $$$ materials (i.e no Statasys). Milling and lathing are expensive as I've recently discovered: money for tools, money for materials, lots of non-idle time spent and a huge mess to clean up.
Re: Poor Man's Digital Dentist Core XY build
September 19, 2017 08:39AM
and with me moaning about the price of cheap filament, you might have guessed there was no magic money tree in my back garden(what am i saying I dont even have a back garden & shed), thats why I dream of something compact & bijou to do small parts without much extra tooling, with a tiny endmill bit(I bet the cost on them mounts up)...who cares if it takes a few hours...something bigger needs so much more resources including the space for it & the time to devote to it, i'll be happy to just get one in the community to use, .

Poor Mans Digital Dentist just spent a few bob & has the space for it, can't be that poor, or the Dentist is extremely rich.

Edited 2 time(s). Last edit at 09/20/2017 07:55AM by MechaBits.
Re: Poor Man's Digital Dentist Core XY build
October 22, 2017 01:36PM
Here is an update



This is the mount for the idler pulleys. I was using printed abs but after a month of tension in the belt the abs want really holding up, plus, i had to use long screws because the abs was thick...




A view from underneath, showing some pocketed fasteners.



This is the base of the motor mounts. The slots are to allow sideways adjustment of the motor, so that i can keep the belts parallel and at 90 degrees. I will cut slots in the aluminum tubing to tension the belts.



Just another view from the underside...




I really enjoy milling, got a lot to learn but there is something satisfying about shaping metal into something,


Got a few pictures of the mill set up with dro as well. A lot of chips..

I think ebay. is the best bed to get tooling, I got some nice end mills that are much higher quality than the grizzly set i bought for about half the price.... i want to get a corner-radius end mill set and maybe a face cutting end mill asap, but maybe after i get my small lathe.








Edited 1 time(s). Last edit at 10/22/2017 01:50PM by Qdeathstar.
Re: Poor Man's Digital Dentist Core XY build
October 23, 2017 01:23AM
Those bellows on the linear guides are definitely worth it. I've noticed it on my bare mgn12 rails too sad smiley
Maybe the shapeoko-v-wheels version has an advantage there?
I'm thinking of adding a "curtain" around my spindle, allowing me to attach a vacuum cleaner hose right where the chips come from.
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