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Tools / Re: Making Simple QC Tool Holders
« Last post by vtsteam on July 17, 2017, 10:31:24 PM »
Thanks John!  :beer: I kind of forgot about this thread, and have to admit, I enjoyed re-reading it again myself even though I was trying to fix it. I forget all the stuff I did. Reading it brings back the old enjoyment and anticipation of making those tools I now just take for granted.

With lathes, rigidity is everything. That's why I started the new one, and I'm hoping to use the Rose style toolholders -- from some old ME issues. Might cast a Tubal Caine "Gibraltar" toolholder in iron, too. If I get back to iron casting again.
Tools / Re: Making Simple QC Tool Holders
« Last post by SwarfnStuff on July 17, 2017, 09:25:34 PM »
Hi vtsteam,
         Just re-read this post whilst on referee duties with my teen age grandchildren as mum and dad are at work. (Last two days of school hols.) Actually they are pretty good kids who do though enjoy niggling one another at times, hence the "referee".
         Your comment regarding tool slipping down with button head screw is actually cited as a safety thing by Eccentric Engineering. Better to have tool slip rater than break or worse, dig into and ruin the job.
        Regarding interrupted cuts the same applies but in my case with my 7X it is more tool deflection with gibs adjusted as tight a I can whilst still being able to move cross slide etc. I'm thinking of removing the compound and fitting a solid riser in a way that will allow easy refit if I need the compound. I'm not sure that it is the compound or just the lack of general rigidity of my Seig clone although bolted to a lump of 12mm steel plate.
          It is good to go back and re-read posts even if it was you having to do some editing due to PB issues.
John B
CNC / Re: DDCSV1.1 4 Axis controller
« Last post by blades on July 17, 2017, 08:34:26 PM »
Hey Rob, I truly appreciate any help at all!
The motors are pretty basic, standard NEMA 23 motors. 1.8 deg/step.
I'm not sure of the actual PD of the pulleys, but it's a 1:1 belt drive with 20-tooth pulleys on a 3mm pitch belt, to a 12 TPI lead screw (basically a 1:1 drive to the lead screw). The driver is set up with no microstepping.

The X & Y run on 20-tooth pulleys on a 3mm pitch belt. They work perfectly fine.

I also tested a different motor when I had the G540 hooked up, and got identical results, so it's not a motor issue.
CNC / Re: DDCSV1.1 4 Axis controller
« Last post by PPRINT on July 17, 2017, 08:15:44 PM »
Bill, I'm sorry the control setup is giving you fits.  This sort of thing stresses me to no end so I am empathetic to those going through it.

I'm not sure if I will be able to do anything to help you, but with some basic information I might be able to come up with some things that might point you in the right direction.

I'm a ground level sort of guy, so I have to start at square one when I solve problems with my projects.  Can you post the step angle of the motors you are using , the pitch diameter of your pulleys, and the pitch of your z-axis screw please.


Project Logs / Re: Centurion now 4 in 1!
« Last post by Brass_Machine on July 17, 2017, 06:18:25 PM »
Nice job!
Project Logs / Re: Heart Transplant for a 3 in 1 machine
« Last post by dvbydt on July 17, 2017, 05:47:21 PM »
Now a 4 in 1, see my latest post.

Project Logs / Centurion now 4 in 1!
« Last post by dvbydt on July 17, 2017, 05:45:29 PM »
My little anvil has been without a suitable mounting stump for some time. A friend donated a perfectly sized one but one of the end faces was out of square. Rather than mounting it on a faceplate and facing the end, I clamped it to the lathe bed and used the tailstock centre to hold it firmly.
With the column clamps loose and a fly cutter in the collet chuck,  the Centurion becomes a swing arm router! A few passes and jiggling about an I had a fairly flat, square face. Four long 10mm  coach screws were used to mount the 150mm long rail section.
I use it on a concrete floor, not the table in the photo. It is more convenient and has a nice ring to it,  much better than the "dong" from the flat face on the back of my vice (vise).

CNC / Re: DDCSV1.1 4 Axis controller
« Last post by blades on July 17, 2017, 05:30:58 PM »
Ok, I'm about ready to take a hammer to this controller! Per my previous post, I was having trouble with my configuration because my G540 runs in 10x microstepping by default, and cannot be changed. This forced my to use a Z step setting number of 24,000 steps-per-inch (I'm running, or trying to run in inch mode). Max setting is supposed to be not over 10,000. At this setting, my Z-axis just hummed in program running mode, such as when trying to home. When I set this down to a lower number (12,000), it worked perfectly other than being off by 50%. So, I replaced the G540 with some TB6600 motor drivers where I can set microstepping. It was working perfect again on X & Y. I now have Z step setting @ 2400 with the new motor driver (no microstepping), and it's doing the same thing again! Motor won't even move in manual mode unless I drop the Z number to something well below the 2400 I need it to be.
It didn't like 24,000 with the G540, and now it doesn't like 2400 with the TB6600 drivers! There is nothing wrong mechanically with the Z axis, it runs very smooth when I set an artificially low step number.

Project Logs / Schaublin 102 is making chips!
« Last post by thecogwheel on July 17, 2017, 04:46:38 PM »
This week I finally managed to get the 102 making chips (somebody on this board needs to invent a time machine!).  It took some work mostly in the drive area.  I didnít have access to the proper voltage to drive the existing motor so I decided to replace the original Schaublin motor with new 3/4 HP Baldor that I picked up a year ago for $50.  I also wanted to keep the mechanical variable speed drive working.  I could have got the old motor rewound, and I might do that some day, but the $800 that I was quoted was a bit rich.

After modelling up the existing motor in Fusion I designed up a pulley to fit the Baldor, spacers to place the new motor in the same location as the old one and a motor mounting plate.  I used old school methods to make up a plate to mount the VFD and associated electrical components.

I made a montage type video of all the work:

<a href="" target="_blank"></a>

Here is the direct link:

Did some initial cutting with it (really sketchy tooling setup!):

Pretty excited to have a working Schaublin in the shop!
Project Logs / Re: New Tractor Shed
« Last post by awemawson on July 17, 2017, 03:48:56 PM »
We started at the Woodwork Shed, enlarging the existing 100 mm flexible conduit hole to 110 mm to take standard drain pipe, then trenching to what will be inside the Tractor Shed, terminating in a long radius bend upstand.

Then we trenched across the shed at an angle to aim for where ongoing water and electrical connections need to be coupled. This duct again starts with a long radius bend upstand, crosses the shed to a 'swept Tee' with an upstand, then continues to a manhole being used as a marshalling point. The electrical duct to the Electrical Distribution Point had to be extended, hence the 3D printed joiner, and the manhole body was suitable bedded on dry mix before all was back filled.

It then just remained to excavate for the last concrete pad that was omitted when the Volumetric Truck ran out of concrete - 2.5 Jumbo bags of ballast so a generous cubic metre of concrete.

Darren will return tomorrow after haymaking to shift all the hardcore onto site and start crushing it down.
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