Building My First CNC Router, Looking for Advice & Other Info

[Desertboy]

So i adjusted some of the components of the Z Axis to hopefully improve how rigid it is, previously that blocks that connect the Spindle Mount to the Linear Carriages were shorter than the Spindle Mount, in order to try and maximise Axis Travel, however in reality this meant that the spindle could reach well below the bed even without a tool in the collet, so i decided to make the Connection Blocks longer and increase the spacing of the Carriages.




I started looking today about how i need to properly Ground the Spindle at the VFD side, whilst looking for information i came accross a forum post on CNCZone that said many of the Chinese spindles do not have their Ground pins connected to anything inside the Spindle, so i decided to take the top off and have a look - and not much of a surprise as the Ground pin was not connected to anything. Where can i connect this to? Should i just drill and tap a hole so that a connector can be screwed to the casing and soldered the correct pin?



I've also been scouring the net today trying to find some nice proximity sensors to be used as limit switches, i think the DDSCV1.1 can use 12v limit switches? Could be wrong any advice would be appreciated.

Also waiting for the Cable Drags and breakout boards to arrive so i can design some brackets and a portable enclosure for the controller.

Also been searching for the correct resin to fill the extrusions with, anyone have any personal experience / recommendations?

Thanks

Alex

Nice one both you and Clive tested my spindle today with an ammeter and it's obviously pin 4 is not connected to anything ;)

Will do as Clive suggested, were the top bolts hard to undo? I tried and felt some resistance like I have some loctite to break didn't want to push it until I asked had a nightmare rounding off A2's next time I build I will only use A2's were needed and stick to proper bolts if appropriate.

[Nr1madman]

Great build!
Fast going and looking good.
I know nothing about the strength of 3d printed parts but are they strong enough to hold the bearings on your long axis?

The printed parts that hold the bk/bf bearings are also subject to big loads... but as I said.. they might be up for it? ;)

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[AlexDoran]

Great build!
Fast going and looking good.
I know nothing about the strength of 3d printed parts but are they strong enough to hold the bearings on your long axis?

The printed parts that hold the bk/bf bearings are also subject to big loads... but as I said.. they might be up for it? ;)

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Hi there,

Thanks! I am only using 3D Printed Parts to dry assemble the machine. Once i am happy with how everything fits they will be replaced with aluminium :)

Thanks

Alex

[Nr1madman]

Hi there,

Thanks! I am only using 3D Printed Parts to dry assemble the machine. Once i am happy with how everything fits they will be replaced with aluminium :)

Thanks

Alex

Now I'm truly envious!
What an fantastic way to build...

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[AlexDoran]

Now I'm truly envious!
What an fantastic way to build...

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The 3D Printed Parts are only 25% Solid, even so they are fairly tough and rigid - i'm sure you could print them much stronger than they already are (Increase the Wall Thickness and Infil % ). However it will never offer what Aluminium will. Great and very cheap / fast way to prototype!

Alex

[AlexDoran]

So i pretty much finished the wiring, and ran the coolant lines for the spindle, tried to semi tidy the cables & pipes.

I started working on getting the Limit / Home switches working but i have been an idiot and bought the wrong type of probes, the DDCSV expects a 12v signal from the probe, but mine are NPN and not PNP so i am pretty sure these are not going to work directly with the controller, bit of a pain considering i already soldered them to the longer cables etc, now i need to try and source some PNP variants that are the same size, and dont cost £40 each.

I also wired the VFD to the controller, however when i try to run the spindle, the display on the VFD changes but nothing actually on the spindle, not sure if i have it configured properly, followed a youtube video, but also read a DIY guide that had conflicting information about some of the Hertz values, also i am trying to signal VFD from the DDCSV using the 10v pwm signal, i had the control parameters (PD001 & PD002) on the VFD set to 1 but i think this needs to be 2.

Any advice or help on any of these points would be greatly appreciated.






Alex

[Nr1madman]

Wait a minute here... You got manuals for your stuff??? :D

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[Neale]

You can find the HY manual from a pointer here - just scroll down from the top.

[AlexDoran]

Wait a minute here... You got manuals for your stuff??? :D

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Haha yep, which was pretty good actually to be fair to them, just lacked that precious bit of Data that i desperately needed :P

[AlexDoran]

Well guys it may not look like much, but it was a fair amount of working getting to this point:



My Solidworks package updated to 2018 in the last few days, 2018 Professional now comes included with Solidworks CAM - Which is essentially CAMWorks. I spent a lot of time yesterday and today wrapping my head around creating a Post Processor for the DDCSV1.1 to use with CAMWorks, setting up the machine and figuring out tool creation in CAMWorks etc.

As far as CAMWorks goes its a fantastic bit of software, i can just stay in Solidworks and open up the tab, click a button to recognise machinable features and then go from there, once i enter a few more tools into the Machine that are available to use, it will pick out the most suitable tool for the job and generate the tool paths. After this you can visualise them and make any changes etc.

Still need to make some changes to the Post Processor and CAMWorks settings to streamline the whole process but so far its no where near as challenging as i thought it would be.

Now i need to figure out and start researching good ways to reference origins on the machine, i see a lot of people work to the centre of parts, need to do some research on this.

Also looking to get a probe and figure that out with DDCSV1.1.

Thanks

Alex