PM 727M CNC Electronics Mounting

[@NikitaLab]

one of the most well executed cnc electronics cabinet builds I've seen, well done!

[@CNC4XR7]

Thank you!

[@robertcarr5846]

Sam.I ordered one of the cabinets and got it today, great box for the moneyThanks for the link.

[@CNC4XR7]

+Robert Carr Your welcome, Yes a very good deal after seeing what all is available.

[@EZ_shop]

It's starting to look like a Tormach cabinet, Sam. Awesome!

[@CNC4XR7]

+Crivo152 Yea it sure does lets hope it operates that way as well EEEKKKK!

[@RaptorMachineToolCo]

super nice job on that board !!!

[@CNC4XR7]

Thank you!

[@russtuff]

Right on! Man that looks so organized and awesome.

[@CNC4XR7]

+russtuff Thanks Rus, Yea shes shaping up fairly well If I didn't have to rethink everything as I went it would go a little smoother. But that's the way it goes. Be Safe, Sam

[@BrianFyhnPetersen]

Nice cabinet. As a suggestion for the fan hole, I would have made a cheap investment in a hole saw, that makes a nice round hole in less than a minute. Cheers, Brian.

[@CNC4XR7]

Yea sometimes I'm too cheap I just figured buying a hole saw for a 3" hole that I may never use again was a waste. But it would have been faster for sure. Thanks.

[@ericbeckers2673]

great work, you give me inspiration for my own mill conversion. keep going.

[@CNC4XR7]

+Eric Beckers Thanks Eric, It's not to difficult if you take it one step at a time. Be Safe, Sam

[@bittalmundra1642]

you did fantastic work . I very much like your videos .

[@CNC4XR7]

Thank you! I happy your enjoying the video's Be Safe Sam

[@craigsmachineshop2040]

Great idea on using an endmill in the dremel! I will have to try that.

[@CNC4XR7]

It's a little jerky and extreme care should be taken but if you go slow it works. Be safe Sam

[@Somun-a]

Coming along nicely. For the fan, I would be concerned about metal chips getting in through the grill. A mesh of some sort would help keep them out.

[@CNC4XR7]

+aspartns Thanks it ended up in the front bottom I installed a filter media That should keep any debris out. Be Safe, Sam

[@ChristopherJones16]

So the tri-power power supply is just for your PDB which needs 12V.. and you also have a 48V power supply to power the steppers, drivers, and the controller is that correct? How many amps does the power supply need to be to power the three motors which im guessing are around 3A each ? I think I saw your International Power display on the panel that 48V will fetch 10A under full load so is that enough to power all three motors, controller, drivers, and the fans?

[@CNC4XR7]

Tri Power is for Control power. The Steppers are 5 amps

[@dimasleite1646]

Hi! If possible you could save the electric diagram with the Tinycad extension, I would like to make some modifications from your diagram. thank you.

[@robertcarr5846]

Hi Sam,Great Project, Do you have a wiring diagram that you can share?

[@CNC4XR7]

Yes I do have one I've draw up for this build I plan on going thru it before I get started wiring. If you have any specific parts you want highlighted please let me know. Be safe Sam

[@robertcarr5846]

Thanks Sam, The noise filter would be a good highlight, can you email it to me when it's ready?

[@CNC4XR7]

+Robert Carr will do thank you

[@robertcarr5846]

Thanks have a Happy Thanksgiving

[@CNC4XR7]

Great yea the cabinet is a real bargain very Hd What build are you working on?

[@proengeleceng6861]

What does breaking resistor do ? Thank you.

[@CNC4XR7]

When the spindle is turned off, To stop it quickly we need to absorb the energy of the rotating mass in this case a spindle, however a 6" chuck creates even more energy. This energy is dissipated through the Braking resistor in the form of heat. Most vfd's have small resistors built in to absorb small amounts of energy but nothing that can handle what most CNC machines would produce.

[@proengeleceng6861]

Thank you too much bro.

[@ghulands]

What software did you use to create the wiring diagram?

[@CNC4XR7]

TinyCad its free sourceforge.net/projects/tinycad/

[@plnmech]

Where did you get the wiring raceways?

[@CNC4XR7]

+John McKenna I got mine off EBay. 1 1/4 wire conduit or Panduit.

[@lastcall2night]

Hi Sam, did you have any issues finding your 110V Input, Emerson drive? I can find the 220V version, but no luck on the 110. Thanks, Rich

[@CNC4XR7]

Hi Rich, at the time they were available new At www.galco.com/shop/Commander-SK-Control-Techniques-AC-Drives However I purchased mine off E Bay used.

[@CNC4XR7]

Rich, DID you find a alternative drive? I think I would go with a :www.ebay.com/itm/HY-1-5KW-110V-VARIABLE-FREQUENCY-DRIVE-INVERTER-VFD-2HP-7A-/272563914956?hash=item3f761348cc:g:bGgAAOSwjVVVxFOW This gives you the option of a 1HP or 1.5 HP D80 frame Lesson IEC motor.

[@lastcall2night]

Hi Sam, Thanks for the info. I will review this VFD.

[@jamiewilliams8469]

Is the brake resistor for a z axis Servo break? I have one of their 400w and dyn2 with brake but didn't really understand if I needed to get a brake resistor

[@CNC4XR7]

No it is for the 3 phase spindle motor. The brake your referring to is a holding brake.

[@____________________________.x]

From an industrial panel angle, I'm not sure why you are talking about putting this on a desk, it is designed to be wall mounted. If someone did mount it on the wall, then the cutoff goes on the door along with indication lights, and the fans/cables go on the top/bottom cutout panels. This makes the design a lot simpler. You've kinda wasted a nice box here. The braking resistor would normally go on a vertical plate screwed to the rear mounting panel, typically stuff is never screwed to the actual box, that's why they use use a mounting panel in the first place. Also, mains transformer needs sleeving on the soldered terminals, and the capacitor needs a terminal cover, too easy to short these things if someone was poking around while live. The mains cutoff needs to be dual pole, if someone swapped the workshop's incoming L/N , you'd have live wires in your case. Otherwise, pretty good.

[@CNC4XR7]

Well thank you for those Notes, I have worked in industrial panels for the past 20 years on automated equipment from many different MFG. So I can agree with almost everything you have said. Of course bear in mind this was done on a Budget and limited funds so I tried to fined deals when I could. I was a little uncertain of where the box would be mounted. So putting the Main disconnect on the side made the most since and gave me more options. Wire Ferrel's should have been used on all connections I did try and use shrink tubing to cover things up. Always room for improvement. Thanks Again

[@____________________________.x]

I was in Nuclear Control Engineering for a bit less, same stuff everywhere though. Don't get me wrong though, I could go on all day about how this project is great, it's just that I'm English and we never normally say stuff like that, I was just posting what I hoped might be useful. Sorry if it sounds like I'm teaching grandma to suck eggs. Like your labelling of wires, I've never seen anyone outside of Industry do that, this box is easily the top 3 on KZbin :)

[@CNC4XR7]

I completely understand that the comments were constructive and I appreciate them. From a industrial standpoint there are several things I would do differently. and many of your points are some of those. I will be building another panel soon and hope to incorporate some of those changes however I'm sure I wont be able to get them all. Thanks for the input. Be Safe, Sam