DIY Milling Machine Part 6: T-Slot Machine Table and First Movements!

[@maq-Yantek]

How beautiful it was heard cutting the steel in your other machine, music to my ears

[@JlerchTampa]

4:00 That elastic strap 'auto-feed' is pretty clever!

[@IronForestKnives]

Looking great! Love that bandsaw auto feed lol

[@thorstenoerts]

You've made the most over-engineered pen plotter in the world :D

[@sasazenny1750]

Then you haven't seen DMG's 9-axis pen plotters yet :D

[@angelinigo9783]

Congrats, Alex.Excellent job

[@NeonStorm5]

This is probably the most expensive pen plotter I've ever seen but those crisp clean lines make it worth every penny.

[@daskog]

It's alive! I'm in love...again.

[@molitovv]

Congratulations, amazing progress.

[@routercnc9517]

This is going to be a great machine when it is finished !

[@jesseconklin]

Wow. You do such nice work. I can't wait to see it make chips!

[@cnc-ua]

Great progress. Thank you for sharing. Looking forward to hearing from you soon

[@TrPrecisionMachining]

good video alex..thanks for your time

[@nickvanwyk126]

Hello Alex. Very good work.

[@airgunningyup]

your router is such a beast , most people wouldnt even think to upgrade

[@AlexCNCen]

The problem with the old machine is Z height. Stability is already pretty good.

[@RolandNSI]

Extraordinary job !

[@TheMIroslaVbachev]

Hey Alex, this is one of the best DIY cnc on KZbin. Great work!!! One thing I would have done is to put dowel pins between the base plate and the bars that form the T slots. Machining forces can knock the bars out of alignment.... Maybe🤔. Great work anyway!!

[@AlexCNCen]

I thought about that but I'm not really worried. The screw spacing is about the same compared to the linear rails. And even if something moves it won't hurt the accuracy of the machine. Just aligning thing won't be that nice anymore. So I didn't put in any pins for now.

[@rameezsheikh7576]

Hey alex ! Good work , keep going !

[@IvanStepaniuk]

Amazing! Can't wait to see this in action!

[@vigisbigtm]

Love it. Great dedication!

[@engineerdiy4500]

Good job!

[@luankadiri9720]

Hi Alex nice work. What kind of servomotor did you use?

[@bobweiram6321]

You owe Stefan a lot of machining time! He pulled you out of the precision despair. Btw, those rapids look a but scary. You need a house for the new dog.

[@AlexCNCen]

Enclosure is already completely planned and the material is already here.

[@pdj26]

Great video Thank you for Sharing I can't wait to see the finished Machine👌👌👍👍💪💪

[@isavega6838]

Good job alex

[@joshmyer9]

This is great progress! At 14:09, do you have any idea why it sounds kinda like a slide whistle (»Lotusflöte«) during the jogs? I'm pretty ignorant, but I don't think I've heard a mill make a sound that depends on position like that. It would make me nervous that something was loose or off-center on drive shafts, causing them to vibrate at a frequency depending on where the table is at. It could also just be the resonance of the little pocket they're in, which could be tested by throwing some rags in there to spoil the resonance. Anyway, this is awesome, and I'm really looking forward to seeing the first chips!

[@AlexCNCen]

Alignment should be fine but I also noticed that an will check everything again.

[@Thorhian]

This is looking awesome! Super glad you are using LinuxCNC too. It's stupidly capable even if it's hard to get into. Question: Did you consider using precision dowel pins for locating the strings of steel that make up the T-Slots? I feel like that would be one way to lock them in fairly well. Maybe I'll have to try and make my own t-slots once I finish the enclosure to my mill and the wiring.

[@AlexCNCen]

I considered dowel pins but I will try it without. The spacing of the screws is similar to the linear rails. So I'm pretty confident that nothing will move :)

[@maruthupandian3728]

slowly taking shape! baffled by how you have got all this equipment into your basement shop. does the pneumatic cylinder work well as a counter-weightt substitute? i have a maho on which i would like to try this on.waiting for you to make the first chips...

[@AlexCNCen]

I haven't activated the cylinder yet. And I'm not sure if it is even needed. The Z servo is at 15-20% load to hold the Z Axis. Spindle and spindleservo are still missing.

[@maruthupandian3728]

@@AlexCNCen thank you, i eagerly wait for the completion of your machine.

[@iainsquelch6223]

Alex, I suspect you selected servo motors rather than stepper motors for the mill? What size (kW) motors did you use for the axis?

[@AlexCNCen]

I have 400 W on X, Y and 750 W on Z.

[@Ale_Lab]

The CNC is coming together so nicely. Are you a ming to make an enclosure out of aluminium profile or leave it without? Would you mind share the source for the precision ground steel plate? Thanks a lot

[@AlexCNCen]

The machine will be fully enclosed. I don't want to see a single chip on the floor. That's the plan at least 😅. The source for my plates is the Marks GmbH. But you can get those plates at a lot of different shops.

[@Ale_Lab]

@@AlexCNCen ah wow amazing. Fully enclosed. That will be another project on its own. Are you going to use flood coolant?

[@Ale_Lab]

@@AlexCNCen thanks for the shop info

[@AlexCNCen]

No only mist coolant. Flood would have been nice but also requires more space.

[@Ale_Lab]

@@AlexCNCen yes true. Since your machine reached the bottom you would need a side tank for it to work. I also use mist coolant and for what I do it's ok. Is the enclosure going to be welded or with aluminium profile?

[@wilcojuffer5940]

Hello Alex, in the t-slots plate you have also 2 or 3 fix pins ? Nice video see for the next one

[@AlexCNCen]

There are no fix pins. The screw spacing is narrow compared to the linear rails I use. So I'm not really worried, that anything moves.

[@Tektron-inc]

That is a nice milling machine Alex. What material did you use for the T/slot bars ?

[@SeabassEngineering]

Lovely Job.

[@thomasegjoergensen]

Uh nice! English version! I've been practicing my primary school german since you started the series ;-)

[@bitp1mp]

Those rapids! :)

[@proyectosycnc]

Gran trabajo de scraping!!

[@lisamarieschulz4281]

Wo hast du die linearführungen gekauft

[@AlexCNCen]

Die hab ich von nem Freund bekommen als neue alte Lagerware.

[@JesseSchoch]

is that probe a DIY probe? if so any details you can share?

[@AlexCNCen]

Yes that's DIY. I planned to make a video about that for a long time. I think after finishing the milling machine I will do that.

[@athrunzala5337]

I noticed there's no usage of coolant . . . why?

[@airgunningyup]

any plans for an ATC ?? manual tool changes are fine , but many it gets old when the part requires a few

[@AlexCNCen]

Only manual change for now. An automatic changer needs a lot of space. I'm mostly doing quantities of 1-5 pieces. So an automatic changer is not super important.

[@RoyMeraki]

This table is made from steel or aluminium?

[@AlexCNCen]

It is steel (C45)

[@PWLopes9000]

Hey Alex, where do you buy the precision ground plates? And how much did those two cost? Great work 👌

[@AlexCNCen]

I bought them from Marks GmbH. If I remember correctly both plates where around 350 €

[@car9167]

What distance you have between the rails in X, Y and Z?

[@AlexCNCen]

The rails are spaced around 250 mm on all axis.

[@car9167]

@@AlexCNCen Thanks. Have you considered the airy points for the X axis blocks location under the table? en.wikipedia.org/wiki/Airy_points

[@AlexCNCen]

I know that but I there where other constrains, so I wasn't able to get the best distance everywhere.

[@MotoGud]

What is the budget of the machine?

[@AlexCNCen]

I have spent about 7k€ without spindle and controller.

[@regalheros347]

Very nice. LinuxCNC 👍

[@ikbendusan]

15 m/min rapids?

[@AlexCNCen]

12,5 m/min. That's also the limit with the belt reduction and the 5000 rpm of the servo motors.

[@ikbendusan]

@@AlexCNCen nominal 5000 rpm or maximum? asking because i also bought servos that can do 5000 rpm maximum but nominal is 3000 at the rated torque, wondering if i should do a 2:1 reduction like you and spin at 5k for the rapids

[@AlexCNCen]

Nominal are 3000 rpm for those servos. That are JMC 230V 400W servos. A friend has a similar configuration and that works just fine. The acceleration in the video was 3 m/s² and that's not the limit.

[@ikbendusan]

@@AlexCNCen ah alright. i've seen people go over 0.5 G acceleration with the 72 DC motors, so more than even that should be easy

[@AlexCNCen]

For more than 3 m/s² I need a brake resistor. Otherwise the servo drive goes in error mode while braking

[@aquilux-vids]

Your video made me really think of the difference between strips and stripes for the first time. Just so no one gets the wrong impression: We all understood what you were saying, and given how often english breaks it's own rules that's all that matters. I was just left wondering about why we have two nearly identical words for two identical concepts except for that one refers to it in a 3d object context (strips, with the "i" pronounced like in bridge) and the other in a 2d, almost visual only context (stripes, with the "i" pronounced like in ice). English is weird.

[@AlexCNCen]

Thanks for explaining the difference :)

[@ChristopherJones16]

@@AlexCNCen Are you Dutch? Your accent reminds me of the creator of Blender 3D, Ton Roosendaal who is Dutch.

[@engineerdiy4500]

👍

[@Zappyguy111]

Fun side project, make it play music :P

[@blacksimpson]

Spindle extension block made of concrete?? Not a good idea for the motors or ballscrews

[@AlexCNCen]

Why not?

[@blacksimpson]

@@AlexCNCen By the way , very nice build. I'm just worried it would be too much weight for the 750watt servo and bearing blocks?

[@AlexCNCen]

No worries. It is a 32 mm spindle with 5 mm pitch which can handle much more weight. The Z axis is around 70 kg. In addition I have added a pneumatic cylinder to support that weight. Turned out not to be necessary but does not hurt either. Bearing blocks are made with special bearings for balls crews. They can also handle the forces.

[@ChristopherJones16]

Question for machinists. How come you guys dont make your own linear rails and buy the rails.. AND the carriage? Are they really that difficult to make?I mean I guess the carriage could be more difficult.. but ive seen guys 3d print both and they worked relatively well for being plastic rails and and plastic carriage... for use on a 3d printer. Its quite impressive. You can search youtube for the guy with plastic linear rails. he demonstrates them.

[@DolezalPetr]

wow

[@Rohman.177]

u re awesome 👍😀👍

[@SariAlHiari]

Gloves

[@jalasonic]

bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbravooooooooooooooooooooooooooooooo

[@BIGOS-CNC]

👍

[@DPTech_workroom]

👍