Mpcnc

[Roberts_Clif]

Found a problem with the MPCNC Design.

Bearing 1.jpg



You can see in the middle assembly, that the 5/16 bolt head and the Bearing are touching, This will have to have thinner Bolt Head.
Will be Grinding about 1/2 the thickness of the bolt head away to allow the bearing to freely spin...


Bearing 2.jpg

[Roberts_Clif]

The build is going quite slowly, simply because when I started this project, was hoping to use some of my spare 3D Printers parts.
This scenario is quickly proving not to be the case with the MPCNC carriage growing heavier than expected,.
Decided on the controller, drivers an lead screw. An Arduino Mega with Ramps 1.6, this one is equipped with a mosfet heat-sink
Decided to use the T8-2 lead screws this is a trapezoidal 8mm lead screw that has a pitch of 2mm per revolution.


As you can see the carriage has been assembled with a minor setback again needing to order stronger steppers and a new T8-2 Lead-screw.
This by no means will stop me from partially assembling the MPCNC's other components while I wait for the remaining parts to arrive.

Assembled with a temporary 56oz Stepper an T8-8 Lead screw

[Roberts_Clif]

Today received the Arduino controller the Ramps 1.6 with five A4988 drivers modules.
Decided to upload a known Firmware Marlin 1.1.5 to test the the basics, found that I needed a CH34X driver before it would allow an upload.

Marlin 1.1.5 with the controller an Ramps 1.6 an drivers modules boots, however Marlin for MPCNC is going to need some firmware changes as it is displaying garbage.
Will go over it very carefully to see what i missed.

Ok Missed the Full Graphics Boot Screen, works now.

[curious aardvark]

can you use grbl for this ?

So much more user friendly than marlin (what isn't ?)

Other than that, looking good :-)

[Roberts_Clif]

can you use grbl for this ?

So much more user friendly than marlin (what isn't ?)

Other than that, looking good :-)

I can choose between Marlin and grbl for Cyclone. I just testing my Controller with Marlin will see about testing grblForCyclone real soon.

Today I received the five steppers motors, and setup a Ramps controller test, decided to start with a V-Ref of .450. Setup all steppers an preformed simple moves on X, Y, Z, X2 an Y2


Do you have a simple tutorial of why grbl is better

Thank You

[curious aardvark]

Um, I use grbl on my laser engraver. Had no problems.

The only machine I have with marlin on is the i3. And it is hands down the most unfriendly firmware I've ever come across.
Doesn't even have a load filament option.
So if there's a viable alternative to marlin - I will always go for that :-)

If there were any way to ut something else on the i3 - I would in a heartbeat.
Repetier is great firmware, as is sailfish (what the replicator clones use).
But marlin - just is horrible at every level.

PLus lasergrbl will update the grbl firmware direct from itself.
marlin you have to bugger about with ide - horrible software.

I have yet to see any benefit of any kind to pissing about with marlin.

[Roberts_Clif]

1st Print on my MPCNC was a simple pen sketch of a Crown

IMG_2283.jpg


MPCNC (508mm X 762mm X 292mm)
2277.jpg

[curious aardvark]

lol you know that upside down crown looks like cleavage ? :-)

But proves it works !

So have you got a touch probe for depth/surface sensing - or just doing it by eye ?

Impressed with the cat print ;-)
Does it also make aardvarks ?

[Roberts_Clif]

The crown was printed with-out end-stops, it will require a touch sensor of sorts.

I have not decided which one yet. suggestion on cheapest for the longest life.

Today I decide to test test main floor platform for level.
With ~6mm above the bed then lowered the Tool plate 6mm on all four corners an dead center the platform.
Being really close to the main floor platform here, took my filler gauges out and began measuring the height.
After comparing all five locations, deturmined that the MPCNC that I just built is measuring 0.06mm from level.

Knew I was being careful making my EMT Conduit cuts, but never ever expected that I was being this precise.
This is going to be is enough to mount a Large Aluminum Plate above the floor Platform, heated or not heated.
For 3D Printing large 508 X 762 X 292mm Models WoW! this is going to take a long, long, long, time to print.

A simple Benchy 4X size will take1 day with .4mm nozzle with a 1mm nozzle prints will take 5 1/2 hours.
This may be doable.

[Roberts_Clif]

Today my DC-DC Step Down Buck Converter 1.5V 3V 5V 9V 12V and Adjustable at 3 amps Modules came in.
I am now powering my ramps with a 20amp 24volt power supply.

I removed D1 replacing it with the output of the buck converter I soldered the diode anode side to IN (24vdc) and soldered the diode cathode side to VO leaving the GND terminal to be soldered to the Ramps ground Power Connector.



I did not install a DC-DC Step Down Buck Converter Module set to 5volts to replace the AMS1117-5.0 at this time
This was on my agenda so I could use the full graphics controller that draws to much current from AMS1117-5.0.

Will do this after the Full graphics controller arrives.