Stell frame cnc 1500X1000. Adjustable table your opinion please

[ba99297]

Hello everybody and happy new year
I reastart my project that has been stoped for more than 6 months
I finally epoxy level X axis and i will do the same with the y axis (the gantry) as the milling of the gantry wasnt as good as i expected
I will apply two layers of epoxy 4mm each.

Many off you may wonder why i go with two layers of 4mm instead of one layer 5mm.
To be honest this is the second try of epoxy level the gantry
The first try went wrong
It wasn’t the resign as i had no problem with the x axis leveling
The reason off the first fail was this


After having the gantry milled there was a 3mm groove for the master rail.
At the first epoxy try the groove had been covered with epoxy so the epoxy had 5mm thickness above the groove and 2mm thickness next to the grove. i don’t know if i am understood.
So at the second try i choose to cast two layers. The first one will cover the groove and cover the 3mm gap and the second one will be layed on a flat surface.
Today morning i start with the first layer
First i put the gantry lay on the x axis blocks as x axis is perfectly leveled after the epoxy method



I zero my dial gauge in order to level the gantry parallel to X axis.
The 1.9 degrees tilt that the gauge show is a permanent error after an accident




In order to achieve perfect level tuning i use some screws as jacks


I knew that i couldnt have zero level at every point of the gantry as the gantry is not true flat. I was trying for an average zero level.


All the previous night i use an electric heater to rise the temperature to 20-21 celcious

Today morning i start creating the dome

I use both mdf and foam



Here is the epoxy i use


More than 10 hours working time
300 mpas viscosity
Pot life 29 hours (70 ml at 23c)
and here is the data sheet
http://www.resoltech.com/IMG/pdf/DS_...21.07.2016.pdf


Price 36 euros




Thanks for your time
Will be glad to read your comments

Vagelis