Leveling the Table

secure your sacrifice plate to the machinebed
create a pocket square in the max size for your machine.
use a flat bit of 6mm or larger if you can and set a depth of 0.5mm

note. beware that the spindle does not run into the Y-ax sides

now let it go, after a while you have a flat board, and if 0.5mm is not deep enough run it once more

have fun

Thank you... an example of the bit? a link or something?
A 6mm flat bit needs another collet? I have MM1000 with 3.175 colet.

For the best result you should buy a 6 mm collet, however you can buy a 6mm flat head bit with a 3,17mm shaft;

https://nl.aliexpress.com/item/HSS-Router-Bits-Wood-Cutter-Milling-Fits-Dremel-Rotary-Tool-Set-10pcs-1-8-3mm/32356539397.html

remind that you have to reduce the feed speed otherwise there is to much tension on the bit-shaft and than it breaks or will bent.
these are not the best you can buy but will do the job.

If you want quality bits go to : https://www.sorotec.de/shop/Zerspanungswerkzeuge/sorotec-werkzeuge/

I used a standard 1/4" HSS endmill with complete success. Just keep the revs high (> 12000rpm) and the depth of cut to about 0..25mm. A cutting speed of 600mm/min seemed appropriate, though it may well have been possible to increase this without any ill effects.

Peter

But the plastic table is very poor material.
You can try to level it, but when you press with your finger just a little at vertical direction it will sag 1/10 or more.
From my point of view this is crap.

I would get a suitable table like this one:
https://www.sorotec.de/shop/CNC-Portalfraesen/StepCraft-Portalfraesen-mit-Sorotec-Service/StepCraft-Portalfraesen-mit-Sorotec-Service-347/T-Nutenplatte-fuer-Stepcraft/

I should have pointed out that I have an aluminium T slot table, and the MDF spoil board is screwed to this by countersunk M6 screws and nuts. After machining, a dial gauge check shows a variance of less than 1/10mm over the whole surface.

My vacuum fixture for PCB milling is better than 50 microns over an 8" x 6" area. (Sorry for mixed units - I am comfortable with and use both Imperial and metric measurements, and swap from one to the other indiscriminately).

Peter

The BlackEdition i have is already equiped with an aluminium table. I am talking about the MDF i want to pout over it.
Peterg1000 since you have the same mdf setup can you take a picture of the sacrificial table? Do you cut a table with a specific desing for allowing the under t-slot to be usable ?

Ok, thanks.
That makes a lot of sense !! B)

I also use an aluminium table + 19mm MDF screwed on.
Next will try to get the MDF calibrated here at carpenter's workshop.
They have a wide belt finishing machine (wide belt grinding machine, don't know the correct term);
hope this will do the job ...