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I'm frequently doing small parts that measure 1" x 1" x .5" (LWH). Will they be too small for a vacuum table to have enough surface area to keep them locked in position?
I'm working in wood- Pine, Oak, Poplar, ect.
Right now I'm using tabs to hold them in place, but it requires finish work to clean them up and I'd like to avoid it!
Considering This or similar: https://cnc-plus.de/en/Workholding/Vacuum-Tables/VT-4060-Vacuum-Table--Vacuum-Clamping-Plate-400x600mm-.html
Stepcraft 2 420
500 Watt Spindle
3D Printing System
3d Probe
T-Slot Table
Tooling:
1/8" 60 Deg 4 Flute V Bit
1/8" 4-Flute Square Nose End Mill
1/8" 2 Flute Ball Nose End Mill
1/16" 2 Flute Ball Nose End Mill
UCCNC and VCarve Pro
Total Newbie!
Veröffentlicht : 20/03/2016 8:15 am
Hi,
I made my own from scrap wood so as to mill small printed circuit boards, and used a small vane type vacuum pump to get a good vacuum. All the unused exposed holes I seal with clingfilm (ceramwrap in USA?) and or masking tape so that I can get a reliable 0.8 - 0.9 bar pressure difference when working. With your 1" square parts that would amount to some 12lbs holding down force.
I milled the top surface flat whilst in position, and have measured the overall flatness to be better than 0.001" - very necessary when milling pcb tracks 0.01" wide.
The vacuum pump is a cheap Chinese unit similar to this :-
SC 420/2, Industrial VFD spindle from StoneyCNC
UC100 + UCCNC
Cut2D, Autosketch10, Draftsight, Eagle 9.5.1
There is no problem, however simple, that cannot be made more complicated by thinking about it.
Veröffentlicht : 20/03/2016 12:07 pm
Best chance to come along without tabs is this: Vilmill
SC 420 mit DIY parallel + Proxxon mit Mod + HF500 + SprintLayout + LibreCAD/QCAD + FreeCAD +WinPC starter/USB->EstlCAM + EstlCAM LPTAdapter + EstlCAM Handrad + DIY Vakuumtisch
Gruß, Andreas
Veröffentlicht : 20/03/2016 1:17 pm
