Setting up a used chinese CNC 6040 and got everything to work but the spindle motor. The motor just makes a "whining" noise but does not spin? Do I need to be running 220V input? our shop does not have 220V outlets. Can I get an up converter or something? the seller showed me a video of it working before i bought, but maybe he was running 220v input? any help would be appreciated, newbie cnc user but experinced mechanical engineer