I’m doing a lot of brass at the moment and am likely to be for a while. I am looking to build another machine that is smaller than my LR3 I’m currently using to do this. Question is, is there any advantage at this stage in development to go with an MPCNC over a LR4 for this application? Specifically, I’m thinking about rigidity and speed. The LR3 is already accurate enough for my needs and I’m sure the MPCNC would be as well. Thanks for the advice.
LR4 is more rigid than LR3. If you have an LR3 already, use that to make parts for an LR4.
You’ll love the LR4.
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Also second the LR 4.
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the LR4 on the same table will have capacity for a bit more X, and be more rigid and capable. That makes it pretty attractive.
A Primo in a small form factor is a beast. The primary advantage that my Primo always has is hold-down options. Because the gantry rails always ride at a constant height, pieces can more easily be bolted down to the spoilboard using threaded inserts and clamp pieces. For pieces that can’t be easily screwed down it’s much more flexible. (Like for example, I use that to drill and shape pieces of aluminium heat sink for audio amplifiers, so I can get CNC precision for the holes.
I’ve tried similar approaches with the LowRider, but with the gantry passing over at a variable (and low) height, it doesn’t work nearly as well.
So I guess it depends on what you’re doing with the brass. If you’re trying to make things that are going to be difficult to hold down to the spoilboard, a Primo may well server you better.
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