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Type: Posts; User: peteeng

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  1. Re: Controller board to cut Bezier curves?!??

    Hi Jimw - What you describe is possible but the CAM system will still discretise the curve (any 3D curve even straight lines) into tiny bits because that's the only way the motors know how to work....
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    Re: Simple 2 or 3-axis CNC

    Hi Amdam - You will still need 3 axes for the drilling. Any of the cheap chinese "engravers" routers will do your job. Use UCNC it will be easier then Mach4 or the cam that comes with the machine. A...
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    Re: Fixed Gantry Build

    Hi UCB - To address the weld distortion issue you could soft solder the parts together. There are many solders in the 200-250degC range that would provide the required strength. At this temp there's...
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    Re: Fixed Gantry Build

    Hi Jack - If weight does not matter then picking a much thicker tube is more economic than using EG. The size of the steel tube and its weight indicates it will vibrate at a freq outside the usual...
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    Re: Fixed Gantry Build

    Hello Jack - I used Izz so did compare torsional rigidity. Adding the internal brace stops the section from lozenging. This is a different approach then filling with epoxy. Adding the brace correctly...
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    Re: Designing new Router called Maximus

    Hi All - This week I become a very squeaky wheel and send RFQ's to other companies. Two people have left the sale Dept it seems and they are bogged. But there are other suppliers out there. I've been...
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    Re: Fixed Gantry Build

    Hi Jack - I doubt filling a tube can "massively" improve torsional stiffness please provide a calculation to support the claim. The only way to massively improve it is to make it bigger as its...
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    Re: Fixed Gantry Build

    Hi Jack - There are 100's and 1000's of successful extrusion gantry machines out there. Consider 1) that the inside of the extrusion is a small % of the total geometric inertia of the section so...
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    Re: 1st Build, will this be a decent Design?

    Hi BFP - Look at stepperonline. They have european distribution for motors, drivers, PS and other CNC stuff. Peter
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    Re: X and Y axis not 90 degrees

    No photos Don? Peter
  11. Re: Looking for a CNC router to cut fiberglass+

    Hi point -If your going down the path of CNC think about a tangential cutter. From my experience in production composite parts cutting cloth is the slowest and most inaccurate task. If you CNC your...
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    Re: CNC machines from plywood

    Hi Yuri - I use white PVA glue diluted with water 50/50. Its cheap and seals the surface very well. It can be applied after the machine is built, is easy to get into corners and after a few coats...
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    Re: Fixed Gantry Build

    Hi Pippin - Yes agreed, but chatter is a machine design shortcoming just as machines that vibrate are a shortcoming. Epoxy granite construction is interesting but I can't see it as an economical...
  14. Re: Looking for a CNC router to cut fiberglass+

    Hi Point - Any commercial router will cut the FG sheet as you like. You will need diamond burrs or tools that are used for PCB's. FG is very rough on HSS or carbide. The edge doesn't hang in there...
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    Re: Fixed Gantry Build

    Hi UC - epoxy filling success is gauged by what? Sure you can do a successful fill but did they check the harmonic performance before and after the fill? Vibration is caused by the motors so you can...
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    Re: Fixed Gantry Build

    Hi UC - Filling the extrusions with "epoxy granite" is an expensive exercise and does not improve performance relative to the cost and effort. Your much better off using steel or aluminium heavy...
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    Re: Need to flatten 5/8" thick aluminum plate

    Hi Jim and Chris - If you anneal the plate it will be too soft to use as a machine base. It's a 2mm bow which is way out of the supply spec. If it's not too late read the supply spec and if the plate...
  18. Re: Need Vacuum/ spoil board suggestions for small thin alum. Labels!

    Hi Nicol - For 5000 make a custom vac jig and use an O-ring (hole thru to a passageway) to hold each piece down. Don't try to pull vac thu a material. Say 200-500 pieces to a board each with an...
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    Re: Designing new Router called Maximus

    Hi All- Still waiting, I spoke to the Sales Manager and he's on the case now. I've been looking at racks, here's a catalogue. Peter

    Apex Dynamics :: Rack & Pinion

    catalogue too big so here's...
  20. Re: Need Vacuum/ spoil board suggestions for small thin alum. Labels!

    Hi Nicole - No matter what spoilboard you use when you cut holes in your job you are going to loss vacuum. What you need to do is cut a groove in the board and place a gasket it in so the gasket...
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    Re: 1st Build, will this be a decent Design?

    Hi BFP = There's certainly lots to be challenged on the electronics side of the project. It can take up a lot of time and be very frustrating if things don't work out. And it may not be your problem...
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    Re: 1st Build, will this be a decent Design?

    Hi Big - Look at buildbotics - one box solution, great for a newbie. I use UNCNC on 3 machines and its been easy. I'm looking at Buildbotics for the next one. Peter
    ...
  23. Re: Looking for a 5000$ precision CNC router HELP

    Hi Seeds - Your going to have to be very thoughtful and knowledgeable to achieve 0.01mm accuracy. Peter
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    Re: Designing new Router called Maximus

    Hi All, thanks Ericks- Here's one on Aluminium Extrusions and I found one on UCCNC CAD to DXF - Peter
  25. Re: Looking for a 5000$ precision CNC router HELP

    $5000USD ? Peter
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