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drilldevil schrieb: hi, i watched the video making the guitar body. i think this will be hard for a stepcraft machine cause of the cutting depth. the biggest diameter for routing bits for hf-spindle is 8 mm.
some weeks before i was cutting through 40 mm plastics (polyethylen). it was really hard work to get through cause of the clamping lenght of the used bit. till around 30 or 35 mm depth all is fine but then i lost the bit twice and damages the working part. i was using a bit with clamping diameter 8 mm and cutting diameter 10 mm.
with other and better cutting tools it will be better but for cutting depth around 40 mm (i think the guitar body thickness is around that) you will be at the limit of a sc hf spindle.
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I don`t have any experience with the fourth axis, but I looked at the pictures on Stepcraft site: https://www.stepcraft-systems.com/en/accessories/system-accessories/cnc-accessories/circular-table-with-three-jaw-chuck . There is a Proxxon logo on the chuck. The only Proxxon chuck in that size and appearance seems to be the optional three jaw chuck (item 27026) for the lathe DB 250 seen here http://www.proxxon.com/en/micromot/27020.php?search#27026 . Capacity inside for this chuck is 1.5 to 32mm, but the ends of the jaws could hit the clamping surface when attaching max size. I could be wrong though. Maybe someone can confirm that.WolframSlides schrieb: ...
Firstly, what is the maximum size of workpiece that can be held by the Stepcraft fourth axis chuck? To do what I want, I really need to be able to clamp a 1" diameter solid plastic cylinder from the outside. I guess if the Stepcraft-supplied unit is too small for this, I'll have to investigate a third-party solution or make something.
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In the Stepcraft Operating Instructions under Intended Use it is said that "you should work using milling cutters with a diameter of up to 3mm". Aren`t larger ones risky to use?drilldevil schrieb: ...
the biggest diameter for routing bits for hf-spindle is 8 mm.
some weeks before i was cutting through 40 mm plastics (polyethylen). it was really hard work to get through cause of the clamping lenght of the used bit. till around 30 or 35 mm depth all is fine but then i lost the bit twice and damages the working part. i was using a bit with clamping diameter 8 mm and cutting diameter 10 mm.
WolframSlides schrieb: ...
Finally, just for fun, would the Stepcraft (with 500 watt HF spindle) be capable of replicating these projects: (I understand that the machine would have to be run more slowly, with a lower feed rate, but could it be done if I had sufficient patience?)...
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tikka schrieb: In the Stepcraft Operating Instructions under Intended Use it is said that "you should work using milling cutters with a diameter of up to 3mm". Aren`t larger ones risky to use?
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