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Type: Posts; User: maxbest

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  1. Thread: Firmware

    by maxbest
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    1,067

    Firmware

    So I am working on a laser cutter and 3d printer with a toolchanger similar to the E3D design with kinmeatic bearings and a servo to lock in the heads. I was wondering which firmware I should use and...
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    Mutlipurpose Laser Cutter / 3D Printer

    So I am working on a laser cutter and 3d printer with a toolchanger similar to the E3D design with kinmeatic bearings and a servo to lock in the heads. I was wondering which firmware I should use and...
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    Re: Linear Motion Breaking

    In relation to my initial question about locking a linear bearing to a linear shaft, I have just found these: https://uk.misumi-ec.com/vona2/detail/110300020760/?CategorySpec=00000424922%3a%3af I'm...
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    Re: Linear Motion Breaking

    i dont mean literally disengaging it from the ball screw but instead preventing it from moving up or down whilst the ball screw is rotating and it has a housing around it.
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    Re: Linear Motion Breaking

    Just because I am thinking that I could then have two ball nuts on the ball screw instead and then engage and disengage them to the ball screw. Whilst still locking and unlocking them to the linear...
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    Re: Linear Motion Breaking

    If i have just a ball screw with a ball nut on mounted vertically, nothing attached to the ball screw or ball nut and I rotate the ball screw, what will happen to the ballnut, will it rotate with the...
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    Re: Linear Motion Breaking

    In this design I would quite like to have it on the same ballscrew but thanks for the idea.
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    Re: Linear Motion Breaking

    Also I'm not to sure what it means by mobile device because I am on a desktop computer.
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    Re: Linear Motion Breaking

    Here are some scsreenshots of some SolidWorks that I just did quickly. The ball screw would be connected to a stepper motor and the linear shaft is fixed to an outer frame (not pictured) the top and...
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    Re: Linear Motion Breaking

    I need an accuracy of about +/- 0.05 mm hence why I think a rack would not work.

    -- Sorry just realised, I probably dont actually need a postion accuracy that high for each section to be held in,...
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    Re: Linear Motion Breaking

    So the positional accuracy has to be exact as possible really, I just dont think that a rack and pinion would be accurate enough even though being much more simple. It is to be used as a...
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    Re: Linear Motion Breaking

    Thank you for your replies, The rack is a good idea however I can't imagine it giving the sort of positional accuracy that I require. I have done a bit more research and was wondering if it would be...
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    Re: Linear Motion Breaking

    Would the holding force due to friction be the same as the holding force of the magnet??? Also is there any other way that I could do this for example have it so that it is braking until the magnet...
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    Re: Linear Motion Breaking

    I prefer the idea of the electromagnet due to the need for building 8 of these, probably making it the more effective route.I was getting confused before due to thinking that there would have to be a...
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    Re: Linear Motion Breaking

    Hi Jim,

    Thanks for your reply, I am aware of stepper motor brakes etc... however in this application it is needed on the bearing / housing around the bearing itself, I was looking at...
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    Linear Motion Breaking

    Hello,

    I have searched the forums however haven't found any applicable results. Basically I need a device which will be able to hld the exact position of a linear bearing on some linear rod(part...
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    Re: Query with Ball Screws and Lead Screws

    I have just been thinking and was wondering if it would be possible to use a mechanism like in a ratchet wrench. I'm finding it rather hard to visualise how it would work but I could make a bearing...
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    Re: Query with Ball Screws and Lead Screws

    The only reason I don't really want to use separate steppers is because that would mean needing to buy 8 steppers as well as the space they take up for a relatively small application. Is there no...
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    Re: Query with Ball Screws and Lead Screws

    Thanks again,

    Attached is a quick mock-up I did on SolidWorks, so there are two nuts on one lead screw and I want to be able to move each one independently by somehow locking and unlocking them to...
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    Re: Query with Ball Screws and Lead Screws

    Hi Jim,

    Thanks for your reply. I really like the idea about using a split half-nut however the lead screws that I was going to be using would of been mounted vertically and so as soon as the split...
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    Query with Ball Screws and Lead Screws

    Hello,

    I am currently working on a multipurpose CNC machine and would like to be able to drive 2 (or more) lead / ball screw nuts on one lead / ball screw. The nuts on the same ball / lead screw...
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