Very nice. No one has made a video tutorial on the basics. Start with software and cut a hole or mill a pocket. Your vids ate very good
@coolbutwhy5568
4 жыл бұрын
I have a contour cutting video in the making, but video editing does take a lot of time. It will be here in a few weeks.
@markgreco1962
4 жыл бұрын
Cool But Why thanks 😊
@Gzalo
4 жыл бұрын
Hi! Loved the series, just have a couple of observations: Watch out as some stepper motors might lose quite a bit of force (20-30% apparently) when opened, if the rotor touches the housing. As an alternative, you could use a flexible coupler instead of the rigid coupler, and add a collar as a sort of trust washer. Besides that, I was thinking that you could have used some antibacklash t8 nuts that they sell commercially (which are basically a long brass/nylon nut split into two, with a spring in between). I think that should eliminate part of the backlash that you are experincing. And endstops aren't just for homing, they are useful to avoid destroying the hardware (either the motor will stall or the coupler will break) if something goes wrong with the gcode or operator :P And regarding the couplers, you could have filed a flat segment so that the setscrew works better and you don't need to use adhesive to fix it in place.
@coolbutwhy5568
4 жыл бұрын
Hello and thanks for your feedback. Here are some quick thoughts: - losing motor power when opening the motor: I’ll try to find more on the subject. I think this might be true for bigger industrial motors, but for the Nema 17, I just think they are built in small factories in China by hand and, when put together, the rotor will inevitably touch the casing. I haven’t noticed any loss in power, in any case. - the flexible coupler was exactly what I wanted to avoid, because that would mean another set of 2 bearings on each axis, to preload and fiddle with. This was the initial configuration in the Bubblegum kit (which served me well for a few years and for which I’m 100% grateful). - endstops: when I crash the machine, it’s always either in the stock itself or in the fixtures. But you’re right, it should be a welcome safety net for the machine, just need to find the time to do it. - the spring based antibacklash system (which I’ve already tried, as shown in the X-Y video) induces permanent friction, which is difficult for the small nema 17 to overcome. To make things worse, when cutting, the machine will just push the leadscrew on to whatever flange of the nut it wants, overpowering the spring. - as to the flat segment on the leadscrews for the grubscrews, it just didn’t cross my mind. I was also having a lot of trouble aligning it with the motor shaft (more than the video shows), so I didn’t want to touch the leadscrew too much. Anyway, thanks again and hope to see you again in the comments.
@jesperap
4 жыл бұрын
Please make a video on upgrading to an ER11 collet, like you talked about in the first video. Your videos a top notch👍👍👍
@coolbutwhy5568
4 жыл бұрын
Hello. Yes, I'm looking for the courage to make this mod. I received the ER11 shank a few weeks ago and it’s got a lot of runout, so it will probably be a multi-part series. I have a few other videos in the making on other subjects in the meantime.
@jesperap
4 жыл бұрын
Cool But Why that would be so amazing!!!
@YooProjects
3 жыл бұрын
Super professional work 👍
@JanBinnendijk
3 жыл бұрын
Homing the machine is as important on a mill as it is on a 3D printer.. it allows you to save the position of your workpiece when you have to switch of the machine during a job.
@eutritzschjones8293
4 жыл бұрын
Hello Cool but why.....i really enjoyed watching your videos.....i learned a lot. My MF 70 is still in the box, my shop is not ready yet. In the first video you say, that you will explain in a later video how to replace the original shank collet for er11. Do you now know, how to do it? I dont want to change the motor to reduce rotation speed or buy the tuning spindle AND planetary gears from usovo. They are pretty cool....but also pretty €€€ :-/
@coolbutwhy5568
4 жыл бұрын
I was asking myself whether Usovo is still making the ER11 replacement shank. In any case, it costs a lot and I’m not the “happy-money-spending” type of person, so my mod will probably take a bit of effort. Anyway, good luck setting up your shop.
@catcam
4 жыл бұрын
Thanks for great content .... MF70 is still on the shelf (waiting for retirement ?) :)
@coolbutwhy5568
4 жыл бұрын
Hello! Well, mine is alive and well, far from retirement I hope. I made a new video of it cutting aluminum: kzitem.info/news/bejne/u2xrnI6Hr5WQqqw
@YooProjects
3 жыл бұрын
Can I buy original proxxon mf70 cnc control unit?
@sshah876
Жыл бұрын
Great! hey how did you calibrate - any pointers or snap shot of your settings at grbl prog/gcode app would make my cnc conversion of this machine easier... cheers.. do you have a discord/email?
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