tag:blogger.com,1999:blog-5557902467288736826.post260744350283274687..comments2024-01-30T16:23:11.245-05:00Comments on AE1S Science and Engineering Blog: SteppIR BigIR - broken element drive shaftAndrey E. Stoevhttp://www.blogger.com/profile/12033396081050348304noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-5557902467288736826.post-62024651861394216322021-05-01T08:36:07.861-04:002021-05-01T08:36:07.861-04:00I dont think metal shaft is possible - the cogs ar...I dont think metal shaft is possible - the cogs are in full contact with the antenna element so metal shaft will bring high voltage RF into the stepper motor and the shaft, the windings and control cable back into the shack. It can possibly destroy the driver chips in the controller. the shaft has to be made of strong yet non-conductive material - there are plenty of strong glass-filled plastics. I think the problem comes from how the shaft is attached to the motor shaft - just pins going thru and creating high-stress points in the plastic with very little material around.Andrey E. Stoevhttps://www.blogger.com/profile/12033396081050348304noreply@blogger.comtag:blogger.com,1999:blog-5557902467288736826.post-60409742656971376722021-03-26T15:19:22.623-04:002021-03-26T15:19:22.623-04:00BTW, anyone found someone making a metal version o...BTW, anyone found someone making a metal version of this shaft?<br /><br />Richard VE2DXRichard G. Desaulniers Sr, VE2DXhttp://www.ve2dx.comnoreply@blogger.comtag:blogger.com,1999:blog-5557902467288736826.post-45144906687260134242021-03-26T15:16:25.159-04:002021-03-26T15:16:25.159-04:00Well did not take my EHU apart yet! but everything...Well did not take my EHU apart yet! but everything looks like I got a shaft failure here too!<br /><br />73<br /><br />Richard VE2DXRichard G. Desaulniers Sr, VE2DXhttp://www.ve2dx.comnoreply@blogger.comtag:blogger.com,1999:blog-5557902467288736826.post-24871905160607058322021-01-22T13:48:32.860-05:002021-01-22T13:48:32.860-05:00I have same failure with Ultrabeam. Antenna 2 mont...I have same failure with Ultrabeam. Antenna 2 month old, Year 2021...4X6HPhttps://www.blogger.com/profile/12055661812172033335noreply@blogger.comtag:blogger.com,1999:blog-5557902467288736826.post-84672711364801128712015-02-06T12:29:34.859-05:002015-02-06T12:29:34.859-05:00One more reason not to buy SteppIR.
I had EHU fai...One more reason not to buy SteppIR.<br /><br />I had EHU failure due to fatigue on the spring that recalls the elements.<br /><br />See the pictures here:<br /><br />http://atr-br.com/soci/photo/useralbum/iv3gke/4Roberto Turco (IV3GKE)http://atr-br.com/soci/photo/useralbum/iv3gke/4noreply@blogger.comtag:blogger.com,1999:blog-5557902467288736826.post-29243192123706632602012-07-16T10:36:20.789-04:002012-07-16T10:36:20.789-04:00Thanks for your post.
I have now had 3 shaft failu...Thanks for your post.<br />I have now had 3 shaft failures on a 4 ele StePPi Yagi in 6 years.<br />Not supporting the end of the shaft is incredibly bad engineering, plus using a roll pin.<br />They should have recalled like a good Company would.<br />G4BIMAnonymousnoreply@blogger.com