Hello Guest it is March 29, 2024, 11:53:30 AM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - kcib

Pages: 1 2 3 4 5 6 7 8 »
1
General Mach Discussion / Re: Huanyang VFD & Spindle Warranty Problems
« on: September 12, 2013, 07:23:55 PM »
Sorry that you have had problems with two of these spindles, I have two of these Chinese spindle motors and VFD's one 2.2Kw water cooled motor which has done some 500 hours now without one problem and a 4Kw air cooled motor which has around 250 hours again no problems they are very quiet which is why I bought them and at a good price off of Ebay and I know of others who have these motors and have not had any problems so I think that you have been very unlucky with your purchases, do hope that you manage to get your money or replacements sorted out.
Alan

2
Yes very good but not so cheap to buy here in the UK.

3
Have just finished machining this and as you can see in the picture there are still lines if I machine this way, it was machined from bottom to top at an angle of 315 degrees using a brand new 1/8 inch taper ball nose cutter that I bought from USA (Think and Tinker) I am now going to go and check the meshing as you have suggested (Gerry) the lines at the bottom of part are not very visible on picture as the wood there is lighter that the other side.
Thanks
Alan

4
Gerry
I am just done another program using Aspire and am doing the roughing cut using the "Z" level strategy and  am using the Raster for finishing cut at a 315 degree angle and so far no lines have appeared will let you know what the result was like when finished, also had a look at the meshing but cannot see any problems there but after I have finished this job I shall take another look just to make sure there is nothing there.
Alan

5
It has a reduction drive on the machine 4:1 ratio
Alan

6
Gerry
I took what you said on board and checked out the rack pinions for wear/backlash and could not find any problems there but I did have on the shelf some unused pinions of the same size but instead of being metal they were made of Glass-filled Nylon so I machine and fitted them and was quite surprised just how quiet they made the machine not that it was noisy in the first place but then came the problem, her indoors you know the one she who must be obeyed needed some help so never got round to finishing yesterday so have finished it off today and set about machining a basic 3D model done the roughing and finishing using the raster option and the same tool for both and was dismayed to fine that I still had lines very similar to the ones in my very first post on this problem but a lot fainter, so then I just decided to do a finish tool path(over the same part) but this time I used the offset option again using the same tool and you can see the result, perfect no problems at all doing it this way so tried again using the raster option but still get lines but as I say a lot fainter than before so I can live with that and just sand those marks away so not sure what happened by fitting the new pinions but it seems to have done the job so now I am very happy ;D.
A very big thank you to all who had some input into this and to Gerry who gave me eventual answer.
Many thanks
Alan

7
Yes it is rack and pinion and have checked for any play in it but have found it to be spot on and no the drives did not come from them, the arrow is pointing towards the "Y" axis so I will check all racks etc. later today as it is very late now and it is past my bed time and I do need some sleep right now, will let you know if I find anything.
Thanks
Alan

8
Just a quick update, Gerry asked me if I had machined the wood using the offset option and that I should try the raster option but as I said I was machining using the raster option so today I thought that I would have a go at machining just a dish shape using the offset option and I thought that all was going well until the end when I noticed that I had some horizontal lines at the top and bottom of the dish so I done two more finish tool paths going down a further 1mm (0.03936996 inch) and although it looks better the lines are still there and it just seems weird that the lines run parallel when the part is machined in circles, take a close look at the picture the lines are not that bad now but I have machined the part 4 times to get it like it is now, also what seems strange is that the lines appear at the top right of part and the bottom left the arrow shows the direction tool was cutting. 

9
Wood is fixed very securely at one point when this first started to happen I even screwed the work piece to the table just to make sure that there was no flex in wood, as for thrust bearing although this was a brand new motor I did check the bearings etc. just again to rule that out, the wood is that you have in that picture was a very soft pine which is not the best of wood but that is what I had lying around as for the other pictures in this thread that is Oak and I have used other woods hard and soft still get the same problem,
Alan

10
Hi Dave
I have tried taking off more on finishing cuts but it does not seem to make any difference, believe me I have just about exhausted all my options with cutting at this depth and feeds and spindle motor speeds I still seem to get the same results but I have decided that if I do not get any results after I put it onto the Vectric forum then I shall take the complete "Z" axis off of gantry and while that is off reinforce the gantry in the places that I think was Craig suggested then remove the 5 axis head unit and then fit the spindle motor back to the "Z" axis and try again and see what happens if that fails then it might be time for the large very large hammer to make an appearance ;) and see if that frightens the machine into working properly.
Again thanks for everyones input very much appreciated.
Alan

Pages: 1 2 3 4 5 6 7 8 »