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23-08-2010 #1
Hmm! can't quite make out whether these will cause friction,the washers at the outside of the bearing will rub against the rubber housing and cause some degree of friction.
Personally the washers shouldbe the size of the middle outer bore with at least a 2mm gap between support and bearing.
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23-08-2010 #2
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23-08-2010 #3
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23-08-2010 #4
Hi mate, I think ideally you should look at re doing the axle stud, only this time start with larger stock and turn it down leaving a nice set of shoulders for the bearing inner race’s to home to. (Sleeves with shoulders)
The rubber shields on the bearings will turn but its not ideal and they could end up jamming..Me
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23-08-2010 #5
I'm also guessing that those bearings are 8 to 9mm wide? if so that spigots bearing spindle is far too wide and will cause the bearing to side travel.
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28-10-2011 #6
Been playing with Sketchup to see what my router will look like. Think I'm going to have to beef up my long (X axis?) rails as the gantry is going to be heavy...thinking about it might have to lighten it a bit else the stepper will struggle. The base is 1000mm x 500mm, box is 40x40x3 steel, plate is either 3mm or 6mm steel (all used as available from my works scrap bin!)
Comments???
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01-11-2011 #7
Been playing a bit more with Sketchup and added the spindle (see seperate thread for details on the spindle as designed by blackburn mark http://www.mycncuk.com/forums/showth...shless-spindle) steppers, leadscrews etc...
The more I look at it the more I am going to have to re-design the gantry as at the moment it will be too heavy. Will have to apply the KISS principle I think...
Below is a quick walk round video exported from Sketchup.
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10-11-2011 #8
Been chopping up some Delrin for lead screw nuts tonight, couldn't find my chop saw plastic blade so used my mitre saw instead :naughty:
Will finish off the round nuts in the lathe tomorrow lunchtime and finish tap them and also drill the white delrin and tap that as not sure which ones I'll use yet.
Hopefully my boring bar also comes in the post tomorrow as I can't wait to carry on with my DIY spindle
Still playing with my design...:whistling:
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10-11-2011 #9
i always use my mitre saw on delrin that i cant get to with a slit saw, a bit of elbow grease LOL.... id almost forgot what that is
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16-05-2012 #10
Well after doing nothing on this for months I'm going to cheat and use MDF to make the gantry sides (yes I know I know!!!) to get the project back under way as I'm spending all my money on RC helis. Then once it's working I'll use the machine to make upgrade bits for itself. The second router is already in the design stage, going to be a supported rail, twin leadscrew design...
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