jv
New Member
Posts: 49
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Post by jv on May 11, 2020 13:14:37 GMT
I noticed that after running my 4th axis for 3 cuts, what I thought was enough tension on the belt- was not enough. I would suggest that people readjust the tension on the belt after 1 or 2 cuts. The easiest way I found to do this is to use a big flat head screw driver and put it between the motor and the 3 jaw chuck. Turn it side ways to create more space between the motor and chuck to create tension on the belt. My belt is fairly tight now with very little slack.
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recklessdriver
New Member
MegaV Plasma/router hybrid owner with a lot to learn
Posts: 24
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Post by recklessdriver on May 11, 2020 15:11:22 GMT
I completed the assembly of the 4th axis. This spring was packed loose in the bag of 4th axis hardware. Anyone know what it's for?
I think I figured out the question of where those last two screws go. Right behind the tail center to lock it in place along the track. As a tip, I made a little bent sheet metal bracket that is captured by these two screws but loosely floats on top the tail stock carriage and folds under carriage plate so the screws bind against the sheet metal instead of directly against the aluminum tail stock rail.........this prevents the rail from getting all scarred up by the binding screws.
Best, Kelly
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Post by brianrussell on May 11, 2020 16:10:11 GMT
That spring came on the chuck key. I think it is worthless personally. Just makes it harder to keep the key engaged into the chuck. Maybe the idea is you can't forget to leave the key in the chuck?
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recklessdriver
New Member
MegaV Plasma/router hybrid owner with a lot to learn
Posts: 24
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Post by recklessdriver on May 11, 2020 18:09:11 GMT
Would never have guessed that. Into my miscellaneous spring assortment it goes. First thing my father taught me when I was 12 standing in front of the lathe is the chuck key only is allowed to touch the chuck when you are loading or unloading a part, else it belongs in the holder on the side of the machine, but otherwise never in the chuck! -Thanks.
Best, Kelly
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MajorFrantic
New Member
Mega V 35"x35", 4th Axis, 44w OctoPro Laser
Posts: 33
Location: Nashville, TN
Machine: Other
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Post by MajorFrantic on May 15, 2020 17:05:23 GMT
That spring came on the chuck key. I think it is worthless personally. Just makes it harder to keep the key engaged into the chuck. Maybe the idea is you can't forget to leave the key in the chuck? It's the last one.
Helps those with forgetful memories or bad shop practices. People forget and leave a drill key in the chuck. Power gets applied and instant missile, jam or breakage.
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Post by trialnterror on May 23, 2020 3:15:05 GMT
I completed the assembly of the 4th axis. This spring was packed loose in the bag of 4th axis hardware. Anyone know what it's for?
Yes it goes on the chuck key so you don’t accidentally leave it on the 3 jaw chuck. On a lathe if you leave the chuck key on and start the lathe at 3000 rpm you’ll have a bad day!! Basically: SAFETY SPRING!
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Post by trialnterror on May 23, 2020 3:19:13 GMT
youtu.be/X0Yuqvr-9QwJust a quick video I did on how I assembled the 4th axis! I used a foreign T.O. (technical order)
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Post by dare2make on Dec 18, 2020 1:37:32 GMT
What is the max holding diameter? I didn't think of a good way to answer your question exactly, but here is a picture of the jaws at what I think could be at their max open stage and still rotate. Note that there are two sets of jaws included. One for smaller items and one for larger items. One set of jaws I based on the looks of it is designed to grab from the outer diameter. The other set of jaws is for grabie grabie on the inside diameter like a tube for example.
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gkb
New Member
Posts: 1
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Post by gkb on Dec 30, 2020 16:28:31 GMT
Thank you for all the info, great stuff. Got mine put together with this help. Now I just need to figure out how to run it... lol
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Post by cnc4fun on Jan 17, 2021 21:37:47 GMT
I haven't gotten my 4th axis together yet but having played with the chuck a bit -- maybe a dumb question, but how to get the jaws lined up so that they are centered (meet / align correctly when fully closed)?
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Post by jpjavery on Jan 24, 2021 15:42:04 GMT
Awesome post!Wanted to give a quick "thank you" for starting it. Finally put together my 4th Axis, looking forward to learning how to use it!
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Post by cnc4fun on Apr 16, 2021 2:12:26 GMT
Answering my own question in case it helps someone: The jaws are numbered an so is the chuck. They need to be in the correct positions or they cannot be centered.
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Post by stitch0852 on Oct 28, 2021 11:11:24 GMT
Thank you very much! This is my next step, assemble fourth axis.
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Post by stitch0852 on Oct 30, 2021 19:26:44 GMT
I installed the screws holding the motor on from the motor side. Getting a wrench or anything on the nuts to tighten was a nightmare with them on the motor side. The pulleys for the belt are far enough away to allow plenty of safe clearance for the belt to turn with the nuts there.
I also assembled the tailstock end with the adjustable v-wheels to the front of the machine instead of the back for ease of accessing, should I need to.
There was nothing in the kit to allow mounting it to the T-Plate bed. The button cap M5 left over are too long and stick up interfering with the wheel movement when adjusting the tailstock end and do not tighten fully down. Maybe need 12 or 16mm length. will pick some up tomorrow, if they have in my tiny rural town.
It is possible to extend the length by loosening the two bolts that hold the extrusion to the bedplate of the 4th axis assembly and slide to the right until the closest to the head gets near the end of the extrusion. That can extend the length a little bit more.
This worked pretty well for getting it assembled. Thank you!
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Post by refineddesign on Jul 2, 2022 23:46:36 GMT
I just assembled my 4th axis, with some help from this forum! Thanks, one question about mounting: is the 4th axis hard mounted anywhere or just free floating? If it is free floating, does anyone have any tips to ensure you have it zeroed in the same spot every time so you don't have the off chance of milling a crucial part of your 4th axis? Thanks for all the help, can't wait to get started with my mega v xl!
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