hi Sorry my english is not so good my question is it possible to use a 12mm acme lead screw in c-beam because the 8mm 1m long are very soft i think one of mine already bent a bit thx for support
Lower cost. The main issue is verifying that you can mount the lead nut to the plate and have the mounted assembly fit into the limited amount of space inside the track. You will need to custom machine some of the parts to achieve this. DumpsterCNC is a good source of information on the potential size of the fittings.
Ok thx I think the 250mm and 500mm 8mm acme is good But the 8mm x 1000mm acme is to soft So I want to check the 12mm
Hi. Did you find the 12mm x 1000mm Lead Screw ? I'm looking for a 4 start one (nut move 8mm per turn) but can't find them at a reasonnable price ! Very strange they sell 1m long 8mm screw witch is very soft, but hardly sell 1m long 12mm ! Any advice or seller on Ebay or bangood ?
Are you using the 1000mm TR-8's in tension? i see many people do them in compression when tension is much better. It is a matter of using the collar on the outer end instead of inner ends, but you might not have length to do so.
I need tension but also compression (actually the compression is more than the tension). I have no way to do something else. I have a lot of compression when the screw is driven at on end and the nut at the other end, 1m far away ! So of course it tends to do something like this : (I don't know how it's called in english, maybe buckle, flambage in french)
what I am referring to is where are your collars on the rods? are they on the inside of the bearings blocks (always the rod is acting in compression) or the outside (always in tension)
You might think I'm using the screw as normal use for 3D printer but I'm not. I'm using it to open and close a window, so I'm using it as to make a cylinder
Ok! yes you need a bigger screw for side and compression load then! I work with some big ones at work An option would be to use springs to keep the compression off the actuator..
Yes but the most compression needed is at the end when the distance is the biggest when the spring would be almost free ! Any idea if it's possible to find some 12mm screw with8mm move per turn ? I found some but with only 2mm move per turn !
12mm is far stronger, I can supply TR12x3 with anti-backlash (POM) nut and mount that fits into standard C-Beam, but will need modified X, Y and Z plates, I can supply those too if needed or you can alter yours, but the plate design is not openbuild so please don't ask for the drawings. Send me a private message if interested, oh, I also provide a TR16x4 solution but these will not fit into C-Beam so you need to factor that in, again I do have X,Y and Z plates for this but again they are not openbuild so no drawings. Send me a private message if interested. Dave.
Any back lash nuts that use this lead screw and fit in the C-Beam? Is it possible to cut down the one that came with it?
You’ll probably need to make your own. The brass ones will have too much play. You’ll probably want something in Delrin that you can make to be anti-backlash. Look up Matthias Wandel’s Making Wood Thread Taps on YouTube.
I got the ballscrew not the acme one. ZYLtech 12mm 1204 Antibacklash Ball Screw w/ Ballnut - Pre-cut lengths 250mm-1000mm
Would you be able to supply the Anti-Backlash nut that attaches to the Gantry Plates on the LEAD machines, that fits a T12x8 ACME lead Screw? (4 start 2mm pitch) ??
I don't have a T12x8 Tap to re-thread the nuts, but if you can source one, that would be the easiest way to fit what you require.
Make your own tap from a piece of the 12 mm screw if you have leftover. When I built my CNC router I used 1/2" - 10 five start screws and just took a short piece I was not using and made a tap. Making Taps for 1/2 inch and 3/8 inch Acme precision rods
