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- Pader's instructable Cutting a Step for a Bearing on a Long Lead Screw's weekly stats:
- Pader commented on Pader's instructable Cutting a Step for a Bearing on a Long Lead ScrewView Instructable »
I have already published this instructable but wish to add it to the CNC competition but do not have link to do so.
- Pader commented on Pader's instructable GOOD QUALITY CNC MACHINE
dropbox link sent
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Sent with a dropbox link. Please let me know if you received it OK
View Instructable »Obviously, threaded rod is a hardware store item and you cannot get complete accuracy from them, but the cost of that length of lead screw is prohibitive. You pays your money and takes your choice.However, losses can be mitigated by using the step function of the motors and over 1800mm average out the losses which are pretty small especially if you take care of backlash.
- Pader commented on Pader's instructable Home Built CNC Machine Part 1 - Supported Linear Rails
My only suggestion is that you buy one of the many versions of mini-lathe that can be found on ebay. My one was purchased from Amadeal Ltd and has served me well. The one caveat is that you will need to go right through the lathe and tighten the whole thing up and adjust the slides and lead screw cap as not too much attention has been paid during manufacture. I would also recommend, to increase accuracy, that the built in tray is fixed securely to a heavy steel base.I would also recommend that you replace the nylon main drive gears with metal items which though slightly noisier will not cause a catastrophic drive failure as occurred on my machine.As to accuracy, the only way that I know of is to fit a 2 axis DRO of which there are plenty on ebay with 5um (or 1um to special order) resol…
see more »View Instructable »The support extrusions may not be all that easy to locate, but as i suggested, a couple of cheap, surface ground spirit levels at 1800 long will do the trick.I have the machine stripped down for a rewire and fitting of coolant plumbing for the work piece and the spindle at the moment
- Pader commented on Sergey_EnduranceRobots's instructable Diode Laser Etching of a PCB. DIY From a to Z.View Instructable »
I have made a number of instrument fascias using acrylic sheet using automotive, matt black spray that my laser etcher burns through easily. It has the advantage of drying quickly if laid on in one or two light coats (hold it up to a light source to check coverage between coats). In the case of the fascias, I gave a light spray with a white compatible spray over the etched areas to achieve professional quality fascias.I have no doubt that the same technique can be used for PCB etching but obviously, omitting the white spray part.
- Pader commented on Tom McGuire's instructable Easy to Build CNC Mill Stepper Motor and Driver CircuitsView Instructable »
I have been theorising on building a numerical position display on my CNC machine using an up/down counter. Could you enlighten me as to whether the DIR+ and DIR- signals to the stepper drivers are at the same potential or is one signal the absence of a 'high' level?
- Pader commented on vreinkymov's instructable PCB Etching Solution - Cupric ChlorideView Instructable »
This is a useful link for chemical compatibility too: https://www.coleparmer.com/Chemical-Resistance
- Pader commented on A Whatmough's instructable Getting Started with HSMXpressView Instructable »
Hello,I have HSMXpress loaded and registered into Solidworks but I can find no trace of it in the menu system. There certainly is no 'CAM' tag.Can anyone set me in the right direction?