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Folks,
Sorry for the delay. Long story short, after converting my bearings to a MGN15 Linear Rail I had discovered that I had to fortify my gantry by adding web gussets and replacing my belt...

Peter,

Thanks. I plan to complete my retrofit this weekend. After making the necessary adjustments I'll take these measurements and publish them here. Perhaps these measurements can serve as a...

Peter,

That data is exactly what I am looking for. As mentioned, I have only replaced my X-Axis bearings and have seen a huge improvement, as I can see the flex is being caused by those cheap...

Peter,

You are a wealth of information. I recall you sending me this document before. That is why I invested in the series of spring scales and run-out gauge. On another thread, I read of a...

Craig,

Thanks for that tidbit of information. I use 12mm diameter round rails for my Z which flexes under any slight load. I have a Newton spring scale that goes up to 30N. I built my own CNC...

Folks,

Allow me to preface this question with my situation. A few years ago, I started building a CNC Router table. It started out as a modest design with a 4'x4' table using a low-cost Delrin...

I need to make a clarification. When I compare rack and pinion, I am referring to a straight spur gear and not a helical gear and rack which has a superior surface contact with the gear teeth.

Servtech,

I too am on the belt team. I also concede that a ball screw mechanism provides maximum precision, but claiming that a rack and pinion system is on the same level as a ball screw is pure...

I beg to differ. Most modern timing belts use Kevlar cordage which resist stretching even under extreme loads. The major drawback with belts is dealing with vibration and resonance. - Rick

Both 8020 and 8040 stiffness and strength are dependent on the extrusion type, as you can find each in thin or thick wall. However, I do agree that neither of these extrusions (regardless of thick...

I understand this thread is almost 10 years old, but I need to provide caution. DO NOT SET PD004 and PD005 TO 60!!!!!!!!!!! SET PD004 and PD005 to 400!!!! You will burn up your spindle! if you use...

Wow! I love how you repurposed that PC case. That is very clever. The only thing I would change would be simplifying the dust collection line. I think suspending the hose from the ceiling with a...

Thank you for that document. There is a lot of good information there.


Regards,


Rick

I would like to add my 2 cents to this conversation. I would like to preface my response by weighing the pros and cons of each system.

I start with the ball screw transmission which is...

Awesome design! It's nice to see people thinking outside the box.

Johnny,

I enjoy your design. I am curious about your linear guide bearings. I assume they are the recirculating ball type? I use these (9mm size) on my 3D printer with satisfying success. Until...