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I would suggest checking the brushes first, also take a look at the commutator to check for wear.

Nice work!

Are you manually rotating the turret to check the encoder outputs? That would be my first step. And I wonder whether the COM pin on the FX3U needs connecting to 0V perhaps?

I bought a 4 pole spindle as they were available as a constant power type, couldn't find those in a 2 pole type. It's proved to be a good choice giving more torque at lower rpm meaning you can fair...

Try Sunfar, they do a range of VFDs that go up to 1,000Hz in both single and 3 phase. I have an E300 on my spindle and it's worked well for over 18 months. BTW what spindle are you using plse? I'm...

One thing that can help you sometimes is tooling plate. This has reasonable accuracy in both thickness, flatness and the two sides being parallel. But there will likely be some parts where you need...

I've had one from Arceurotrade and it was OK. I've also had some from E W equipment & GBR Engineering and they were good too, and very quick delivery to boot.

I will do - when I can find some premises large enough to accommodate the machine, but am currently being shafted by COVID, the LDNPA and urban millionaires buying up all the property round here.

Theoretically - I worked out the energy in the moving system then using U = 1/2*C*V2 calculated the voltage rise on the cap.

There is sometimes an advantage to being able to move the spindle up and down on the Z carriage a bit to accommodate different cutter lengths provides you have clearance.

Glad to hear it's working again - sometimes practical considerations are far more important than reaching ideal theoretical solutions!

Check out the "Nano coated" cutters from APT - I found they work very well on steel if you have a spindle that doesn't give much poke at low speeds.

The papers I read seemed to say that the major deciding factor was the % of mineral filler, and then the particle size distribution - you seem to need a fair % of small stuff to keep the minimum...

Being intrigued by this I went digging and found the thermal expansion coefficient. It will vary with the mix (more epoxy = more expansion it seems), but typical figures are 12...16 x 10-6/deg C....

Very sorry to hear that Gary, you've always seemed to stock quality gear and made useful contributions to this forum.

Another wee tip for you: check the info on the spindle you're going for as to where you're allowed to clamp it. I didn't and when I read the manual I found that my original idea of being able to...

[QUOTE=diycnc;118473]
I painted the frame too, blue Hammerite spray paint, and the paint is so soft I can scratch it off with my fingernail! I clearly didn't do a very good job of cleaning it before...

How square do you find it cuts please? I've been thinking of buying something similar for a while, albeit maybe a tad larger.

One thing that might help (if it goes to the sort of angles you're looking for) is the Vectric chamfer plug-in/widget or whatever they call it*. It's meant to be able to cut chamfers of any arbitrary...

Well sort of.... The direct fixing of the rails thing was more aimed at how you're spacing the front and back Z plates apart. Currently you have the carriages fixed hard onto the back plate, and then...

Tip: if you can add some bits of bar to stiffen your Z-plate (i.e. turn it into a channel section) you will do better cost for cost than a flat plate. For example a 10mm plate 180mm wide with some 30...

Setup 2 is much more realistic since you want to design for decent performance when the cutter is hanging down a fair way below the gantry, 'coz that's where it will often be used. Having an equal...

After a couple of delays due to other stuff I finally had the opportunity to have a go at it today, and I have to say I'm impressed with the APT cutters. Sequence of machining was:

1) Turn down...

I did this on a number of cables on my machine where there wasn't room for a junction box to good effect - I used adhesive lined heatshrink for the overall cover. Just be careful to visually inspect...

You're not wrong there. When I wanted a couple of high quality AC bearings last year I found that the cheapest way of getting them was to buy a high spec. (FBT) BK12 from Fred @ BST and take the...