Main goal for this layout was smaller overall XY footprint. Easier squaring and assembly.
Didn’t realize printed part temp is the limit, and not stepper. Using ASA parts solves that for most higher temp materials, IF people planning to print high temp material. Am ignoring v.high temp like Peek.
Me neither. I haven’t thought about 4 way shield, e.g. left and right X blinds, and front/rear Y blinds stacked on top above the belts attached to edges and core.
Reducing energy needed to heat chamber for higher temp materials. Minimize or avoid chamber heater even.
I sit close to the printer, the room gets hot during long prints.
Edit: Just remembered keeping regular steppers below 80c helps avoid magnets demagnetizing, good for longevity/performance? Didn’t realize we’re using high temp rated for 180c.
We are not using any special steppers. I have no idea what they can handle I am sure at least 80C. I can’t imagine you would try to actually keep your chamber at 80C?, what do you need the chamber temp to be.
As I said we are not making this as a extreme chamber but I am trying to accommodate your wants. So what is the chamber temp you want to use for ASA?
E-Brake update. The relay seems to work perfectly. The steppers power on just fine and work as expected. Kill the power and the are still holding. It seems the relays power down before the SKR by a split second. I feel zero drop at all except the slight give it has after power down, the smooth slide.
We are going to call this Plan B, Mike has another idea that could be even better. I will open another thread to discuss it there. E-Brake for Belted Z axis
No we can still cross them in the back. We can put a stepper anywhere there is currently a idler. we can even add one in random places as long as it is not where the belt is variable length. (we can add one in the middle off the side if we want)
I just tested it shorting one coil on one stepper with a 16T pulley it hold 4 lbs, it holds 5 lbs for a couple inches then slips.
So with one “brake” on each Z stepper we can easily hold 4 lbs each.
Shorting both coils should hold more (nearly double?)?
So we have a target. your bed stack needs to be under 12 lbs or you need twice the brakes.
I just weight 3 steppers, 305x305mm 1/4" aluminum plate with a header and am sitting at 6.5lbs. (how the heck is your bed more than twice that JJ?!?!?!)
I think staying under 12lbs should be fairly easy for a standard build.
add another 1/4" aluminum for the brace, and at the 10.5 lbs I had a 310x320 glass bed on there as well. I did weigh that separate and its 2lbs on its own. That’s off now so I should be at 8.5lbs lol
You need to cut some speed holes in that brace…and we need to find a glass substitute. Although an extra $7 gets you more brakes…so either way it is not a big deal.
