Why is the bed sprung?

Hi All,
Ive done a search, but couldn't find an answer, so here is a question:

Why is the Bed on springs? I have a Huxley from RRP, and I cant see the need for them.

Anyone know why?

Dave

Easier leveling I believe.

... more for a little chance to survive minor 'head-crashes' due to positioning errors ... or the nozzle ploughing through excess plastic

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Viktor
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If they *really* want to make it convenient it should have has thumb wheels though. Nophead mentioned that his bed is mounted rigidly.

I have designed rigid attachers for my heated bed. However, i kindah want to measure the effect of the bed with the springs first. Trying a hollow block with just 1 perimeter, hoping to see wobble on that perimeter, but get blobbiness on the corners instead..(And the effect of wobble seems really small, so i might not even try the rigid attachment..)

Anyway the rigid version is much less easy to calibrate, basically you have to mess with tape.. I suppose i should have tried a trapped-nut approach to rigidly attaching, but i dont think it needs to be calibrated often. Usually it goes out of calibration because the two z-threaded rods arent at the same height,which can be fixed by rotating them manually.(Carefully, with the motors off.)

In the Z-direction there are already springs. And collision the x and y direction with the bed should be avoidable by moving the x-endstops and getting the firmware limitations right.

I looked at the newer reprappro version, and the springs under the bed seem to be shorter.

Guess Ill spend an hour or so in front of the lathe later and try it.my bed seems to move loads and levelling it is a pita.
Dave

Multiple times I have homed Z and old plastic/drool that I had forgotten about caused the nozzle to compress the bed springs slightly. I wouldn't like to think what might eventually snap if I kept doing that without springs.

I have a nyloc nut trap bed mount on Thingiverse for the RRP Mendel - perhaps it will work with the Huxley?

Andy

I don't use springs on the bed. Leveling is achieved. by using M3 cap screws and nuts as a stand off that is adjustable. It's leveled as with screw jacks on shop equipment. For me it's the quickest, easiest way to do it.

I thought that springs on the bed were deprecated when the designs went from a double bed to a single bed (plus heated bed. I've landed the nozzle on the glass a few times fairly violently but have yet to break a piece as the heat bed and glass do flex somewhat.

I use the springs to soften the nozzle crashes

it occurs often, even being cautious.

vegasloki Wrote:
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> I thought that springs on the bed were deprecated
> when the designs went from a double bed to a
> single bed (plus heated bed. I've landed the
> nozzle on the glass a few times fairly violently
> but have yet to break a piece as the heat bed and
> glass do flex somewhat.

Agreed. I'm much happier with my printer now that I've ditched the springs.