Help (pics incuded)

[tom10122]

Idk whats going on but with the optos jumped the skew goes one way, with out them jumped they go the other way .I didn;t print the one with the jumped optos for long after i started to see it skewed. ANy ideas ? I've run out. My belts are all tightend that it was hard to get the belts back on. so its not that, i noticed that there is some wiggle on the extruder carriage, the screws to tighten the bearings are tightend as much as possible.

[Fiero2M6]

It looks like jumping the optos did something positive. Before worrying about the electrical stuff more, I'd double check the mechanical movement. If you disconnect the belts, everything should glide smoothly (without any vibration) when nudged by hand. Also, belts should not be so tight that they load the frame.

[tom10122]

thanks, maybe i will loosen the belts a bit, my extruder chassis has quite a bit of wiggle even though i tightened the screws on it , any tiips?

[Fiero2M6]

What type of bearings do you have?

[tom10122]

i have the plastic ones

[kilroyo]

I had alot of issue with printer skew when I first built my printer, and the whole issue turned out to be the old computer I was using. Just to rule that being a possibility I would try running the printer from another computer. From your pictures thou it doesn't look like the issue is skew. Try printing a calibration cube. They have several of them over at thingiverse. If its skew , each layer will slightly be offset and the whole thing will be tilted. Pictures arent very clear thou

[michaellatif]

i have the plastic ones

This could be part of your problem. If you still have play in the extruder carriage then you will have signs of backlash in your prints.
I recommend upgrading to the metal bearings for all of the rollers, carriage glides and idler bearings.

I used R4A-2RS for all of my idler bearings and printed out 18 tooth sleeves (this part is completely optional) to allow the belts to glide easily over the bearings.
http://forum.seemecnc.com/viewtopic.php?f=35&t=471

The carriage bearings are R2ZZ, the upgrade kit available at seemecnc.com is basically what you want.

These two changes will help with backlash and remove almost 100% of the play in the carriages.
The other alternative is to upgrade to the brass bushings that is available on the indiegogo campaign.

Also as kilroyo said, your pics are not too good. Post clearer pictures and we can better help determine what maybe wrong.

[Fiero2M6]

The plastic bearings will work, they just take some fiddling. After putting mine together, I ended up disassembling everything and sanding the axles to allow the bearings to spin freely. When adjusting the set screws, it took me a lot of fiddling to find the sweet spot. Its also important to remember that the bars the bearings glide on must be parallel.

Some better pics would be helpful.

[tom10122]

heres another

[michaellatif]

Dude, I can't tell what that is. Try focusing on the object, the background is clear but the object itself is blurry.

[tom10122]

sorry, used a webcam, ill try again on the picture, the extruder kinda jiggles when it moves

[drkow]

When I had skew like that it was because my travel speed was too high and the motors were skipping when travelling.

[michaellatif]

SeeMeCNC have awful customer service! Avoid these guys and buy from a more respected vendor like makergear or lulzbot.

@drkow -
I have and I am pretty certain I can speak for the rest of the owners of H-1's, have never had any problems with the folks at SeeMeCNC; they have always been responsive, give out their personal phone numbers and are quick to resolve any issues. Your signature is offensive, I request that you remove it.

Regards,

Mike

[Thumper]

I agree Mike it is pretty petty and offensive. We get it Dr. you didn't get one of the heated beds. You will notice I asked to get one of the extra's also. When it as all said and done I missed out. Did I write damaging comments about the Seemecnc crew like you? No. You snooze you lose. Get over it.

[dougmsbbs]

I second Mike's request.

I've never met anyone who enjoy supporting what they sell as much as the guys at SeemeCnc do.

Douglas

[Thumper]

thank you Drkow. And thank you for the links to the Arduino wiring instructions.

[drkow]

Good to hear that most people are getting good service.

My first order came with missing screws, and a broken driver board.

Then I had one good order for a nozzle.

I just put that signature up for a few days so that the SeeMeCNC folks would finally reply to my e-mail and send me a refund... it worked:

~ SeeMeCNC ~ [email protected]
Jun 25 (7 days ago)

to me

Sorry for late reply. We have heated beds on order and expect them shipping by end of the week. This is coordinated with the Indiegogo campaign.

I expect them shipping late next week. Updates will begin to show up on Indiegogo campaign soon, then in-stock all the time on our on-line store.

Thank you,
Steve


On Mon, Jun 11, 2012 at 9:31 PM, <@gmail.com> wrote:
You have received a contact request from a visitor to your storefront at http://shop.seemecnc.com:

Hello,

I ordered a heated bed using the indiegogo campaign before they were posted on the shop. Can you send me one of the heated beds from the current batch? I'd like to start using it ASAP! How much do I need to pay for uninsured shipping to Canada? Thanks!

Two whole weeks to reply to my e-mail isn't very good service.

This is after I asked twice on the forums if I could preorder a board to ensure I'd get one from the first batch. After I saw the heated beds posted on the web shop, I emailed them again, and sent a private message to John on the forums (which he never replied to). Instead of shipping the boards out in the order they were paid for, the SeeMeCNC folks only shipped the web store orders and put my order (the first one!) on the backburner for 1+ months until another batch is manufactured.

I love my SeeMeCNC printer and it was a great deal when I bought it 6 months ago, but now with the price increase it's no longer a good value and for the same money you can buy a better printer elsewhere.

[tom10122]

Actually there is only one competitor for the h-1 and it is SLOW and not even selling yet, the makibox is 350 shipped but it is only capable of printing 100mm per second while the h-1 can do 1-2 thousand . There really is no competition. Back to the issus though, i wasn't going that fast though, maybe 500mm/sec I'm debating getting a bearing upgrade.

[jcugnoni]

Hi Tom,

I also think that your problems are due to play in the X/Y axis linear guides. I had the same issue with my plastic bearings and could not solve it simply (outer diameter of the rollers was a tiny bit too small and I could not compensate the play with the adjustment skrew). So to solve this, I would either suggest the ball bearing upgrade or as a temporary fix you can print linear bushing as shown here: http://forum.seemecnc.com/viewtopic.php ... rade#p1951

Moreover the idler bearing upgrade is also close to mandatory in my opinion. It is very difficult to have no backslash with the original plastic idlers.

Last point that can fail on the mechanics side: when themotors are getting hot the toothed pulley may slide on the stepper motor axis. This was a typical probelm for me when I had the plastic rollers/idlers. I had to tighten the belt to remove backslash but it increased friction so much that the pulleys were just randomly sliding on the motor axis.
With bearings it has more or less disappeared, but I have added some loctite to stop this potential problem.

[tom10122]

I've been looking for that! I saw it before but couldn't find it again, I'll try to print it . In the mean time what do you guys think about putting a teflon tube with a 6-7mm diameter between both sides of the x-carrige. To me it would help it a bit as long as the tub moved easily. I'm also gonna try to print out those bearings.