Or this? Sorry, bit of a shameless plug for my own stuff
And within a few minutes we have putt together the āChain Guide Wikiā. I love this place.
Iād be really careful about how you source those bobbins, at least wait until the owner isnāt home.
Maybe āMaslowā a sewing box in exchange?
I think ->Jackie<- deserves a mention here. I was going through my scrap and/or collectables when she asked āWhat are you looking for?ā and I explained that I need something round that can turn, to help guide the chains. She disappeared and came back with bobbins. Not so easy to change them now, even if I wanted to.
and itās obsoleted by running the chains acros the top beam
That is correct. The new solid riser assembly eliminated any āsnappingā of the kit.
Sanding and polishing of all parts and washers got rid of āthe rough edgesā, providing smooth move. Tightening the screws needs a sensitive touch, hard enough not to wiggle and loose enough not to block. Note that all my parts have a slight bend. For the horizontal arms I made sure they all ācurveā in the same direction while mounting. The vertical arms are mounted mirrored, so one would curve down and one would curve up. A little hammering with a rubber hammer straightened them.
After moving around with the arrow buttons, I would say I have nice and solid kit and am ready to explore the unknown depths of triangular kinematics.
Not necessarily, itās motor mounts can still extend beyond the beam, or the counterweight pull at an angle. Watching the way the chain meets the sprocket is still important, and positive control is not a bad idea.
looking forward to accuracy tests (and you should have received the new
kit today as well)
Iād like to see you re-test the old kit with the full riser
possibly a second test using the new center bar with the old kit
and then finally with the new kit.
If you need me to send you money for plywood to cut on, let me know.
David Lang
with the chains running horizontally, there is far less of a problem. the
counterweight is not pulling at nearly the same angle. The weigh just doesnāt
have the lever arm to move things out of place.
k
Wow, unexpected happy news
Iāve spent the the Friday sanding, LOLā¦
The washers will be reused
Shiny armour!
Edit: The sled is resting on a chair, so ignore angle of the kit!
- Run an alternating CW/CCW pattern without bit (is to ābed-inā the correct term?)
- Run new calibration with a warmed up Maslow. (Is there a recommended FW/GC combo? Iām always on the bleeding edge āmasterā)
- Run accuracy test
No warnings in 1.03 or 1.07. Nothing in the logs. I put the weight back, as @MeticulousMaynard runns heavier then me and I have not seen this in the past. Going back to 1.02 now, to check
The sag in direction of the cut at the top with F1000 and a 16.4kg sled is still there with 1.02, 1.03, 1.07.
One thing that hasnāt been considered is your 12V supply. I had a similar issue and it was the 12v supply that caused the problem. I swapped in a larger supply and the problem disappeared. If you work out the physics, the chain tension is highest on the top of the sheet leading to the highest amp draw by the motors and if the supply is starting to get weak it will lead to strange problems. If it is a voltage problem, then components that can cause the problem are: the supply, the driver board or a bad motor or in your case one bad motor ( you could swap the motors to see if the problem reverses or changes to isolate out the motor as the issue). Have the motors ever gotten usually hot ( greater than 185 degrees for an extended amount of time, 30-45 min.)?
This may not be your problem, but it is worth considering.
Thanks for the input. The power supply is definitely worth a try. Good thing is, I have 2 new motors, 2 old motor shields to rule out things. Since I can mirror the error exactly by simply changing the cut direction, I think this excludes one motor. Lots a tests to do and no time. Will squeeze it in somehow.
Can one of the programmers please tell me in what file I can find the hard-coded max feed-rates in old versions, like 0.68 and 0.76?
Voltage is easy to monitor with these cheap two wire meters. Donāt know how hard they are to ship to Bahrain.
My kid was over your way, in Dubai for a couple days on her way back from Kenya. 14 and a half hour flight home last night on an A380.
Random example:
But I like those and have not seen them. A bunch of them will find homes in various projects.