Kitty: Thanks for your input to Karl and all of us. Maybe the following will
help you too. Tom Richards, Metallurgist
>Date: Fri, 23 Oct 1998 22:20:29 -0400
>To: "Denton, Karl R. KD1588" <KDenton@williams-int.com>
>From: Tom Richards <thoms@ici.net>
>Subject: Re: Sanders---NEED HELP!!!---
>
>Karl: If the jet purges well and fires (led lights up): Purge at 130C
(build) 125C (support) for 15 seconds, point a kimwipe and gently blot the
meniscus away and clean around the flat face, turn the kimwipe around and
very gently wipe the face of the jet clean and DRY (don't ever touch the
face with anything harder). Print and drop temp by about 3 degrees & repeat
down to 120 build 110 support. The trick for prolonged running is a clean
face that won't form a meniscus. If it faults, LOOK at the face carefully.
If it is wetted, blot and clean and maybe lower the tank 1/8 inch or drop
the temp a degree or two to stop reoccurrences (rare adjustments). If it's
dry (sucked up into the orifice) go the other way, assuming the plumbing is
clear (flag, line, streams well in purging, flows well through the bayonet
under purge. Important: Every 12 hours or less: reestablish the bubble in
the support jet which material absorbs air over that time enough to upset
the condition required to fire. After a prolonged shutdown, under mm_calib I
do a hot purge, restablish the proper bubble (both jets) (the build jet
oftentimes has drained) also checking a good flow through bayonet whilst
purging confirming good filters and line, clean faces and do a half dozen
prints or more after dropping to operating temps and at least three
calibration cycles to both calibrate and run-in the jets. The whole thing
takes less than 10 minutes with practice. It takes only five minutes every
12 hours of running to service both jets. Then it usually goes right to
work, and stays at work. As jets age they usually need a bit more voltage
and sometimes a couple/few more degrees C to keep printing reliably. Keeping
a fairly constant level in the tanks (constant head) helps too. It's all
common sense, and continued application. Don't be lazy about it. Tom
Richards, Metallurgist
>
>At 11:32 AM 10/22/98 PDT, you wrote:
>>
>>Hello All,
>>
>>
>>I have both an MM6 and a Model Maker 2 from Sanders and need help getting
>>them to run properly! Unfortunately I had them sitting idle for a couple
>>of months and have not been able to get them running again to save my
>>life. I have replaced print heads, heated lines, air pumps, filters and
>>other parts as instructed by Sanders and am at the limits of my patience
>>with these machines. Any suggestions from the population of this group
>>that has experience with these machines would be greatly appreciated!
>>
>>I normally would not address the masses on such a topic but I'm afraid
>>that Sanders is out of suggestions. These problems seem to crop up on
>>this equipment from time to time and I'd like to know how reliable the
>>other Sanders machines in use are. I have a hard time recommending that
>>we use the equipment when I can not guarantee we will ever see a part off
>>them.
>>
>>Again any help would be welcome!!!
>>
>>Karl
>>
>>For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
>>
>>
>
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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