RE: SLA Problems

From: Dan Davis (
Date: Thu Feb 03 2000 - 18:42:33 EET

Hi Paul,

Here's some quick 'n' short answers:

Issue one: I'm not very familiar with SS lasers, but I would look into power conditioning (I had to put conditioners on my Ar-Ion's - I think that this is the main contributor to repeated 5000+ hour laser lifespans).

Issue two: I had this problem when the blade was misaligned. This can happen after a severe part crash or from a hardware failure. Pull the vat cover off and check to see if the idler drive belt has broken. Do you have smart sweep? There are upgrade cables for the smart sweep that include EMI protection. Both were issues on my machines.

Issue three: The vacuum is adjustable. If you have sucked resin into the lines you will have to clean them out. You may even have to disassemble the vacuum pump and clean resin out of it. It is quite simple, very similar to a tropical fish aquarium air pump. We installed clear lines in place of the black rubber line to aid in visualising problems.

Part sag issue: Have you looked at your overcures and wait times? Maybe supports are not the root cause of your problems.

Good Luck. If you do understand or have any other questions, feel free to call or email again.

Daniel C. Davis
Business Unit Manager - Transplant & Aftermarket Automotive
AMP Industries
42050 Executive Dr.
Harrison Township, Michigan 48045 USA
Phone: +1 810-469-4100 x455
Fax: +1 810-463-8650

-----Original Message-----
From: Paul Bordner []
Sent: Thursday, February 03, 2000 10:37 AM
Subject: FW: SLA Problems

Make this quick and short:

Is anyone out there experiencing any of the following problems with SLA5000:

1) Loss of laser power on a regular basis (3 times in the last 2 weeks with
only 3200 hours)
2) Frequent blade stalls for no reason, then machine does not register a
build abort and fails to call us to let us know
3) Loss of vacuum in the zephyr blade (actually sucks resin back to the
pumps then loses vacuum)

Also, we switched over to SL5220 6-8 months ago on one of our SLA250
machines and have experienced serious problems with this resin. Parts tend
to sag, droop, warp, etc no matter how many supports we build. Small
overhangs always need supported and 3D lightyear fails every time to do so.
We have contacted 3D several times and they have failed to come up with a
solution (actually, they recommended 3 solutions that have all failed to
produce better parts). They have promised to send an application engineer
on several occasions, but we have yet to see him.

Any feed back would be greatly appreciated!

Paul Bordner
Laser Reproductions
501 Morrison Road
Suite 101
Gahanna, OH 43230

p 614.470.6905 f 614.470.6907


visit our website:

For more information about the rp-ml, see

For more information about the rp-ml, see

This archive was generated by hypermail 2.1.2 : Tue Jun 05 2001 - 23:02:45 EEST