I’ve had my 30x48 Longmill from Sienci for many months and as yet have not produced a single product. I’ve been in touch with Sienci many times.
Basically the machine loses “z” over and over thus ruining projects. Also, it has reversed one of the “y” motors direction binding the travel and then freezing the system. Also, now it cannot cut a circle without cutting a bump on the circumference ( see photos 1and 2). I have followed techs instructions but to no avail. (Loosen backlash, re-align and re-tension the wheels, etc)
The saga continued yesterday as I was trying to video the circle problem. As you can see in Photo 3 the machine selected a new beginning point and the circle was now off the original path. )
Is there anyone out there who might be having constant problems?
It is getting more and more difficult to contact them—and receive help. I sincerely believe they have given up on my problems. Either I’m on a black list —or the product is so unreliable that they are spending all their tech time trying to fix the unfixable.
Just realized that this forum apparently doesn’t allow photos. Any ideas on how I can include pics?
What speeds and feeds (I found idc to be on the agressive side of the spectrum and am mostly reluctant to use his tool database without heavy editing.) Missing steps due to too agressive cutting is a thing with open steppers especially with a not dialed in yet machine.
What cad/cam software.
Having the longmill mk2, it has never caused me any problems unless self inflicted. I’ve set it up once and it has worked for a good 4 years now without hickups. I know it’s not a 2.5 but take away the sensors and it mostly is the same machine.
Not sure what Gene is asking or trying to convey, but venting some understandable frustration.
@GeneO I saw your photos on Facebook and I agree with @Spamming_Eddie that your feeds and speeds may be too aggressive. Without closed-loop motors, the Longmill will never know if it has missed steps. So it will keep cutting along the path it thinks it needs to follow. It’s like playing pin the tail on the donkey. You think you’re heading in the right direction, but you’re not.
Lower your feeds and speeds as a first step.
There is also an upgrade to closed loop motors for the Longmill.